Consulta: subjectFacets:"Nutrient turnover"
Registros recuperados: 882
Data/hora: 16/06/2024 10:16:55

Assessment of selenium mineralization and availability from catch crops
Provedor de dados: Organic Eprints
Autores: Stavridou, Eleftheria; Thorup-Kristensen, Kristian; Young, Scott D.
Selenium (Se) release from four plant species (Indian mustard, fodder radish, Italian ryegrass and hairy vetch) was measured under controlled leaching conditions and in a pot incubation experiment as part of a study of the potential for using these plant species as Se catch crops. Catch crops may reduce Se leaching and, by subsequent release of Se from the plant material, increase the available Se for succeeding crops. Plants grown both without and with Se addition (250 g Se/ha) were tested. In the leaching experiment, frozen plant material was incorporated into soil columns and incubated at room temperature for up to 19 weeks. The results showed that Se concentrations in the leachate were higher when Se-enriched plant material was incorporated in the...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/19589/4/19589.pdf

Ökologischer Landbau auf leichten Böden - Ertragsparameter und Bodenfruchtbarkeitskennziffern aus dem Demonstrationsversuch Ackerbausysteme in Blumberg bei Berlin
Provedor de dados: Organic Eprints
Autores: Hoffmann, Heide; Hübner, W.
In einem langzeit-Feldversuch in Blumerg (bei Berlin) wurden seit 1993 landwirtschaftliche Nutzungssysteme miteinander verglichen. Untersucht und verglichen wurde die Entwicklung der Erträge, der Nährstoffzustand und biologische Parameter der Sandböden unter konventioneller und biologischer Bewirtschaftung. 7 Jahre nach Versuchsbeginn waren die Erträge der konventionellen Variante um 27% höher als die in der biologischen Variante. Es wurden nur geringe Unterschiede zwischen den Nährstoffgehalten der Anbausysteme. Die potentielle Bodenfruchtbarkeit, die in einem Gefäßversuch untersucht wurde, schien im biologischen Wirtschaftssystem höher zu sein. Die Auswertung der biologischen Parameter steht noch aus.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality; Soil biology.
Ano: 2001
URL: http://orgprints.org/1272/1/hoffmann%2D2001%2Dbodenfruchtbarkeit%2Dsandiger%2Dboden.pdf

Acúmulo e Velocidade de Liberação de Potássio de Resíduos de Plantas Anuais de Inverno Sob Diferentes Preparos de Solo
Provedor de dados: Organic Eprints
Autores: GEBERT, F.H.; KAMINSKI, J.; CALEGARI, A.; CASALI, C.A.; TIECHER, T.; PICCIN, R.; BELLINASO, R.J.S.
A manutenção dos resíduos vegetais sobre o solo, o tipo de resíduo e sua velocidade de decomposição são de grande importância no estudo da ciclagem de nutrientes. Este estudo foi desenvolvido na área experimental do IAPAR - Pato Branco-PR, onde foram avaliados seis resíduos de coberturas de inverno: tremoço azul (Lupinus angustifolius L.), ervilhaca comum (Vicia sativa L.), aveia preta (Avena strigosa S.), nabo forrageiro (Raphanus sativus L.), centeio (Secale cereale L.) e trigo (Triticum aestivum L.), sob Sistema Plantio Direto (SPD) e Sistema Cultivo Convencional (SCC) em um  Latossolo Vermelho aluminoférrico. Foi avaliado: velocidade de liberação de potássio (K), matéria seca remanescente (MSR) em bolsas de decomposição, teor de carbono orgânico...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil tillage; Greenhouses and coverings.
Ano: 2012
URL: http://orgprints.org/29925/1/2012%20-%20F%C3%A1bio%20-%20RBMCSA.pdf

Conversion to Organic Production Software (OrgPlan, OF0159)
Provedor de dados: Organic Eprints
Autores: Padel, Susanne.
This is the final report for Defra Project OF0159. The Organic Conversion Planner (OrgPlan) is a computer program for farmers and advisors reducing the time input necessary for planning a conversion to organic farming.   Conversion planning can help to identify whether organic management is suited to the farm and potential problems during the conversion period itself. This involves an assessment of the current situation of the farm, based on which proposals for an organic 'target (endpoint)' can be developed. This includes proposed rotation(s), cropping and stocking plan for the specific farm situation and the proposals need to be tested for their technical and financial feasibility, including impact on forage supply, nutrient requirements and financial...
Tipo: Report
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Farm nutrient management; Technology transfer; Animal husbandry; Farm economics.
Ano: 2001
URL: http://orgprints.org/7980/1/OF0159_2147_FRP.pdf

Entwicklung der Erträge und der Nährstoffversorgung auf dem Ökofeld in Roda (Sachsen)
Provedor de dados: Organic Eprints
Autores: Kolbe, Dr. Hartmut; Heinig, Caterina.
Seit der Umstellung auf ökologischen Landbau im Jahr 1995 wurden jährlich Daten von den Schlägen der beiden Fruchtfolgen (Bewirtschaftungssysteme mit und ohne Vieh) zu Anbauabfolge, Ernteerträgen, Qualität der Erzeugnisse und zu Pflanzennährstoffen im Boden erhoben.
Tipo: Conference paper, poster, etc.
Palavras-chave: Environmental aspects; Nutrient turnover; "Organics" in general; Crop combinations and interactions; Soil; Crop husbandry.
Ano: 2006
URL: http://orgprints.org/8872/1/20060606_Poster_FeldtagRoda_OekoFeldErgebnisse_Bilanzen1.pdf

Maiserträge und Humusbilanzen in ökologischen Energiepflanzen-Fruchtfolgen mit Gärrestdüngung
Provedor de dados: Organic Eprints
Autores: Levin, Karin; Simon, A.; Reents, Hans Jürgen; Hülsbergen, Kurt-Jürgen.
The long-term effects of biogas production in organic farming on soil fertility due to changes in crop rotations and the removal of carbon from these systems are, at  present, unclear. Data from a long-term field trial in Bavaria, Germany were used to evaluate the effects of different crop rotations and fertilization with biogas digestate on maize yields and humus balances. Digestate fertilization led to higher maize yields compared with an unfertilized control. Maize yields were lower when the maize was sown directly into a white clover cover crop. Humus balances show the importance of considering both the return of organic matter via fertilization and crop rotation design  to ensure that soil fertility is not depleted
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management; Root crops.
Ano: 2017
URL: http://orgprints.org/31554/1/Maisertr%C3%A4ge%20und%20Humusbilanzen%20in%20%C3%B6kologischen.pdf

Mikronährstoffversorgung in einem Langzeitversuch mit Stallmist- und mineralischer Düngung; pflanzenbauliche Konsequenzen für  den Ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Fischer, Meike; Raupp, Joachim; Oltmanns, Meike; Römheld, Volker.
Mikronährstoffe haben wesentliche Funktionen im pflanzlichen Stoffwechsel und sind vor allem für die Toleranz gegenüber abiotischen und biotischen Stressfaktoren von Bedeutung. Als Hinweis auf die Mikronährstoffversorgung im ökologischen Landbau wurden Boden- und Pflanzenproben des Langzeit-Düngungsversuches Darmstadt untersucht (Beginn: 1980; Sand-Braunerde, 9,5°C und 590 mm Jahresdurchschnitt, Varianten: Rottemistdüngung mit und ohne Anwendung der biol.-dyn. Präparate und Mineraldüngung in jeweils drei Stufen). Es wurden die Gesamtgehalte an Mn, Zn, Cu, und Fe des Bodens, die pflanzenverfügbaren Mengen sowie die Konzentrationen dieser Nährstoffe in Kartoffelblättern untersucht.  Die organisch gedüngten Parzellen enthalten größere Mengen (5,8 mg Zn kg-1...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/6267/1/p05fi.pdf

Assessment of Alternative Phosphorus Fertilizers for Organic Farming: Chars, Ashes and Slags
Provedor de dados: Organic Eprints
Autores: Möller, Kurt.
The application of sewage sludge to agricultural land, a common practice to recycle nutrients in the past, is currently prohibited in organic farming due to the risk of soil contamination from pollutants (e.g. toxic and potentially toxic elements, persistent organic pollutants, etc.). Incineration or disposal to landfill of dewatered sludge is costly, leads to greenhouse gas emissions, and eliminates the possibility of nutrient recovery, especially phosphorus. Options to treat dry organic matter are combustion and gasification, among other technologies to produce ashes or chars and to recover the residues for nutrient recycling. Dependent on the technology applied as well as the input material, nutrient concentrations and concentration of contaminants vary...
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2016
URL: http://orgprints.org/30920/1/Moeller2016-Factsheet-Ashes.pdf

Effect of organic treatments on soil carbon and nitrogen dynamics in vineyard
Provedor de dados: Organic Eprints
Autores: Priori, S.; D'Avino, L.; Agnelli, A.E.; Valboa, G.; Knapic, M.; Schroers, H.J.; Akca, E.; Tangolar, S.; Kìraz, M.E.; Giffard, B.; Fulchin, E.
The work aims to investigate the effects of different soil management strategies on carbon sequestration and total nitrogen in areas of vineyards suffering from loss of soil functionality. Treatments, selected for inter-row management, to re-install soil functionality were based on compost or other organic amendments (COMP), green manure (GM), and dry mulching (DM) strategies using winter legumes and cereals. Cover crops were seeded in fall and mown in late spring, leaved in the ground for mulching in DM or incorporated into the uppermost soil layers in GM. Such approaches were investigated in six vineyards in Italy, six in France, and two vineyards in Slovenia and Turkey.     The results showed that COMP significantly increased total organic carbon (TOC)...
Tipo: Journal paper
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover; Soil tillage; Soil; Biodiversity and ecosystem services; Viticulture.
Ano: 2018
URL: http://orgprints.org/33464/1/7896-25717-1-PB.pdf

Total N difference method and 15N isotope dilution methode - A comparative study on N-fixation
Provedor de dados: Organic Eprints
Autores: Müller, Dr. Torsten; Thorup-Kristensen, Dr. Kristian.
In the study, the 15N fixation of a number of green manure crops were studied using either the 15N dilution technique, or the simple total N difference method. The results of the two methods were not very different, and the total N difference method seemed to give as good results as the more complicated and expencive 15N dillution method.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/1458/1/KTK06007.pdf

Nutrient Budgeting: Organic Considerations for Implementing NRCS CPS 590
Provedor de dados: Organic Eprints
Autores: Brown, Sarah.
This webinar is focused on nutrient management on organic systems. It is addressed to US farmers, especially in the part dedicated to regulations. Agronomic information presented by the relator will be useful also for European organic farmers, both experts and newcomers. It is organised in sections: US regulations; evaluation of crops nutrient requirements; evaluation of nutrients release from organic matter, amendments and cover crops; fertilization, timing and application methods; leaching and runoff risk. Data values are presented in US units of measure: pounds per acre. The conversion factor to kg per ha is nearly 1 (1.12), so quite straightforward.
Tipo: Practice tool
Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/32602/1/Nutrient_budgetWeb.png

Abschätzung des Risikos einer Schwermetall-Akkumulation in  Böden durch längerfristige Anwendung von Recycling-  Phosphor-Düngemitteln
Provedor de dados: Organic Eprints
Autores: Weissengruber, Lina; Friedel, Jürgen K.; Möller, Kurt.
In order to assess the risk of the use of recycled phosphorus (P) fertilisers for organic farming, the potential accumulation of heavy metals in soil after a 200-year fertilizer application equivalent to 11 kg P ha-1 yr-1 was calculated in a mass balance approach. Both fertilizers currently allowed in organic farming and recycled P fertilizers were regarded. For heavy metals, four scenarios with two soil pH levels (pH 5 and pH 7) and two precipitation excess levels (F 0.1 and F 0.3 m yr-1) were calculated. Recycled P fertilizers like struvite, meat- and bone meal, ashes, sewage sludge and digestate, as well as phosphate rock and triple superphosphate had a higher P content and a lower heavy metal-to-P ratio than composts. Consequently, compost application...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31898/1/Absch%C3%A4tzung%20des%20Risikos%20einer%20Schwermetall-Akkumulation.pdf

Ripristino della funzionalità dei suoli nelle aree  degradate del vigneto con metodi biologici
Provedor de dados: Organic Eprints
Autores: Priori, S.
Presentation for technical workshop, 23 November 2017, Firenze (Italy)
Tipo: Teaching resource
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Biodiversity and ecosystem services.
Ano: 2017
URL: http://orgprints.org/32419/1/Present_seminario%20resolve_23%20novembre.pdf

An early Assessment of a Plant-based Organic Vegetable System: Analysis of inorganic-N and soil enzyme activity
Provedor de dados: Organic Eprints
Autores: Jensen, Janne Guldbæk Kirstejn.
Study of soil and plant nitrogen pools and soil microbial activities in the DoubleCrop trial at AU-FOOD Årslev
Tipo: Thesis
Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover; Soil tillage; Air and water emissions; Soil; Vegetables; Root crops.
Ano: 2018
URL: http://orgprints.org/35460/1/Janne%20Guldb%C3%A6k%20Kirstejn%20Jensen_1103769_542889_Hand-in_An-early-Assessment-of-a-Plant-Based-Organic-Ve.pdf

Stabilisierung von C aus Stroh und Gründüngung im Boden  -Ergebnisse eines Inkubationsversuches
Provedor de dados: Organic Eprints
Autores: Dannehl, Theresa; Brock, Christopher; Leithold, Günter.
Stroh und Gründüngung stellen im Marktfruchtanbau die wesentlichen Substrate für die Versorgung der Böden mit organischer Substanz dar. Weitere organische Dünger sind zumeist nicht oder nur in geringem Umfang vorhanden. Diese Situation erfordert eine differenzierte Bewertung der Humusreproduktionsleistung von Stroh und Gründüngung. Im Rahmen des BÖLN-Projektes „Sicherung der Humusvorräte mit Grün- und Strohdüngung“ (2811NA061) wird u.a. geprüft, inwiefern die kombinierte Betrachtung der C- und N-Massenbilanzen eine anwendbare Option hierfür darstellt. Die Hypothese ist, dass sich das CN-Verhältnis im Substrat-Boden-Gemisch mittelfristig stets wieder einem standortspezifischen Wert annähert. Die Stabilisierung von Substrat-C im Boden wäre somit  (u.a.) von...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil.
Ano: 2015
URL: http://orgprints.org/27223/1/27223_dannehl.pdf

On-Farm nutrient balance assessment to improve nutrient management on organic dairy farms
Provedor de dados: Organic Eprints
Autores: Taube, Friedhelm; Pötsch, E.M.
A survey is presented on the impact of different intensities of grassland management related to nutrient balances and their assessment. With special reference to data from Austria and Germany, it is postulated that on-farm nutrient balance assessment is a valuable tool for identifying deficits in efficiency of nutrient use in the soil-plant-animal system. Farm gate balances can be used as indicators for Codes of Good Agricultural Practice in Europe, if input/output parameters and calculations are standardised and if acceptable surpluses are regionally validated.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Pasture and forage crops.
Ano: 2001
URL: http://orgprints.org/2362/1/handbuch%2Dkein%2DDokument.pdf

DoubleCrop: Dobbeltdyrkning og plantebaserede gødninger til dyrkning af rækkeafgrøder
Provedor de dados: Organic Eprints
Autores: Hefner, M.; Sørensen, Jørn Nygaard; de Visser, Richard; Kristensen, Hanne Lakkenborg.
Præsentation af DoubleCrop ved et avlermøde
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover; Soil tillage; Air and water emissions; Vegetables; Root crops.
Ano: 2019
URL: http://orgprints.org/35461/1/190305_DoubleCrop_avlerm%C3%B8de_Margita.pdf

Soil quality grouping variables in OSCAR-MEE
Provedor de dados: Organic Eprints
Autores: Marinari, S.; Papp, R.; Sripada, U.; Thami-Alami, I.; Campiglia, E.; Pearce, Bruce; Bergkvist, Göran; van der Heijden, Marcel; Baresel, Jörg Peter; Finckh, Maria R.
Soil chemical properties were correlated with microbial biomass and its activity. Different correlations were found  at the beginning of the first and second cycles, respectively. Soil samples were grouped with respect to the different climate zones. The main variables that separated the countries were organic Carbon, total Nitrogen, pH and clay content.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover; Soil.
Ano: 2016
URL: http://orgprints.org/29643/1/poster%20OSCAR%202.pdf

Understanding soil nitrogen supply: organic matter quality and quantity
Provedor de dados: Organic Eprints
Autores: Shepherd, Mark; Hatch, David; Hatley, Damian.
The soil organic matter (SOM) contents of organic and conventionally farmed soils were compared. Whilst the quantity of SOM was found to be similar with both systems, the quality of SOM differed in respect of higher amounts of N released by the organic soils under anaerobic incubation. This indicated a greater potential rate of mineralization and suggested that the inherent fertility of the organic soils had been improved
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farming Systems; Soil quality.
Ano: 2002
URL: http://orgprints.org/8263/1/Hatch_soil_nitrogen_supply.pdf

Soil nutrient status and okra pod yield as influenced by plant density and cattle dung manure application
Provedor de dados: Organic Eprints
Autores: Law-Ogbomo, K.E.; Osaigbovo, A.U.; Ogedegbe, S.
A field was carried out on an ultisol in humid area of Edo State, Nigeria to evaluate the effects of plant density and cattle dung manure application on soil nutrient status and okra pod yield. Treatments consisted of three levels of cow dung (0, 300 and 450 kg N ha-1) and three plant densities (47,619, 66,666 and 83,333 plants per hectare (pph)). A 3 x 3 factorial arrangement fitted into randomized complete block design and replicated three times. Data were collected on soil chemical properties and pod yield of okra. Routine analysis of the soil indicated that the soil was low in nutrient content, thus addition of cattle dung to the soil at various levels influenced the soil nutrient status positively. After cropping with okra, cattle dung application had...
Tipo: Conference paper, poster, etc.
Palavras-chave: Production systems; Composting and manuring; Nutrient turnover; Environmental aspects; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/22646/1/22646%20Cattle%20dung%20trial_MM.pdf

Smernice za tehnike izboljšanja tal v vinogradih
Provedor de dados: Organic Eprints
Autores: Knapic, M.; Priori, S.; D'Avino, L.
Guidelines for soil restoration in vineyard (in Slovenian language)
Tipo: Teaching resource
Palavras-chave: Soil quality; Crop combinations and interactions; Soil biology; Composting and manuring; Nutrient turnover; Soil tillage; Soil; Biodiversity and ecosystem services; Landscape and recreation; Viticulture.
Ano: 2018
URL: http://orgprints.org/33861/1/Guidelines%20Resolve%20soil%20restoration%20techniques_SLOVENIAN.pdf

Competitive forbs in high-producing temporary grasslands with perennial ryegrass and red clover can increase plant diversity and herbage yield
Provedor de dados: Organic Eprints
Autores: Dhamala, N.R.; Søegaard, K.; Eriksen, J.
European agriculture focuses on increasing biodiversity. However, in highly productive temporary grasslands in grass / arable systems, the biodiversity is usually low. Three non-leguminous species have shown high competitive strength in temporary grasslands and ample possibility to increase biodiversity without compromising yields. In this experiment, we examined in detail the competitiveness and productivity of the three forb species: chicory (Cichorium intybus), ribwort plantain (Plantago lanceolata) and caraway (Carum carvi) grown in different proportions in mixtures including traditional grassland species: perennial ryegrass (Lolium perenne) and red clover (Trifolium pratense), with fertiliser application as an additional factor. Dry matter (DM) yield...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/34987/1/Grassland%20and%20forages%20in%20high%20output%20dairy%20farming%20systems.pdf

Stickstoffversorgung von Weisskohl, Silo- und Körnermais durch Winterzwischenfrucht-Leguminosen
Provedor de dados: Organic Eprints
Autores: Haas, Guido.
Untersucht wurde die Stickstoffzufuhr mit dem Anbau von Leguminosen als Winterzwischenfrüchte (Zottelwicken, Inkarnatklee, Landsberger Gemenge, Wickroggen). Referenzvarianten waren Rübsen, Roggen und Gras in Reinsaat sowie Brache. In Feldversuchen an drei organisch bewirtschafteten Standorten im Rheinland wurden in den Jahren 2002 und 2003 die Zwischenfrüchte und Nachfruchtwirkung geprüft. Bestimmt wurden Ertrag (21 - 62 dt TM/ha), Stickstoffaufnahme (65 - 200 kg N/ha) und Netto-N-Fixierung (im Mittel 100 kg N/ha). Die Zwischenfrüchte wurden im Mai/Juni gemulcht oder beerntet. In den ersten Wochen nach Umbruch der Zwischenfrucht und Saat der Nachfrucht wurde der Verlauf der N-Mineralisierung im Boden gemessen (max. 50 - 180 kg Nmin-N/ha im Ap).   Der...
Tipo: Book
Palavras-chave: Nutrient turnover; Crop combinations and interactions.
Ano: 2004
URL: http://orgprints.org/13944/1/Report_Wicke04.pdf

Composition of hydrolysable amino acids in soil organic matter and soil microbial biomass
Provedor de dados: Organic Eprints
Autores: Friedel, Jürgen K.; Scheller, Edwin.
We hydrolysed (6 M HC1) soll organic matter (SOM) from mineral top-soil horizons, litter, and the fraction rendered extractable by 0.5 M K2SO4 after Chloroform fumigation from eight soils under arable, grassland and forest use. covering a wide ränge of site conditions. Our aims were to quantify amino acid contents in the hydrolysate derived from whole soil. litter and soil microbial biomass, respectively. We also wanted to test if the pattern of hydrolysable amino acids of the whole soil is uniform irrespective of site conditions and land use. and if there i s a relation with the amino acid pattern of the respective soil microbial Community. The content of hydrolysable amino acids in the whole soil was higher in the soil samples from grassland and forest...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology.
Ano: 2002
URL: http://orgprints.org/1372/1/kein%2DDokument.pdf

Anaerobic mono-digestion of lucerne, grass and forbs - Influence of species and cutting frequency
Provedor de dados: Organic Eprints
Autores: Wahid, R; Feng, L; Cong, WF; Ward, A; Møller, HB; Eriksen, J.
In the present study, biogas potentials of multispecies swards including grass, lucerne, caraway, ribwort plantain and chicory from two- and four-cut regimes (Mix-2 and Mix-4) for mono-digestion applying batch and continuous modes under lab-scale conditions were investigated. The gas yields in terms of volatile solids (VS)loaded from Mix-2 and Mix-4 were compared with pure stand lucerne from the four cuts regime (Lu-4). The batch test results indicate that methane yield on a VS basis was highest from Mix-4 (295 L kg−1), followed by Mix-2 (281 L kg−1) and Lu-4 (255 L kg−1). The results were confirmed with continuous experiments, during which the reactor digesting Mix-4 was stable throughout the experiment with low ammonia and volatile fatty acid...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/32974/1/Wahid%20et%20al%202018.pdf

Anforderungen an die Humusbilanzierung in der Praxis des ökologischen Landbaus
Provedor de dados: Organic Eprints
Autores: Kolbe, Hartmut.
Humus balance methods produces organic matter balance sheets calculated from factors describing the cultivation effects of humus increasing and humus depleting crops, and organic manure application. Related results were tested for accuracy by comparison with findings from long-term field trials conducted in different climatic regions and soil types throughout Germany. Adaptations were presented especially for the practical use in organic farming.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Soil quality; Composting and manuring.
Ano: 2007
URL: http://orgprints.org/3516/1/Humusbilanzierg_OeL_2005Internet.pdf

Nitrate leaching in grazed grasslands of different composition and age
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Vinther, F.P.
In a field experiment at Research Centre Foulum a suction cup technique was used to investigate nitrate leaching from grassland depending on composition (grass-clover or perennial ryegrass), management (grazing or cutting) and age of the swards. In 1997-2001 was investigated the successive nitrate leaching from 4-7 year old grazed grass-clover and ryegrass with cut plots of similar age and spring barley as reference. In 2000-2001 the simultaneous nitrate leaching from newly established swards, swards grazed for 1 and 7 years and swards cut for 7 years was investigated. In the newly established swards nitrate leaching from grass-clover and ryegrass were similar but at increasing sward age nitrate leaching from the fertilized ryegrass increased dramatically...
Tipo: Book chapter
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/160/1/cfp404.pdf

Economic aspects of the application of different organic materials as N-sources in organic production of lettuce
Provedor de dados: Organic Eprints
Autores: Cabilovski, dipl ing Ranko; Manojlovic, Prof Maja; Bogdanovic, Prof Darinka; Bavec, Prof Martina.
In a field experiment on a farm registered for organic production, we studied the effect of the application of different organic materials (OM): farmyard manure (FYM), guano (G), soybean seed (S), forage pea seed (P) on lettuce yield. Besides yield, we also analyzed the economic profitability of the application of different OM. Fresh lettuce yield was significantly higher with OM treatments than with the treatments without fertilization. The highest yield was obtained with the FYM treatment (43.7 t ha-1), and the lowest with the application of P (42.0 t ha-1). The highest additional profit was obtained with the FYM treatment (1123 EUR ha-1) and the lowest with the application of P (475 EUR ha-1).
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm economics.
Ano: 2008
URL: http://orgprints.org/12085/1/Cabilovski_12085_ed.doc

Organic manures as sources of fertiliser sulphur
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
On a global scale, S excretion from domestic animals may be estimated to around 8 million t per year, corresponding to 80% of the World S consumption for mineral fertiliser manufacture. The utilisation of this potential source of fertiliser-S is discussed focusing on the use of manure from housing and manure storages applied to agricultural land. Especially in the developed countries the S content of manure collected from cattle and pigs (1 million t S per year) has a potential as S-fertiliser, as legal demands on the utilisation of manure N and/or P already require the use of animal wastes as fertilisers. Content and composition of manure-S from both monogastrics and ruminants may be extremely variable, depending on the S content of the feed. If the diet...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/3176/1/Proc_505_Eriksen_proof.pdf

Leitfaden zur Humusversorgung. Informationen für Praxis, Beratung und Schulung
Provedor de dados: Organic Eprints
Autores: Kolbe, Hartmut; Zimmer, Jörg.
In dem vorliegenden Leitfaden werden in allgemeinverständlicher Form zunächst die bodenkundlichen und pflanzenbaulichen Grundlagen zur Humuswirtschaft mit dem neuesten Stand vorgestellt. Anschließend werden geeignete Methoden zur Bodenuntersuchung und Humusbilanzierung beschrieben. An Hand von Beispielen werden Anleitungen zur Durchführung von Bilanzierungen und zur Interpretation der Ergebnisse gegeben. Im Mittelpunkt des Leitfadens stehen Handlungsgrundlagen zur Sicherung der Bodenfruchtbarkeit durch Aufrechterhaltung einer optimalen Versorgung mit organischer Substanz für den konventionellen und ökologischen Ackerbau. Die Broschüre ist ein wichtiger Ratgeber für Verwaltung, landwirtschaftliche Praxis, Beratung und Schulung.
Tipo: Book
Palavras-chave: Soil quality; Crop combinations and interactions; Composting and manuring; Nutrient turnover; Technology transfer.
Ano: 2015
URL: http://orgprints.org/29534/1/Humusreproduktion-web.pdf

Verwerken van maaisel voor landbouwkundig gebruik: Waarde van compost,bokashi en bermgraskuil als meststof
Provedor de dados: Organic Eprints
Autores: Janmaat, Leen.
Gewasresten van het landbouwbedrijf en maaisel uit beheersgebieden vormen reststromen die geschikt zijn als organische meststof. Deze reststromen kunnen als input voor composteren worden gebruikt. Bij composteren verdwijnt een deel van de organisch gebonden koolstof naar de lucht. Een alternatief is het fermenteren en conserveren van maaisel en andere inputs is het zogenaamde Bokashi-methode. Bokashi betekent “goed gefermenteerd organisch materiaal”. Met behulp van micro-organismen, zeeschelpenkalk en kleimineralen wordt het fermentatieproces in werking gezet.Het fermenteren vindt plaats onder zuurstofloze omstandigheden. In Noord-Holland zijn experimenten gedaan met het bereiden van Bokashi en die zijn vergeleken met compost. De waarde van Bokashi kan...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Environmental aspects; Farm nutrient management.
Ano: 2015
URL: http://orgprints.org/36520/1/3102.pdf

Bioboden - gut fürs Klima
Provedor de dados: Organic Eprints
Autores: Gattinger, Andreas; Menzler, Minou.
Wie klimawirksam ist welche Art der Bodenbewirtschaftung? Und wie viel Humus entsteht dabei? Wissenschaftler beschäftigen sich immer wieder mit diesem Thema. Minou Menzler befragte hierzu den Bodenexperten Andreas Gattinger.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Soil tillage; Air and water emissions.
Ano: 2015
URL: http://orgprints.org/29343/1/gattinger-2015-interview-OEL176-p22.pdf

Omsætning i jordpuljen på forskellige bedriftstyper
Provedor de dados: Organic Eprints
Autores: Petersen, B.M.; Berntsen, J.
En af de vigtigste faktorer, der bestemmer jordens frugtbarhed, er dens indhold af organisk stof. Der er bundet store mængder af kvælstof heri, og den årlige omsætning i marken af kvælstof udgør kun en lille brøkdel af den totale mængde.    Dette indlæg fokuserer på langtidseftervirkningen, som et resultat af jordens dyrkningshistorie.
Tipo: Report chapter
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/4666/1/bmp_n_temadag.doc

Nährstoffmanagement im Ökologischen Gemüsebau mit neuen Düngestrategien und EDV-gestützten Tools (Verbundvorhaben)
Provedor de dados: Organic Eprints
Das hier beschriebene Verbundvorhaben umfasst folgende Teilprojekte: FKZ 18OE013, FKZ 18OE057, FKZ 18OE058, FKZ 18OE059, FKZ 18OE060, FKZ 18OE061, FKZ 18OE062, FKZ 18OE063 und FKZ 18OE064.  Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/id/saved_search/1729.  Ziel des Vorhabens ist die Verbesserung des Nährstoffmanagements im ökologischen Gemüseanbau im Sinne einer Erhöhung der N-Effizienz, ausgewogenen K-Bilanzen und einer Verringerung der P- und S-Überbilanzen, im Freiland wie im geschützten Anbau. Unser Vorhaben basiert auf einer Zusammenstellung des aktuellen Wissenstands, der durch exemplarische Erhebungen von Nährstoffimporten (v.a....
Tipo: Project description
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2023

Ackerbausysteme im ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Beckmann, Uta; Kolbe, Hartmut; Model, Annett; Russow, Rolf.
Zusammenfassung der Ergebnisse und Schlussfolgerungen:    Auf einem Sandboden und einem Lößboden wurden in Sachsen ab dem Jahr 1992 komplexe Dauerversuche durchgeführt. Es wurden Verfahren von viehlosen (System Marktfruchtbau) sowie von viehhaltenden Betrieben (System Futterbau) in der Anbaufolge mit zweijährigem Leguminosengras, Sommerweizen und Mais simuliert. In den Versuchen wurden außerdem eine stark unterschiedliche Düngungshöhe mit verschiedenen organischen Düngemitteln sowie differenzierte anbautechnische und vegetationsbegleitende Maßnahmen berücksichtigt. Die Anbauverfahren wurden sowohl in ihren kurzzeitigen Auswirkungen auf Nährstoffdynamik (Nmin, gasförmige N-Emissionen), Ertrag und Produktqualität der Kulturarten als auch in ihren...
Tipo: Report
Palavras-chave: Nutrient turnover; Systems research and participatory research; Crop combinations and interactions; Production systems; Soil quality; Soil tillage; Composting and manuring.
Ano: 2000
URL: http://orgprints.org/1535/1/Link%2DVolltext.htm

Organik Ispanak Üretiminde Farklı Bitki Besin Maddesi Uygulamalarının Toprak Yapısı Üzerine Etkilerinin Belirlenmesi
Provedor de dados: Organic Eprints
Autores: BEŞİRLİ, Gülay; SÖNMEZ, İbrahim; Keçeci, Mehmet; Güçdemir, İbrahim.
Bu çalışma, yeşil gübrelemenin toprağın fiziksel ve kimyasal yapısı üzerine etkilerini belirlemek amacı ile Yalova koşullarında yürütülmüştür. Deneme, yeşil gübreli ve yeşil gübresiz olmak üzere iki ana parselde tesadüf blokları deneme deseninde çakılı deneme düzenine göre planlanmıştır. Araştırmada yeşil gübre bitkisi olarak adi fiğ kullanılmıştır. Bitki besin maddesi olarak ise;  deniz yosunu özü (DYÖ), bioenzim (BİO), sığır gübresi (SG), tavuk gübresi (TG), koyun gübresi (KG) ve ticari gübre (NPK) ele alınmıştır. Deneme parsellerinde su ile doymuşluk miktarını en fazla artıran uygulama KG olmuş bunu SG, NP, TG ve şahit izlemiştir. YG uygulaması yapılan parselde su ile doymuşluk özelliği %50.51 olarak belirlenirken YG’siz parselde bu miktar %45.69...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil.
Ano: 2010
URL: http://orgprints.org/33402/1/Organik%20%C4%B1spanak.pdf

Øget udnyttelse af kvælstof efter ompløjning af afgræsset kløvergræs
Provedor de dados: Organic Eprints
Autores: Hansen, E.M.; Eriksen, J.; Vinther, F.P.
Ompløjning af afgræsset kløvergræs frigiver store mængder kvælstof (N), som let udvaskes og går tabt. En øget udnyttelse af kvælstof kræver, at udvaskning af nitrat reduceres. Etablering af alm. rajgræs som efterafgrøde kan være en effektiv metode til at mindske udvaskningen, men den mest effektive metode har vist sig at være dyrkning af grønkorn (byg, der høstes ved begyndende skridning) med udlæg af ital. rajgræs. Derved kan N-udnyttelsen øges betydeligt, og udvaskningen nedbringes til et minimum svarende til vedvarende græs på naturarealer.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/5473/1/5473.pdf

Gross sulphur mineralisation-immobilisation turnover in soil amended with plant residues
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
The rates of sulphur (S) released to and removed from the soil inorganic pool were estimated using the isotopic dilution technique. In an initial study fresh soil was mixed with combinations of two inorganic S levels (0 and 10 µg S g-1 soil) and three plant residues (wheat straw, perennial ryegrass and oilseed rape) and followed over 32 days of incubation. As 35S recovery was inadequate prior to day 2 and re-mineralisation of immobilised 35S occurred after day 8 thereby invalidating the method, estimates of gross S transformation rates should be based on data sampled between days 2 and 8. In the main experiment 16 plant residues with ranges in S contents of 0.08-0.81%, C/S ratios of 50-604 and lignin content of 0.9-10.8 were mixed with soil and...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/3175/1/3175.pdf

Composting of tomato wastes and sheep manure: An eco-friendly waste valorisation for enhancing the environmental sustainability in Souss Massa region (Morocco)
Provedor de dados: Organic Eprints
Autores: Tabrika, Ilyass; Azim, Khalid; Mayad, El Hassan; Zaafrani, Mina.
Each season, a huge amount of crop residues is regenerated by horticultural production. The main type of wastes are tomato stalks, leaves and axillary buds which are subsequently the result of crop operations like trimming and plants trellising and uprooting. The landfilling of corps residues is a serious problem that need to be solved. Therefore, the valorisation of these organic wastes by composting is a simple way for suitable management and the produced compost could be used as an organic amendment to satisfy the crop growth needs and agronomic soil requirements. The aim of the study is to investigate the impact of the mixing proportion of tomatoes residues and sheep manure using an experimental biocomposter of capacity 220 L with passive aeration...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/32792/3/37%20Ilyass%20Tabrika%20Article.pdf

Kamdyrkning (drill) – et økologisk alternativ
Provedor de dados: Organic Eprints
Autores: Henriksen, C.B.; Rasmussen, J.
I projektet CARMINA undersøges de potentielle fordele ved at anvende kamme som alternativ til pløjning. Det er tidligere vist at kamme kan reducere udvaskning af kvælstof, øge omsætningen af organisk stof og sikre en tidligere såning samt bedre etablering. I CARMINA kombineres kamme med dyrkning af fangafgrøder og inkorporering af husdyrgødning i en række nye forsøg.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Production systems; Soil tillage.
Ano: 2002
URL: http://orgprints.org/125/1/Kamdyrkning_fra_rapp_03_2002.pdf

Bønder sparer mye på å samarbeide om møkka
Provedor de dados: Organic Eprints
Autores: Land, Anita Marlene.
Nabosamarbeid om spredning av husdyrgjødsel
Tipo: Web product
Palavras-chave: Farming Systems; Nutrient turnover; Environmental aspects.
Ano: 2018
URL: http://orgprints.org/33879/1/B%C3%B8nder%20sparer%20mye%20p%C3%A5%20%C3%A5%20samarbeide%20om%20m%C3%B8kka%202018%20AL.pdf

Leaching of dissolved organic carbon (DOC) and nitrogen (DON) from grass-clover pastures after ploughing
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.; Eriksen, J.; Hansen, E.M.
In mixed arable grassland systems there can be a considerable build-up of nitrogen (N) caused by input through symbiotic N2 fixation and by the deposition from grazing animals. After ploughing of such grazed grassland large amounts of inorganic N may be released through mineralisation and subsequently leached to deeper soil layers or eventually to the groundwater. However, not much is known about the contribution of dissolved organic nitrogen (DON) to the total amount of N leached.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Pasture and forage crops; Air and water emissions; Soil tillage.
Ano: 2004
URL: http://orgprints.org/3374/1/3374.pdf

Stor forskel på energiafgrøders udledning af drivhusgas
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.
Udledning af drivhusgas ved dyrkning af energi-afgrøder kan ophæve en betydelig del af den drivhusgas-gevinst, der er forbundet med biobrændsler
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2010
URL: http://orgprints.org/18327/1/327a.pdf

THE EFFECT OF FARMING SYSTEM ON SOIL MICROBIAL  HYDROLYTICAL ACTIVITY
Provedor de dados: Organic Eprints
Autores: Madsen, Helena; Talgre, Liina; Eremeev, Viacheslav; Sanches De Cima, Diego; Luik, Anne.
The aim of this study was to investigate the influence of conventional and organic farming on soil hydrolytic activity (FDA). The experiment consisted of five-field crop rotation with three organic systems: Org 0 without winter cover crops (as control), Org I with winter cover crops and Org II with winter cover crops plus composted manure; and two conventional farming systems: Conv I as control (no fertiliser use) and Conv II (with mineral N). The results show increase of FDA in all systems in 2013. Within the average of 2012-2014 the FDA is the lowest in Conv. I and the highest in Org II system.
Tipo: Conference paper, poster, etc.
Palavras-chave: Production systems; Soil biology; Nutrient turnover; Farm nutrient management.
Ano: 2016
URL: http://orgprints.org/32505/1/Madsen%20et%20al%202016_THE%20EFFECT%20OF%20FARMING%20SYSTEM%20ON%20SOIL%20MICROBIAL%20HYDROLYTICAL%20ACTIVITY.pdf

Saisonale Dynamik von Ct und Nt im Boden unter Winterweizen  mit nachfolgender Zwischenfrucht
Provedor de dados: Organic Eprints
Autores: Hillebrecht, Björn; Brock, Christopher; Leithold, Prof.Dr. Günter.
The aim of this work was to study seasonal changes of topsoil Ct and Nt contents in  comparison with Ct and Nt mass changes. The survey was carried out under winter rye  with succeeding catch crop. A special experimental design was chosen to minimize  space/time interactions and prevent disturbance of sampling points at the same time.  The observation of mass changes instead of content changes substantially improved  the analytical quality of results in this study, which was in line with findings from the  literature. It is concluded that considering bulk density should therefore be  recommended as a standard procedure in surveys of soil Ct and Nt dynamics.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2009
URL: http://orgprints.org/14567/1/Hillebrecht_14567.pdf

DOC trail: soil organic matter quality and soil aggregate stability in organic and conventional soils
Provedor de dados: Organic Eprints
Autores: Fliessbach, Andreas; Hany, Roland; Rentsch, Daniel; Frei, Robert; Eyhorn, Frank.
Conclusion  Soil organic matter quality is affected by the agricultural systems of the DOC trial. System effects on the chemical composition, however, were smaller than those on the living organisms in soil and their functions. A close correlation was found between soil structure and microbial biomass indicating that microbes are playing an important role in soil structural stability.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality; Soil biology.
Ano: 2000
URL: http://orgprints.org/2911/1/fliessbach%2Det%2Dal%2D2000%2Dsoil%2Dorganic%2Dmatter.pdf

Svovl i økologiske sædskifter
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Det seneste årti har der været stigende opmærksomhed på gødskning med svovl (S) i det konventionelle landbrug. Tidligere, hvor nedfaldet af svovl fra atmosfæren var op imod 40 kg pr. ha, var det nok til at dække planternes behov. En reduktion af forureningen fra afbrænding af olie og kul har sænket nedfaldet til under 10 kg svovl pr. ha, og planterne har derfor i dag et reelt behov for supplerende tilførsel af svovl.    En tilstrækkelig forsyning med svovl er vigtig, ikke alene for udbyttet, men også for kvaliteten af foder og brødhvede. Det har desuden vist sig, at svovl har betydning for planternes udnyttelse af kvælstof (N). Disse forhold gælder naturligvis også under økologiske betingelser, hvor behovet dog er mindre på grund af et lavere udbytteniveau.
Tipo: Web product
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/3196/1/Svovl.doc

Perspectives on nutrient management in mixed farming systems
Provedor de dados: Organic Eprints
Autores: Watson, C.A.; Öborn, I.; Eriksen, J.E.; Edwards, A.C.
Changes in agricultural subsidies in Europe and the ready availability of fertilisers have allowed a spatial decoupling of livestock and crop production. This has increased the flow of nutrients that occurs between farms compared to within individual farms. In terms of nutrient cycling mixed farms provide the opportunity to re-integrate aspects of agricultural production. The degree of integration between crop and livestock production is defined by the reliance on the use of home-produced feed compared to imported feed, and is independent of intensity. Farm scale nutrient use efficiency (NUE) is inversely related to stocking density. Management of inputs and/or internal flows offers the scope to improve NUE on mixed farms. Greatest uncertainties in...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/4571/1/4571.doc

Brassica spp cover crop affects soil microbial activity, carbon and nitrogen nutrient dynamics
Provedor de dados: Organic Eprints
Autores: Marinari, S.; Papp, R.; Marabottini, R.; Moscatelli, M.C.
A general positive effect of Brassica on soil microbial biomass and its activity was observed at all European sites in no tilled soil at both sampling date. Conversely, Brassica under tillage may produce a negative effect on biochemical properties after CC suppression. The effect of Brassica on C and N dynamics differed among the european sites when soil was tilled. These preliminary results establish the bases for the evaluation of the interaction between the pedoclimatic conditions and Brassica spp effect on soil properties.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/29639/1/poster%20Soil%20Brassica%20CC%20Norway.pdf

Lite nitrogentap fra mjølkegarder som baserer seg på egen fôrprodukjson
Provedor de dados: Organic Eprints
Autores: Steinshamn, Håvard; Bleken, Marina Azzaroli; Hansen, Sissel.
Tap av nitrogen (N) er et stort problem i landbruket, og i Europeiske direktiver blir det krevd forandring i landbrukspraksis for å redusere avrenningen. Ekstensiv mjølkeproduksjonen basert på heimeprodusert fôr er den mest effektive måten å bedre N-effektiviteten på. N-effektiviteten på gardsnivå reduseres dersom innkjøpet av fôr er høgt i forhold til planteproduksjonspotensialet på garden.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Dairy cattle; Farming Systems.
Ano: 2004
URL: http://orgprints.org/4028/1/4028.pdf

N-management in grass-arable crop rotations
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Hansen, E.M.
Nitrogen accumulation in grazed grassland is difficult to utilize efficiently, but appropriate farm management can minimize nitrate leaching.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Dairy cattle; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/10044/1/10044.doc

PlantyOrganic: Voortgang 2012
Provedor de dados: Organic Eprints
Autores: Burgt, Geert-Jan H.M.; Werkman, Douwe; Bus, Michiel.
2012 was het eerste jaar waarin de systeemontwikkeling "PlantyOrganic" in praktijk is gebracht. Op de zes percelen zijn de gewassen geteeld die voorzien waren en zijn metingen verricht aan bodem en gewas. De gebruikte meststoffen waren slechts gedeeltelijk volgens het ontwerp omdat er nog geen voorraad aan maaimeststoffen was opgebouwd. De bodemstikstof is getoetst met metingen die in het stikstofmodel NDICEA zijn ingevoerd. De match tussen metingen en berekeningen is voldoende tot goed, met een enkele uitzondering. De gewassen zijn succesvol geteeld, met in opbrengst peen als uitschieter naar boven en zomertarwe als uitschieter naar beneden. Stikstof lijkt alleen in de bloemkool niet voldoende voorhanden te zijn geweest hoewel ook hier de opbrengst niet...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Crop husbandry; Soil.
Ano: 2012
URL: http://orgprints.org/28348/1/2969.pdf

Dyrk flere afgrøder i marken samtidig
Provedor de dados: Organic Eprints
Autores: Hermansen, Nina.
Results from the Danish InterVeg project including intercropping of leek and catch crops
Tipo: Web product
Palavras-chave: Nutrient turnover; Vegetables.
Ano: 2016
URL: http://orgprints.org/32028/1/index.html

Productivity and N-leaching in organic dairy grass-arable crop rotations
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Askegaard, M.; Søegaard, K.
Increasing size of organic dairy farms makes grazing of all cropped land inexpedient due to long distance to the milking facilities. We investigated nutrient dynamics and feed production in two dairy crop rotations with differences in proportion of grazing and cutting. One six year crop rotation represents close to the farm buildings (barley undersown with grass-clover -  4 years of grass-clover -  spring barley/catch crop) and another represents further away (barley undersown with grass-clover, 2 years of grass-clover -barley/catch crop - maize/catch crop - lupin/catch crop). In each of the crop rotations was made five treatments concerning grazing/cutting strategy and manure application. Results shows that herbage production was high in year 1-4 of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16291/1/16291.pdf

Nitrogen dynamics in temporary multi-species grasslands
Provedor de dados: Organic Eprints
Autores: Dhamala, NR.
Plant diversity is often low in high-yielding temporary grasslands in Europe, with grass-clover being the traditional dominant mixture. Non-leguminous dicot forage herbs have potential as complementary species to traditional grassland species. Chicory (Cichorium intybus L.), ribwort plantain (Plantago lanceolata L.) and caraway (Carum carvi L.) are the three non-leguminous dicot forage herbs (hereafter called forbs) that have attracted most attention. Another form of grassland production of increasing interest is the practice of growing species mixtures containing only forage legumes for low-input production of biomass with high protein content. In this study, grassland nitrogen (N) dynamics were studied in a sward that included the forbs chicory, plantain...
Tipo: Thesis
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32976/1/A%20Complete%20PhD%20Thesis-Nawa%20Raj%20Dhamala%20%2819.04.2017%29-%20%20Sumitted%20to%20GSST.pdf

20 Jahre Modellbetrieb für Ökolandbau in Müncheberg.  Teil 1: Entwicklung von Humus- und Nährstoffgehalten
Provedor de dados: Organic Eprints
Autores: Bachinger, Johann; Bloch, Ralf; Reckling, Moritz; Stein-Bachinger, Karin.
Acht Felder der Versuchsstation des ZALF in Müncheberg in Nordostdeutschland wurden 1993 als Modellbetrieb mit einer Leguminosen-betonten Fruchtfolge auf Ökologischen Landbau umgestellt. Je Feld wurde 1995 ein Monitoringversuch mit je  5 Ernte- bzw. Beprobungsparzellen angelegt. Neben Ernteerhebungen erfolgte eine jährliche Krumenbeprobung zur Untersuchung der Entwicklung der Gehalte an organischem Kohlenstoff (Corg) und Stickstoff (Norg) sowie der P- und K-Verfügbarkeit. Eine deutliche Zunahme der Corg-Gehalte zeigte sich nur auf den Flächen mit Texturklasse Sand. Dagegen stiegen die Norg-Gehalte auch auf den besseren Böden, allerdings in geringerem Maße, an. Die P-Verfügbarkeit pegelte sich nach einem anfänglichen Rückgang auf Werte der Versorgungsstufe...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Soil.
Ano: 2015
URL: http://orgprints.org/27175/1/27175_bachinger.pdf

Catch crops and green manures as biological tools in nitrogen management in temperate zones
Provedor de dados: Organic Eprints
Autores: Thorup-Kristensen, Kristian; Magid, Jacob; Jensen, Lars Stoumann.
The review deals with the effects of nitrogen catch crops or green manures on the N dynamics of agricultural systems. The mechanisms of their effects are discussed, and it is discussed how they can be used to achieve the agricultural and environmental goals of N management.
Tipo: Book
Palavras-chave: Nutrient turnover; Soil quality; Production systems.
Ano: 2003
URL: http://orgprints.org/107/4/107.pdf

Outdoor production of slaughter pigs requires an optimized management to mitigate N pollution
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Hermansen, J.E.
In Danish outdoor pig production the sows are usually kept on grassland, while their progeny are transferred at weaning to indoor housing with access to an outdoor concrete pen.    It may seem paradoxical that a large part of meat consumed from outdoor systems comes from pigs that during the majority of their life have been prevented from natural behaviour such as rooting, digging and grazing. The explanation is the drawbacks of rearing growers outdoors including huge space demand, high work expenditure, high feed consumption and high environmental costs due to nutrient losses to aquifers and the atmosphere caused by high nutrient load and difficulty maintaining grass cover. However, it may be questioned if pigs reared indoors comply with consumers’...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/5482/1/5482.PDF

Symbiotic nitrogen fixation and N-transfer in a grass-white clover mixture
Provedor de dados: Organic Eprints
Autores: Vinther, Finn P.
Symbiotic N2 fixation (SNF) and transfer of fixed N from clover to grass in a grass-white clover mixture was measured during two years using 15N isotope dilution techniques. White clover derived from 87 to 99% of its N from the atmosphere. The total SNF ranged from 150 to 277 kg N ha-1 yr-1, which corresponded to 34-45 mg N fixed per gram of white clover dry weight. The transfer of fixed N from clover to grass corresponded to approximately 10 kg N ha-1 yr-1.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality; Soil biology; Pasture and forage crops.
Ano: 2000
URL: http://orgprints.org/178/1/FPV415_N%2Dfix_Aalborg_2000.pdf

Phosphordüngewirkung von Recyclingdüngemitteln
Provedor de dados: Organic Eprints
Autores: Möller, Kurt.
Phosphorus (P) is an essential element for all living organisms, and at the current rate of extraction, global reserves will be exhausted in the next few centuries. Often, P balances calculated for organically managed arable systems indicate that more P is removed with the products than applied as fertilizer. Within the IMPROVE-P consortium, the relative P fertilizer effectiveness of most recycling P fertilizers was assessed. Most organic P fertilizers with exception of meat and bone meal have a relatively high relative P effectiveness. Struvite obtained from chemical approaches for P recycling also showed high P effectiveness, while incineration and most other thermal approaches downgraded the final fertilizer value by the loss of organic matter, nitrogen...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31901/1/Phosphord%C3%BCngewirkung%20von%20Recyclingd%C3%BCngemitteln.pdf

Grønngjødsel i økologisk korndyrking - Resultat fra Byggro-prosjektet
Provedor de dados: Organic Eprints
Autores: Hansen, Sissel; Frøseth, Randi Berland.
Helårs grønngjødsel brukes for å bedre jordas fruktbarhet og sanere ugras. Det er mye næring i en slik grønngjødseleng. Mest mulig av denne næringen må være tilgjengelig når kornet trenger det. Dette for å sikre gode avlinger og unngå forurensing.  I Byggro-prosjektet har vi prøvd ut ulik handtering av helårsgrønngjødsel. Etter slått ble grønnmassen enten hakket og tilbakeført, fjernet eller fermentert i biogassreaktor og delvis tilbakeført som gjødsel til korn neste vår.
Tipo: Report
Palavras-chave: Nutrient turnover; Environmental aspects; Farm nutrient management.
Ano: 2013
URL: http://orgprints.org/30855/1/Tema%20Nr.%202%20Mai%202013%20Gr%C3%B8nngj%C3%B8dsel%20i%20%C3%B8kologisk%20korndyrking%20Resultat%20fra%20Byggro%20prosjektet%20Sissel%20Hansen%20og%20Randi%20B.%20Fr%C3%B8seth.pdf

Dobbeltdyrkning og plantebaserede gødninger til dyrkning af rækkeafgrøder - DoubleCrop
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne Lakkenborg.
En samlet præsentation af DoubleCrop-projektet, herunder ideen om dobbeltdyrkning, anvendelse af plantebaserede gødninger, vinterjorddække og fokus på jordens frugtbarhed baseret på principperne for bæredygtige intensive økologiske dyrkningssystemer.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover; Soil tillage; Air and water emissions; Vegetables; Root crops.
Ano: 2019
URL: http://orgprints.org/35467/1/Poster%20skabelon_Statusm%C3%B8de_2019%20%28002%29_DoubleCrop.pptx

Dynamic composting optimization through C/N ratio variation as a startup parameter
Provedor de dados: Organic Eprints
Autores: AZIM, Khalid; OUYIHYA, Khalid; AMELLOUK, Aomar; PERISSOL, Claude; THAMI ALAMI, Imane; SOUDI, Brahim.
Different organic wastes (waste of tomato leaves and stems, sheep manure, olive mill waste and melon waste) were mixed with different proportions for different C/N ratio to make better use of tomato waste as it constitutes the majority of horticultural waste in the Souss-Massa region (south-western of Morocco). The objective of this study was to evaluate the effect of C/N ratio on the physicochemical parameters during aerobic composting process (temperature, relative humidity, pH, EC...), and the quality of the compost. The effect of each produced compost was also tested by its incorporation at different rates into sandy soil. The four studied C/N ratios (treatments) were: C/N=25; C/N=30; C/N=35 and C/N=40. Results revealed that the treatment C/N=35 has...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/23554/1/23554_MM.pdf

Improving green manure quality with phosphate rocks in Ontario Canada
Provedor de dados: Organic Eprints
Autores: Arcand, M M; Lynch, D H; Voroney, R P; van Straaten, P.
Phosphate rock (PR) was applied to one conventional and two organic dairy fields and planted with buckwheat (Fagopyrum esculentum) as a green manure crop. In total, five types of PR were applied at three application rates in order to determine the yield, concentration of P in the aboveground tissue and the P uptake of buckwheat. It was found that PR of relatively high carbonate substitution and small particle diameter could increase buckwheat tissue concentrations to a quality such that mineralization of the buckwheat mulch could occur. Buckwheat mulch and residual PR increased soil P flux as determined by anion exchange membranes in situ in the following spring. This provides evidence that buckwheat of high P quality has the potential to supply P to a...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/10253/1/Improving_green_manure_quality_with_phosphate_rocks_in_Ontario_Canada.pdf

SOIL ENZYME ACTIVITIES RECOVERY AFTER ORGANIC TREATMENTS OF DEGRADED AREAS WITHIN VINEYARDS
Provedor de dados: Organic Eprints
Autores: Lagomarsino, A.; Agnelli, A.E.; Fulchin, E.; Giffard, B.
Soil enzymes were used to assess the impact of different treatments applied in four farms, each one with three vineyards as replicates, on soil functionality. 8 enzymes related to C, N, S and P cycling were measured and functional diversity indexes were estimated. Three treatments were compared: compost, green manure and dry mulching with respect to degraded and non-degraded soil. The four vineyards showed different enzymatic patterns and response to treatments. Vineyards with the largest difference between degraded and non-degraded soil have benefited more largely from the treatments. In particular, dry mulching seemed to be more effective than green manure or compost, with the exception of San Disdagio. However, the effect the short term.
Tipo: Journal paper
Palavras-chave: Soil quality; Soil biology; Composting and manuring; Nutrient turnover; Soil tillage; Soil.
Ano: 2018
URL: http://orgprints.org/33466/1/7891-25954-1-PB.pdf

Auswirkungen reduzierter Produktionsintensität auf Futterqualität und ökologische Effekte
Provedor de dados: Organic Eprints
Autores: Taube, Friedhelm; Wachendorf, M.; Loges, R.
Zusammenfassung:     Aus aggregierter Sicht der pflanzenbaulichen  Leistung wie des abiotischen Ressourcenschutzes ist festzuhalten:   1) der Futterbau auf den sandigen Standorten der Geest ist bei reduzierter N-Intensität durch geringe Grenzertragsverluste, aber hohe Reduktionen der Nitratauswaschungen geprägt; im Marktfruchtbau des östlichen Hügellandes herrschen inverse Beziehungen vor.  2) Ein Flächenbilanzsaldo von +20 bis +40 kg/ha/Jahr (plus "unvermeidbare gasförmige Verluste") ist als Grenzbereich der guten fachlichen Praxis auf den Futterbaubetrieben der Geest nur durch erhebliche Reduktionen der Bewirtschaftungsintensität zu erreichen. Auf den Marktfruchtbetrieben des östlichen Hügellandes besteht dagegen eine schwache Beziehung zwischen dem...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2001
URL: http://orgprints.org/2367/1/handbuch%2Dkein%2DDokument.pdf

Integrating maize and triticale in grass/clover based dairy systems:  examining yields and autumn soil nitrate levels
Provedor de dados: Organic Eprints
Autores: Pinxterhuis, Ina; Boer, H. de; Eekeren, N. van; Stienezen, M.W.J.
To establish N-efficient crop rotations with perennial ryegrass/white clover, maize and triticale, a 9-year field experiment was executed on an organic experimental farm in the Netherlands. Crop rotations with different levels of slurry (dairy effluent from the free-stall barn, average dry matter content of 7%) application were tested for dry matter (DM) yield, N yield, soil mineral N in autumn, soil organic matter and soil organic N. Maize cropping and slurry application both increased annual DM yield. However, the second year of grass/ clover following maize, maize itself and slurry applications each resulted in higher soil mineral N in autumn, increasing the risk of nitrate leaching losses. A rotation of 4 years of grass/clover, 2 years of maize and 1...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover; Soil.
Ano: 2013
URL: http://orgprints.org/26765/1/2816.pdf

An approach to include soil carbon changes in life cycle assessments
Provedor de dados: Organic Eprints
Autores: Petersen, B.M.; Knudsen, Marie Trydeman; Hermansen, J.E.; Halberg, Niels.
Globally, soil carbon sequestration is expected to hold a major potential to mitigate agricultural greenhouse gas emissions. However, the majority of life cycle assessments (LCA) of agricultural products have not included possible changes in soil carbon sequestration. In the present study, a method to estimate carbon sequestration to be included in LCA is suggested and applied to two examples where the inclusion of carbon sequestration is especially relevant: 1) Bioenergy: removal of straw from a Danish soil for energy purposes and 2) Organic versus conventional farming: comparative study of soybean production in China. The suggested approach considers the time of the soil CO2 emissions for the LCA by including the Bern Carbon Cycle Model. Time...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions; Soil; Research methodology and philosophy; Environmental aspects.
Ano: 2013
URL: http://orgprints.org/22732/7/22732.pdf

Mikromineralinnhold i jord og planter - mikromineralforsyning til drøvtyggere i økologisk landbruk
Provedor de dados: Organic Eprints
Autores: Strøm, Turid; Hansen, Sissel; Govasmark, Espen.
For alle mineralene unntatt klor var det et høgere innhold i 2. slått enn i 1. slått. Flere av planteprøvene viste så lavt innhold av ett eller flere makromineral at det antagelig reduserte avlingsnivået. Ut fra mineralbehovet hos sau og storfe viste plante- og blodprøver at flere av besetningene hadde liten tilførsel av svovel, fosfor, selen og E-vitamin, mens tilførselen av magnesium, kobolt og kopper var tilfredsstillende. Videre bearbeidelse av innsamla datamateriell og utprøving av ulike selentilskudd til jord og planter vil danne grunnlaget for å trekke endelig konklusjoner i forskningsprogrammet, samt utarbeide praktiske råd om mineraltilførsel til planter og drøvtyggere i økologisk landbruk.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Dairy cattle; Sheep and goats; Feeding and growth.
Ano: 2003
URL: http://orgprints.org/6927/1/Mineral%2DSIP_til_Kvithamardagene__22.01.03_m_fig.doc

Potentials of Two Brewery Waste-Based Composts on Soil  Fertility for Amaranth (Amaranthus Caudatus) and Jackbean  (Canavalia Ensiformis) Intercrop
Provedor de dados: Organic Eprints
Autores: AdeOluwa, O.O.; Thomas, E.Y.; Bello, A; Joshua, B.
The need for an increased production of vegetables to meet the human dietary necessitated a research in the use of different organic resources, for improving the soil fertility as well as improved yield and quality of amaranth. Thus, this report investigated the potential of two brewery waste based composts on soil fertility for amaranth (Amaranthus caudatus) and Jackbean (Canavalia ensiformis) intercrop. Six treatmentsL Compost IBBW1 (Ibadan brewery waste-based compost Grade A), Compost IBBW2 (Ibadan brewery waste-based compost Grade B), Compost IBBW1+ Jackbean (JB), Compost IBBW2+ Jackbean (JB), Jackbean and control (no fertilizer) were used. The compost was applied at the rate of 100 kgN/ha. The experiment was laid in a randomized complete block design...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/28885/1/POTENTIALS%20OF%20TWO%20BREWERY%20WASTE3rd%20Africa%20Organic%20Conference.docx

Mineralization of 15N-labelled sheep manure in soils of different texture and water contents
Provedor de dados: Organic Eprints
Autores: Thomsen, I. K.; Schjønning, P.; Christensen, B. T.
In order to investigate the effect of soil moisture and texture on C and N mineralization of applied organic matter, sheep faeces was sandwiched between two halves of intact soil cores and incubated at 20°C. The soils contained 10.8 (L1), 22.4 (L3) and 33.7% (L5) clay, respectively, and were drained to seven different matric potentials in the range –15 to –1500 hPa. Evolution of CO2-C was determined during four weeks of incubation. Contents of NO3-N, 15N and microbial biomass N were determined at the end of the incubation.  The net release of CO2-C from the faeces (estimated as the difference between soils with and without faeces) and the total CO2-C evolution from soils with faeces was not related to soil moisture contents. Most CO2-C evolved from faeces...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/271/1/HarmTaskBf%C3%A6ces_rev1.doc

Application of processed organic municipal solid waste on agricultural land - a scenario analysis
Provedor de dados: Organic Eprints
Autores: Bruun, Sander; Hansen, Trine L.; Christensen, Thomas H.; Magid, Jakob; Jensen, Lars S.
Source separation, composting and anaerobic digestion, with associated land application, are increasingly being considered as alternative waste management strategies to landfilling and incineration of municipal solid waste (MSW). Environmental life cycle  assessments are a useful tool in political decision-making about waste management strategies. However, due to the diversity of processed organic MSW and the situations in which it can be applied, the environmental impacts of land application are very hard to determine by experimental means. In the current study, we used the agroecosystem model Daisy to simulate a range of different scenarios representing different geographical areas, farm and soil types under Danish conditions and legislation. Generally,...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality.
Ano: 2006
URL: http://orgprints.org/9223/1/9223.pdf

Acúmulo de nitrogênio e fósforo no tecido de plantas anuais de inverno manejadas sob sistema plantio direto e sistema de cultivo convencional
Provedor de dados: Organic Eprints
Autores: PICCIN, R.; KAMINSKI, J.; CASALI, C.A.; CALEGARI, A.; GEBERT, F.H.; SARTORI, R.J.B.; GUBIANI, E.; ROSSATO, L.F.R.
O sistema de manejo pode afetar a disponibilidade de nutrientes para as plantas, em decorrência do sistema de rotação de culturas e da quantidade de resíduo vegetal presente na superfície do solo. O objetivo deste trabalho foi avaliar a quantidade de nitrogênio (N) e fósforo (P) acumulados no tecido vegetal de aveia preta, trigo, centeio, ervilhaca, nabo e tremoço azul, além de verificar seu estado nutricional de N e P. O experimento esta instalado no Instituto Agronômico do Paraná (IAPAR) em Pato Branco, Paraná, em um Latossolo Vermelho aluminoférrico. Em maio de 2011 os tratamentos foram semeados, sendo seis plantas de cobertura: trigo, aveia preta, centeio, ervilhaca, nabo forrageiro e tremoço azul cultivados sob Sistema Plantio Direto (SPD) e Sistema...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil tillage; Greenhouses and coverings; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/29926/1/2012%20-%20Piccin%20-%20Fertbio.pdf

Using legume-based mixtures to enhance the nitrogen use efficiency and economic viability of cropping systems.
Provedor de dados: Organic Eprints
Autores: Baddeley, J. A.; Döring, Thomas F.; Hatch, David; Marshall, Athole; Pearce, Bruce; Roderick, S; Stobart, Ron; Storkey, Jonathan; Watson, C.A.; Wolfe, Martin.
There is a pressing need to develop arable cropping systems that are both more efficient in their use of nitrogen (N) and more resilient to an increasingly variable and unpredictable climate. One potential solution is to use species-rich mixtures of grasses and legumes in the fertilitybuilding phase of a ley/arable crop rotation. These mixtures may reduce N losses and increase productivity of the following crop. They may also have other important benefits such as increased in-field biodiversity. In this project, legume and grass species with a range of tolerances to different environmental conditions, and with differing growth characteristics, are being grown individually and as a mixture across the UK, and their performance assessed.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2010
URL: http://orgprints.org/19774/1/SACSEPA2010JAB.pdf

Bilan phosphore du sol et fixation de l'azote dans fermes laitières biologiques de l'Ontario et de la Nouvelle-Écosse
Provedor de dados: Organic Eprints
Autores: Main, Michael; Lynch, Derek; Ward, Amanda; Voroney, Paul; Schneider, Kim; Juurlink, Shelly.
Les légumineuses sont une source importante d'azote (N) en production biologique. Toutefois, il est prouvé que de trop faibles intrants peuvent entraîner une carence de phosphore du sol (P) dans les fermes laitières biologiques (Roberts et coll., 2008), et une réduction possible du rendement des cultures et de la fixation de N par les légumineuses fourragères. La présente étude vise à évaluer le lien entre la dynamique du P du sol et la fixation de l’azote par les légumineuses en gestion biologique (BNF). L’étude a deux principaux sous-projets :  1. Étude sur le terrain de la concentration du P dans le sol, et rendement des légumineuses fourragères et fixation de N dans les fermes laitières de l’Ontario et de la Nouvelle-Écosse, Canada.  2. Études en...
Tipo: Report
Palavras-chave: Pasture and forage crops; Nutrient turnover; Farm nutrient management.
Ano: 2010
URL: http://orgprints.org/19552/1/OACC_Technical_Bulletin_2010%2D40_f_1.pdf

Studies on Soil fertility, Cow urine and Panchagavya levels on Growth and Yield of Maize
Provedor de dados: Organic Eprints
Autores: Devakumar, N.; Subha, S.; Rao, G.G.E.; ImranKhan, J.
The present study revealed that higher grain and stover yield, plant height and number of leaves in maize with panchagavya, cow urine but it was comparable to recommended fertilizer treatments at higher level (200% and 300%). It can be concluded that presence of rich plant growth substances, both major and micro nutrients, beneficial microbial population in organic liquid manures help to bring rapid changes in phenotypic characteristics of plants and also improves the growth and ultimately improve the productivity of the crops. Liquid organic manure like panchagavya could be prepared locally by farming community and obtain increased yield levels. Such practices would pave way to reduce use of external inputs and increase sustainability among organic...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/23358/1/23358%20N.%20Devakumar_OWC_research%20track%202014%20Panchagavya-1_MM.pdf

PlantyOrganic: Results 2013
Provedor de dados: Organic Eprints
Autores: Hospers-Brands, A.J.T.M.; Anema, D.; Bus, M.C.
2013 was the second year of the "PlantyOrganic" system development in practice. The six-year rotation is laid out and measurements took place at soil and crop. With the exception of the potatoes in 2013 all crops had the pre-crop as foreseen in the design. The fertilizers used were completely produced in the own system, as foreseen in the system design. The amounts of nitrogen applied were about 45 % higher than in the design. Soil nitrogen is measured and used as input in the nitrogen model NDICEA. There was a sufficient match between measured and calculated level of soil mineral nitrogen. The crops performed well, with a high yield in carrots and oats, and a disappointing yield in wheat. In wheat nitrogen was limiting for the yield, we do not yet have a...
Tipo: Report
Palavras-chave: Nutrient turnover; Air and water emissions; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/26064/1/2892.pdf

Kinetics of microbial phosphorus uptake in cultivated soils
Provedor de dados: Organic Eprints
Autores: Oehl, Fritz; Oberson, Astrid; Probst, Mirijam; Fliessbach, Andreas; Roth, Hans-Rudolf; Frossard, Emmanuel.
Knowledge about the role of microorganisms in P cycling at conditions of constant soil respiration rates and constant size of microbially bound P is lacking. To study the kinetics of microbial P uptake and cycling under such conditions, soils differing in biological activity were 33PO4 labelled by introducing a carrier-free tracer solution and incubated for 56 days. The 33PO4 incorporation into the fraction of microbial P releasable by chloroform treatment (Pchl) was assessed and the isotopic composition [=specific activity (SA); SA=33PO4/31PO4] of Pchl and soil solution P compared. Soils were taken from a 20-year-old field experiment including a nonfertilised control (NON), a minerally fertilised conventional (MIN) and two organic farming systems...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology; Soil quality.
Ano: 2001
URL: http://orgprints.org/2934/1/oehl%2Det%2Dal%2D2000%2Dmicrobial%2Dphosphorus.pdf

Auswirkungen mehrjähriger ökologischer Bewirtschaftung auf ausgewählte Bodeneigenschaften, dargestellt am Beispiel des Versuchsfeldes Gülzow
Provedor de dados: Organic Eprints
Autores: Kahle, Petra; Baum, Christel; Borchwardt, Monika.
The effects of ecological vs. conventional farming on several biological, chemical and physical soil properties were investigated at the arable test site Gülzow (Northeast Germany). After ten years of ecological farming increased activities of dehydrogenase, β-glucosidase and alkaline phosphatase in the soil were measured. Low effects on the chemical soil properties like content of Corg, Nt and soil organic matter and no significant effects on physical soil properties like density, porosity and water retention were observed.   --  (Sprache des Volltextes: Deutsch)
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology; Soil quality.
Ano: 2004
URL: http://orgprints.org/5126/1/h33%2D04.pdf

Dyrkning i planterester giver mindre ukrudt giver mindre ukrudt
Provedor de dados: Organic Eprints
Autores: Rystedt, Lotte.
News release from the Danish field trial of SoilVeg 2017
Tipo: Web product
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage; Vegetables.
Ano: 2017
URL: http://orgprints.org/33594/1/DCA%20newsletter%2020171120%20Dyrkning%20i%20planterester%20giver%20mindre%20ukrudt.pdf

Wirkung verschiedener organischer Mulchmaterialien auf den Nährstoff- und Wasserhaushalt des Bodens - Quantifizierung der Bedeutung für den ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Müller, Siegfried.
In mehreren Gefäß- und Feldversuchen sowie Versuchen in Praxisbetrieben (2002/03) und einem langjährigen Feldversuch (seit 1995) ohne Bepflanzung wurde der Einfluss des Mulchens auf den Wasser- und Nährstoffhaushalt sowie auf „Nebeneffekte“ untersucht. In den Feldversuchen erfolgte Herbst- und Frühjahrsausbringung von Kompost, Stroh, Hackschnitzel, Rinde und Gras im Vergleich zur ungemulchten Fläche bei Bepflanzung und ohne gärtnerische Kulturen. In den Gefäßversuchen (mit und ohne Bebauung) wurden die genannten Materialien obenauf gebracht bzw. eingearbeitet und mit der Kontrolle (ungemulcht) verglichen. Im Ergebnis der Versuche ist folgende Quantifizierung für Wasser und Stickstoff möglich:  Unabhängig vom Mulchmaterial wird im Mittel von acht Jahren der...
Tipo: Report
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/17201/1/17201%2D02OE565%2Dfh_erfurt%2Dmueller%2D2003%2Dmulchmaterialien.pdf

Effects of long  term  application of compost and poultry manure on soil quality of citrus orchards in Southern Italy.
Provedor de dados: Organic Eprints
Autores: Canali, S.; Trinchera, A.; Intrigliolo, F.; Pompili, L.; Nisini, L.; Mocali, S.; Torrisi, B.
A six-year study was carried out in an organically managed orange orchard located in Sicily (Southern Italy) to assess the effect of compost and organic fertilizers utilisation on soil quality. Adopting a randomized-block experimental design with three replicates, four treatments were carried out. In treatments 1 and 2, two different composts (C1 from distillery by products and C2 from livestock wastes) were applied. The plots of treatment 3 were fertilized using dried poultry manure. The control  treatment was fertilized with mineral/synthetic fertilizers. In order to verify the hypothesis that composts and organic fertilizers improve soil fertility, soil quality was evaluated by selecting dynamic soil parameters, as indicators linked to C and N cycles....
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Poultry; Soil biology; Fruit and berries; Composting and manuring.
Ano: 2004
URL: http://orgprints.org/7901/1/Canali_et_al.pdf

Dikväveoxidemissioner från ekologisk odling styrda av kväveeffektiviteten i systemet
Provedor de dados: Organic Eprints
Ger ekologisk odling mer eller mindre emission av dikväveoxid än annan odling, och vad är det som påverkar emissionens storlek? För att få kunskap om storleken på emissionen och vad som styr den krävs fältmätning och arbete med modellering. Två motstridiga hypoteser kan formuleras för förluster från ekologisk odling: 1) större förluster än i odlingssystem med handelsgödsel pga fel "timing" mellan tillgängligt N och grödans behov, eller 2) lägre emissioner pga lägre N-flöde i systemet.                                I projektet ska vi 1) kvantifiera emissioner och kväveutlakning i relation till kväveutnyttjande i växtföljder med gröngödslingsgröda 2) kvantifiera nyckelprocesserna som styr utlakning, produktion och emission av kväveoxider, dvs. grödors...
Tipo: Project description
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2023

Legume-based catch crops inprove N-supply without increasing the N2O emission
Provedor de dados: Organic Eprints
Autores: Li, X.; Sørensen, P.; Petersen, S.O.; Olesen, J.E.
Legume-based catch crops (LBCCs) may be an important source of nitrogen (N) in organic crop rotations since they are capable of taking up N both from the soil and from the atmosphere via biological N fixation (BNF). Consequently, they may help improve the crop yield through enhancing soil fertility and crop N supply. On the other hand, the legume-based catch crops may also have a negative impact on the climate as they may enhance the emissions of nitrous oxide (N2O), which is a powerful greenhouse gas.     Therefore, the findings from two research projects HighCrop (Organic RDD 2) and Legume Future (EU-FP7) are promising, as they show that a higher level of N2O emission is not necessarily the consequence of growing LBCC.
Tipo: Web product
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/28938/1/28938.pdf

Organik Kivi Üretiminde Toprak Düzenleyicilerin ve Organik Materyallerin  Verim ve Bazı Meyve Özellikleri Üzerine Etkileri
Provedor de dados: Organic Eprints
Autores: Ozyazıcı, Gulen; Ozdemir, Osman; Ozyazıcı, Mehmet Arif.
Bu çalışma, Samsun Toprak ve Su Kaynakları Araştırma Enstitüsü Deneme İstasyonunda, kivi üretiminde, yöresel organik artık olan fındık zurufunun (taze ve kompost hali) organik ticari gübrelerin yerine ikame edilme durumunu ve kullanılan miktarın azaltılıp azaltılamayacağını ortaya koymak amacıyla 2008-2009 yıllarında yürütülmüştür. Toprak düzenleyici olarak klinoptilolit ve leonardit, organik ticari gübre  (biofarm), yöresel atık olan fındık zurufunun iki farklı kullanım şekli (taze ve kompost) araştırmanın materyalini oluşturmaktadır. Araştırma, tesadüf bloklarında bölünmüş parseller deneme desenine göre          3 tekerrürlü olarak yürütülmüştür. Fındık zurufu ve biofarm, azot içerikleri göz önüne alınarak, toprak analiz sonuçlarına göre parsellere...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2010
URL: http://orgprints.org/35129/1/%C3%96zyaz%C4%B1c%C4%B1.pdf

Soil functionality assessment in degraded plots  of vineyards
Provedor de dados: Organic Eprints
Autores: Priori, S.; Lagomarsino, A.; Agnelli, A.E.; Valboa, G.; Castaldini, M.; Pellegrini, S.; Simoni, S.; D'Avino, L.; Gagnarli, E.; Guidi, S.; Goggioli, D.; Landi, S.; D'Errico, G.; Perria, R.; Puccioni, S.; Leprini, M.; Zombardo, A.; Storchi, P.; Costantini, E.A.C.
Land transformation to adapt fields to mechanization in perennial crop farming is a common practice which includes land levelling, deep ploughing, stone-breakage and clearing, application of fertilizers and amendments. Manipulation of the natural soil profile along its entire depth can severely disturb the naturally existing chemical  physical,biological and hydrological equilibrium (Costantini and Barbetti, 2008; Costantini et al., 2013). The most common effects of the land transformation are mixing of soil horizons and soil truncation, which result in reduction of soil depth and available water, organic matter depletion, enrichment of calcium carbonate content in the topsoil,imbalance of some element ratio, and decline in the activity and diversity of...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Soil; Biodiversity and ecosystem services; Landscape and recreation; Environmental aspects.
Ano: 2016
URL: http://orgprints.org/30955/1/Atti_Congresso_SISS2015.pdf

Effects of green manure storage and incorporation methods on nitrogen release and N2O emissions after soil application
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Sørensen, Peter; Petersen, Søren O.; Ma, Xiuzhi; Ambus, Per.
More efficient use of green manure-derived nitrogen (N) may improve crop yields and reduce environmental impacts in stockless organic arable farming. In this 3-month incubation study, we tested a new strategy where green manure leys are harvested and preserved until the following spring either as compost mixed with straw or as silage of harvested ley biomass. Grass-clover compost or silage was soil-incorporated by either simulated ploughing (green manure placed at 15 cm depth) or harrowing (green manure mixed into the upper 5-cm soil horizon) in order to assess treatment effects on net release of plant-available N, nitrous oxide (N2O) fluxes, and soil respiration. Grass-clover silage provided the highest net N release with similar results for the two...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2014
URL: http://orgprints.org/25158/7/25158.pdf

Improving Soil Structure and Nitrogen Use Efficiency by GPS-controlled Precision Tillage Technology in Organic Farming
Provedor de dados: Organic Eprints
Autores: Zanen, Ir. M.; Koopmans, Dr. Ir. C.J.
A field experiment was conducted to determine the effects of tillage technique (GPS-controlled traffic system and traditional tillage) and level of fertilization (farmers’ practice or phosphate equilibrium) on yield, soil structure and nitrogen use efficiency. Manure inputs could be seriously reduced without yields being diminished during the first three years of the intensive crop rotation. Results suggest that an improved soil structure under GPS-controlled precision tillage enhances nitrogen use efficiency.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil; Soil quality.
Ano: 2008
URL: http://orgprints.org/11980/1/Zanen_11980_ed.doc

Plant-availability of catch crop S following spring incorporation
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Thorup-Kristensen, K.; Askegaard, M.
Catch crops might reduce sulphate leaching and thereby increase the overall S use efficiency in crop rotations. At 2 experimental sites in Denmark (a sandy loam and a coarse sand) S uptake of catch crop species was measured. Furthermore net release of S following incorporation of this material  (S contents 0.13-1.03%, C:S ratios of 40-329 and lignin content of 1-10.8%) was investigated in a pot experiment with spring barley in sandy soil. The catch crops showed huge differences in their ability to sequester S. The best catch crops (legumes on sandy loam), sequestered 10-12 kg S ha-1 and the poorest catch crops (ryegrass and sorrel on coarse sand), sequestered less than 3 kg S ha-1. The S mineralisation rates were highest for crucifers (57-85% of total S...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/3173/1/3173.pdf

Productivity and N-leaching in organic dairy grass-arable crop rotations
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Askegaard, M; Søegaard, K.
Due to increasing size of Danish organic dairy farms uniform grazing of all cropped land becomes inexpedient due to long distance to the milking facilities. We investigated nutrient dynamics and feed production in two dairy crop rotations with internal differences in proportion of grazing and cutting. One six year crop rotation represents close to the farm buildings (barley [Hordeum vulgare L.] undersown with grass-clover [Lolium perenne L.–Trifolium repens L.] -  4 years of grass-clover -  spring barley/catch crop) and another represents further away (barley undersown with grass-clover, 2 years of grass-clover -barley/catch crop - maize [Zea mays L.]/catch crop - lupin [Lupinus angustifolius]/catch crop). In each of the crop rotations was made five...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/14641/1/27FA_Eriksen_el_al._final_paper.pdf

ESTOQUE DE CARBONO E NITROGÊNIO EM SOLO SOB SISTEMAS DE  MANEJO E CULTURAS DE INVERNO
Provedor de dados: Organic Eprints
Autores: Gubiani, E.
Soil organic matter (SOM) constitutes the largest reservoir of carbon (C) and nitrogen (N) of the earth's surface. In agricultural soils, the organic fraction is of great importance in maintaining soil quality, while contributing a small fraction. Thus, the adoption of soil management practices and cover crops are important to promote the C and N accumulation in the soil and consequently improve its quality. The no-tillage system (NT) as conservation practice improves the soil structure, water infiltration and increases the contribution of C and N in the soil by deposition of crop residue on the surface. Thus, the soil is kept constantly covered by organic residuce of plants during their vegetative stage. This study aims to evaluate the stocks of C and N...
Tipo: Thesis
Palavras-chave: Nutrient turnover; Soil tillage; Greenhouses and coverings.
Ano: 2015
URL: http://orgprints.org/29934/1/ELCI-GUBIANI.pdf

Soil organic phosphorus forms under different soil management systems and winter crops, in a long term experiment
Provedor de dados: Organic Eprints
Autores: TIECHER, T.; SANTOS, D.R.; CALEGARI, A.
Organic phosphorus (P) is an important source of phosphate for plants both in natural environments and in cultivated soils. Growing plants with high P recycling capacity may increase the importance of organic forms in phosphate availability mainly in undisturbed soils. The aim of this study was to evaluate the effect of long period of cultivation of different winter species under different soil management systems in the distribution of soil organic P forms, in the P content stored into the soil microbial biomass (SMB) and in the acid phosphatase enzyme activity. The experiment was established in 1986 with six winter treatments (blue lupine, hairy vetch, oat, radish, wheat and fallow) implanted in a Rhodic Hapludox in southern Brazil, under no-tillage...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil tillage; Soil; Greenhouses and coverings; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/29931/1/Tiecher_Soil%20Tillage_2012.pdf

If modelling modelling with Daisy
Provedor de dados: Organic Eprints
Autores: Pedersen, Anders.
Oral presentation in working group 5:  Buffer strips and catch crops: cosmetic or beneficial?  In most countries sufficient knowledge of catch crops has been acquired by farmers to apply them as a basic element of "Good Agricultural Practice". Buffer strips seem less known and applied. Various contributions point at adverse effects, such as increase in N leaching on buffered fields, overloading of buffer capacity and increase in denitrification. Hence, a major question to be discussed is how buffer strips should be designed and managed to achieve the desired effects whilst avoiding or minimising adverse effects? Another question is to what extent buffer strips should be accompanied by other measures, such as catch crop cultivation.    Convenors: Adrie van...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2005
URL: http://orgprints.org/7832/1/7832.pdf

Contribution of N from frequently chopped green manure to a succeeding crop of barley
Provedor de dados: Organic Eprints
Autores: Frøseth, Randi Berland; Hansen, Sissel; Bakken, Anne Kjersti.
The aim of the present work was to study to what extent N in mulched green manure herbage contributes to spring barley grain yield the subsequent year. The green manure herbage was either chopped and left on stubble (GML) or removed (GMR). On silty clay loam with spring incorporated green manure the subsequent barley grain yield was 10% higher with GML than with GMR. The additional grain N yield of 4 kg ha-1 with GML corresponded to only 3 % of N in above-ground green manure biomass. On loamy soil with late autumn incorporated green manure the treatments did not affect the grain yield the subsequent year. How large part of the N that was lost through leaching or gaseous emissions and how large part that was built into soil organic matter was not measured....
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2008
URL: http://orgprints.org/14240/1/Contribution_of_N_from_frequently_chopped_green_manure_to_a_succeeding_crop_of_barley.pdf

Ein Solitär wird 40 Jahre alt
Provedor de dados: Organic Eprints
Autores: Mäder, Paul; Krause, Hans-Martin; Fliessbach, Andreas.
Der weltweit einmalige Langzeitversuch „DOK“, der die drei Ackerbausysteme biologisch-dynamisch, organisch-biologisch und konventionell vergleicht, feiert Geburtstag.  Paul Mäder, Hans-Martin-Krause und Andreas Fliessbach fassen die spannendsten Ergebnisse zu Boden, Artenvielfalt, Klimawirkung, Ertrag und Effizienz aus 40 Jahren DOK zusammen.
Tipo: Newspaper or magazine article
Palavras-chave: Soil biology; Systems research and participatory research; Nutrient turnover.
Ano: 2019
URL: http://orgprints.org/36575/1/maeder-etal-2019-OEL04-p32-34pdf.pdf

N-Bedarf und N-Effizienz von Mischfruchtanbausystemen mit Ölpflanzen im ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Paulsen, Hans Marten; Schochow, Martin; Behrendt, Andrea.
Mixed cropping systems with oil crops are of growing interest in organic farming. They can offer agricultural advances like competition against weeds, support against lodg¬ing and buffering of yield fluctuations. The aim of the cultivation method is to gain additional oil yields for energy or feed purposes. The reported higher land-efficiency-ratios of those mixed cropping systems should lead to higher nutrient requirements. But it is unknown if the different crops just compete for rare soil nutrients or if comple¬mentary effects in mixed cropping systems lead to higher nutrient efficiency. In a field study N-contents in plants and N uptake of diverse mixed cropping systems were compared to sole cropping systems. In linseed (Linum usitatissivum) or false...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions.
Ano: 2007
URL: http://orgprints.org/9412/1/9412_Paulsen_Vortrag.pdf

Biomass production and N2-fixation in seven grass-legume mixtures
Provedor de dados: Organic Eprints
Autores: Rasmussen, J.; Søegaard, K.; Eriksen, J.
Inclusion of forage legumes in low-input grassland mixtures improves biomass production and soil fertility trough addition of nitrogen (N) from N2-fixation. The impacts of different mixture of legumes and companion grasses on the N production of the forage mixture have rarely been investigated under comparable soil and climatic conditions. We conducted a field experiment on a sandy soil at two nitrogen levels with seven two-species grassland mixtures: alfalfa (Medicago sativa), bird’s-foot trefoil (Lotus corniculatus), red clover (Trifolium pratense), or white clover (Trifolium repens) in mixture with perennial ryegrass (Lolium perenne), and white clover in mixture with meadow fescue (Festuca pratensis), timothy (Phleum pratense), or hybrid ryegrass...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2010
URL: http://orgprints.org/17882/4/17882.pdf

Optimalisatie bemesting Van Strien: Voortgang 2014
Provedor de dados: Organic Eprints
Autores: Hospers-Brands, A.J.T.M.; Strien, J. van.
Dit rapport bevat de resultaten van het vierde jaar van het project "Bedrijfsinterne Optimalisatie", en wel van het deelproject "Van Strien". Op diverse percelen zijn metingen uitgevoerd aan de bodem om de stikstof werking van maaimeststoffen in beeld te krijgen. Op perceel 1A (aardappelen in 2014) heeft de strook met maaimeststoffen 2,3 maal zo veel stikstof gekregen als de bedoeling was, als gevolg van een twee maal zo hoog drogestofgehalte als vooraf was ingeschat. Dit was echter niet terug te vinden in de gemeenten hoeveelheden N-mineraal in de bodem en in de gehele strook met maaimeststoffen was de opbrengst lager dan bij de standaard bemesting. Door een vroege Phytophthora aantasting moest er vroeg gebrand worde. Daardoor waren de opbrengsten zeer...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Soil.
Ano: 2015
URL: http://orgprints.org/30042/1/3041.pdf

Bağlarda toprak yapısını iyileştirme teknikleri kılavuzu
Provedor de dados: Organic Eprints
Autores: Tangolar, Semih; Priori, S.; D'Avino, L.
Guidelines for soil functionality restoration in degraded areas of vineyard (Turkish language)
Tipo: Teaching resource
Palavras-chave: Soil quality; Crop combinations and interactions; Soil biology; Composting and manuring; Nutrient turnover; Soil tillage; Soil; Biodiversity and ecosystem services; Viticulture.
Ano: 2018
URL: http://orgprints.org/33837/1/Guidelines_Resolve_soil_restoration_techniques_FRENCH.pdf

Græsproduktion og miljø på store økologiske kvægbrug
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Græsmarker af længere varighed, forbedret management, strategisk gødskning og artsblandinger er nøgleord, når den optimale balance mellem produktion og miljø skal findes på stadig større kvægbrug.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16296/1/16296.pdf

Organic farmers grow grassclover in nature areas to remove soil phosphate for development of specious rich grasslands
Provedor de dados: Organic Eprints
Autores: Timmermans, B.G.H.; Eekeren, N. van.
While worldwide the current reserves of phosphate rock are being exhausted, many agricultural and former agricultural soils in The Netherlands have been enriched by large quantities of phosphorus as a result of fertilization. In current nature development projects on former agricultural lands, it is thought that this phosphorus prevents development of target-nature types. Therefore nature organizations currently seek ways to remove it. We tested grassclover, organically managed by local farmers, as a tool to extract excessive soil phosphate from nature areas and reimport it into the mineral cycle agricultural farms.  In a small scale experiment we have shown that grassclover with potassium fertilization can remove more than twice the amount of soil...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions; Biodiversity and ecosystem services.
Ano: 2014
URL: http://orgprints.org/23958/1/23958%20timmermansandvaneekeren2014_MM.pdf

Fresh and residual phosphorus uptake by ryegrass from soils with different fertilization histories
Provedor de dados: Organic Eprints
Autores: Oberson, Astrid; Tagmann, Hans U.; Langmeier, Monika; Dubois, David; Mäder, Paul; Frossard, Emmanuel.
Organic farming largely depends on animal manure as a source of phosphorus (P) and the recycling of animal manure globally is becoming increasingly important. In a pot experiment, using radioactive P labeling techniques, we studied ryegrass uptake of P applied with animal manure and water soluble mineral fertilizer to soils that had been cropped for 22 years according to organic or conventional farming practices. The soils differed in P status and microbial activity. Labeling soil-available P also allowed assessing the uptake from residual P that remained in the soils because of their different fertilization histories. On each soil, recovery of fresh manure P in four harvests of ryegrass shoots was lower than recovery of mineral P. It ranged from 24% to...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2010
URL: http://orgprints.org/25683/1/Oberson%20et%20al%202010%20PlantSoil%20P%20fertilizers%20DOK%20soils.pdf

Des bilans de phosphore majoritairement négatifs pour les systèmes de grandes cultures biologiques sans élevage en Midi-Pyrénées.  Quels impacts sur le phosphore biodisponible des sols et l’état de nutrition des cultures ?
Provedor de dados: Organic Eprints
Autores: COLOMB, Bruno; Jouany, Claire; Prieur , Loic.
Soil phosphorus (P) fertility management in organic cropping systems is a debated issue in the general context of decreasing resources in a near future. A survey showed that in Midi-Pyrenees a majority of stockless organic cropping systems present overdrawn P balances. We investigated the impacts of P balances on the soil plant available P and nutrition status on the long-term field experiment of La Hourre (CREAB, Auch, France), which is representative of rainfed systems set on clayey calcareous soils. The changes in soil plant available P were monitored between 2002 and 2012 using P Olsen soil test. The results specified the declining rate of P availability in time and according to the amplitude of the negative balance. The levels of soil available P did...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil.
Ano: 2013
URL: http://orgprints.org/26231/1/Colomb_2013_CIAG_Vol32.pdf

From N2 fixation to N2O emission in a grass-clover mixture
Provedor de dados: Organic Eprints
Autores: Thyme, Mette; Ambus, Per.
In organic dairy farming, a major N input to the plant-soil system comes from biological N2 fixation by pasture legumes, but knowledge is sparse on how much of the fixed N2 is lost from the pastures as N2O. Nitrifying and denitrifying bacteria are the main contributors to the N2O production in soils.     Currently, no contribution from biological N2 fixation in legume pastures is included in the national N2O inventories, partly because of uncertainties in quantifying the N2 fixation in the pastures (Mosier et al., 1998). According to the guidelines issued by The Intergovernmental Panel on Climate Change (IPCC), inventories for N2O emissions from agricultural soils should be based on the assumption that 1.25 % of added N is emitted as N2O (IPCC, 1997). The...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Pasture and forage crops; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/4147/1/4147.pdf

Kløvergræs - management bestemmer udbyttet i din mark
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Søegaard, K.; Askegaard, M.
Kløvergræsudbyttet påvirkes markant af benyttelse (afgræsning/slæt), botanisk sammensætning og gødningstilførsel, og i mindre omfang af græsmarkens alder
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16292/1/plk09_res_n2_1_j_eriksen.pdf

Soil Fertility and Biodiversity in Organic Farming
Provedor de dados: Organic Eprints
Autores: Mäder, Paul; Fliessbach, Andreas; Dubois, David; Gunst, Lucie; Fried, Padruot; Niggli, Urs.
An understanding of agroecosystems is a key to determining effective farming systems. Here we report results from a 21-year study of agronomic and ecological performance of biodynamic, bioorganic, and conventional farming systems in Central Europe. We found crop yields to be 20% lower in the organic systems, although input of fertilizer and energy was reduced by 34 to 53% and pesticide input by 97%. Enhanced soil fertility and higher biodiversity found in organic plots may render these systems less dependent on external inputs.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology; Biodiversity and ecosystem services.
Ano: 2002
URL: http://orgprints.org/5514/1/Maeder%2D2002%2DScience%2DDOC%2DTrial.pdf

Agro-Environmental Management,  Nutrient cycling and Environmental Management  Experimental exercises at Årslev Research Centre  26.-27. Sept. 2017
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne Lakkenborg.
Programme from experimental exercises on the Nutrient Cycling and Environmental Management course (10 ECTS) at the master line Agro-Environmental Management educations at AU. During the exercises soil was sampled from the SoilVeg trial and analysed and the trial was presented.
Tipo: Teaching resource
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage; Vegetables.
Ano: 2017
URL: http://orgprints.org/33591/1/Program%20EE%20Nutrient_Cycling_%C3%85rslev%20Master%20Science%2010%20ECTS%20course.pdf

Liberação de Fósforo de Resíduos de Plantas de Cobertura Cultivadas em Latossolo Vermelho Sob Sistema Plantio Direto por Longa Duração
Provedor de dados: Organic Eprints
Autores: CASALI, C.A.; KAMINSKI, J.; SANTOS, D.R.; CALEGARI, A.; TIECHER, T.; PICCIN, R.; BELLINASO, R.J.S.
O objetivo do presente trabalho foi avaliar a liberação de P a partir da decomposição dos resíduos de plantas de cobertura. Em setembro de 2011, em um experimento instalado em 1986 sobre um Latossolo Vermelho aluminoférrico, no IAPAR, Pato Branco, PR, foram coletadas amostras da parte aérea das plantas de cobertura tremoço azul, ervilhaca comum, aveia branca, nabo forrageiro, centeio e trigo, manejadas sob SPD. Mediu-se a decomposição dos resíduos das plantas e a liberação de P por meio de bolsas de decomposição de poliéster, que foram coletadas aos 0,7,14,28,56 e 112 dias após o manejo das plantas. Avaliaram-se as taxas de decomposição e o tempo de meia vida da MSPA e do P. O delineamento estatístico utilizado foi de blocos casualizados com três...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil tillage; Greenhouses and coverings; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/29927/1/2012%20-%20Casali%20-%20RSBCS.pdf

Effects of digestate from anaerobic fermented cattle slurry and plant materials on soil microbiota and fertility
Provedor de dados: Organic Eprints
Autores: Johansen, Anders; Carter, Mette S.; Jensen, Erik Steen; Hauggaard-Nielsen, Henrik; Ambus, Per.
Soil from the Højbakkegård experimental (BioConcens) field  was amended with nothing (control), each of two anaerobic digested (AD) materials (mixture of AD cattle manure and maize, mixture of AD cattle manure and cut off grass-clover material), raw cattle manure, and grass-clover in five individual treat-ments. The materials were incorporated homogeneously into the soil and sampled destructively at 0, 1, 3 and 9 days after incorporation. Besides, experiments were performed to follow the turnover of these materials, measured as accumulated respiration over a longer period. Measures included available organic soil carbon (cold- and hot-water extractable), soil mineral nitrogen concentration, soil pH, accumulated respiration over a two-week period, emission...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions; Biodiversity and ecosystem services; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/18894/7/18894.pdf

Phosphat-Mobilisierung durch Haupt- und Zwischenfrüchte nach Düngung von weicherdigem Rohphosphat im ökologischen Landbau
Provedor de dados: Organic Eprints
Im Ökologischen Landbau ist weicherdiges Rohphosphat als Phospatdüngemittel zugelassen. Die Effizienz von Rohphosphatdüngemitteln wird insbesondere durch den pH-Wert des Bodens sowie die Phosphat- und Ca-Konzentration der Bodenlösung beeinflusst. Zur Förderung und Stabilisierung der Bodenfruchtbarkeit werden die Böden gekalkt, so dass der pH-Wert mineralischer Böden meistens über 6 liegt. Kalkung dient nicht nur der pH-Wert-Stabilisierung, sondern durch die Zufuhr von Ca2+ wird auch die Bodenstruktur gefördert und stabilisiert. Darüber hinaus wirkt die Kalkung aber einer höheren chemischen Löslichkeit der Rohphosphate entgegen. Die daher auf mit Rohphosphat gedüngten Flächen (mit pH über 6) niedrigere Phosphatfreisetzung kann für die Phosphaternährung...
Tipo: Project description
Palavras-chave: Crop combinations and interactions; Composting and manuring; Nutrient turnover.
Ano: 2023

Subsoil loosening eliminated plough pan but had variable effect on crop yield
Provedor de dados: Organic Eprints
Autores: Munkholm, Lars J.; Olesen, Jørgen E.
Subsoil compaction is a widespread problem on Danish arable soils and especially in form of plough pan compaction. Subsoil compaction may reduce crop yield and quality, increase negative environmental impact (e.g. in form of increased nitrogen leaching), and reduce soil workability and traffic ability of the soil. Danish Institute of Agricultural Sciences has in a DARCOF project investigated the effect of subsoil loosening. The investigations were carried out in an organic crop rotation experiment at two sandy loams: Flakkebjerg (13% clay) and Foulum (8% clay).
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil.
Ano: 2005
URL: http://orgprints.org/7820/1/7820.PDF

Klimawirkungen und Nachhaltigkeit ökologischer Betriebssysteme - Untersuchungen in einem Netzwerk von Pilotbetrieben
Provedor de dados: Organic Eprints
Das hier beschriebene Projekt ist Teil eines Verbundvorhabens, das folgende Teilprojekte umfasst: FKZ 06OE353, FKZ 06OE160.   Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/cgi/saved_search?savedsearchid=1250.   Für die gesamte Bio-Branche, die Verbraucher und die Agrar-Umweltpolitik ist es wichtig zu wissen, wie klimafreundlich Betriebe des Ökologischen Landbaus wirtschaften, welche flächen- und produktbezogenen Treibhausgasemissionen auftreten und wie noch bestehende Optimierungspotenziale genutzt werden können. Während für einzelne landwirtschaftliche Teilprozesse Modelle und Analysetools zur Verfügung stehen, fehlen bisher geeignete...
Tipo: Project description
Palavras-chave: Nutrient turnover; "Organics" in general; Air and water emissions.
Ano: 2023
URL: http://orgprints.org/16945/1/vTI_06OE353.doc

Dyrkning direkte i planterester giver mindre ukrudt
Provedor de dados: Organic Eprints
Autores: Hermansen, Nina.
News from the SoilVeg project in Denmark
Tipo: Newspaper or magazine article
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage; Vegetables.
Ano: 2017
URL: http://orgprints.org/33586/1/Dyrkning%20direkte%20i%20planterester%20giver%20mindre%20ukrud_Farmers%20magazine%20MARK%20Dec%202017.pdf

Produção da cenoura e efeito na fertilidade do solo e nutrição decorrente da solarização do solo para controle da tiririca.
Provedor de dados: Organic Eprints
Autores: Ricci , Marta dos Santos Freire; Oliveira, Fabio Freire de; Miranda, Simone Cordeiro de; Costa, Janaina Ribeiro.
Dentre os desafios do cultivo orgânico de hortaliças destaca-se o controle de plantas daninhas, devido à proibição do uso de herbicidas. Entre as invasoras, a tiririca (Cyperus rotundus L.) é de difícil controle pela sua alta competitividade. A solarização é uma alternativa para desinfestação do solo, a qual consiste em cobri-lo com plástico transparente, com bons resultados no controle da tiririca. A fim de avaliar a influência do preparo e do revolvimento do solo sobre a eficiência da solarização no controle da tiririca, bem como seu posterior efeito sobre o cultivo da cenoura, foi realizado um experimento na Fazendinha Agroecológica, em Seropédica (RJ). O experimento foi disposto em blocos ao acaso com três repetições, em arranjo fatorial 2 x 3 mais uma...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop husbandry; Soil tillage; Vegetables.
Ano: 2006
URL: http://orgprints.org/22030/1/Ricci_Produ%C3%A7%C3%A3o.pdf

Competitive Nitrogen Uptake of Creeping Thistle  (C. arvense) and Spring Barley from different soil  depths
Provedor de dados: Organic Eprints
Autores: Wacker, Tomke Susanne.
The effect of cover crops on nitrogen uptake and competition between thistles and a barley crop was studied using 15N labelling of the autumn soil N pool. The effects was followed by soil and plant measurements of 15N enrichment in the following year, in plots where 15N had been added to plots grown with cover crops or plots subjected to autumn tillage
Tipo: Thesis
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil tillage; Weed management; Post harvest management and techniques.
Ano: 2017
URL: http://orgprints.org/33092/1/final.pdf

DOK-Langzeit-Versuch
Provedor de dados: Organic Eprints
In 1974, the Swiss Federal Office of Agriculture (BLW) charged the former Federal Research Station for Agricultural Chemistry and Hygiene of Environment (FAC, Bern-Liebefeld) to set up a field trial in collaboration with the FiBL in order to compare the performance of organic farming systems.When FAC-Liebefeld was shut down, the Swiss Federal Research Station for Agroecology and Agriculture (FAL-Reckenholz) took over the responsibility for the DOK trial in close cooperation with FiBL.     The DOK-long term trial - unique in its conception - compares the consequences of bio-organic, bio-dynamic and conventional farming systems in a randomised plot trial that has no other equivalent. Experimental samples are used by many other laboratories to develop new...
Tipo: Research facility description
Palavras-chave: Nutrient turnover; Soil biology; Biodiversity and ecosystem services; Crop husbandry.
Ano: 2023
URL: http://orgprints.org/5104/1/Maeder%2D2005%2DDOK.pdf

Guía de técnicas de restauración de suelos degradados en viticultura
Provedor de dados: Organic Eprints
Autores: Tardaguila, J.; Priori, S.; D'Avino, L.; Moreda, E.
Guidelines for soil functionality restoration in degraded areas of vineyard (spanish language)
Tipo: Teaching resource
Palavras-chave: Soil quality; Crop combinations and interactions; Soil biology; Composting and manuring; Nutrient turnover; Soil tillage; Soil; Biodiversity and ecosystem services; Viticulture.
Ano: 2018
URL: http://orgprints.org/33839/1/Guidelines_Resolve_soil_restoration_techniques_SPANISH.pdf

Season-long supply of plant-available nutrients from compost and fertiliser in a long term organic vs. conventional snap bean rotations experiment
Provedor de dados: Organic Eprints
Autores: Owen, Ms. Josée; LeBlanc, Mr. Serge; Fillmore, Ms. Sherry.
In Canada, stockless organic vegetable cropping systems may use compost for fertility. However, information to guide growers about when nutrients become available in the soil over the growing season is lacking. Detailed analysis of plant nutrient supply was conducted over three years in a multi-site rotations experiment using two cropping sequences. The experiment compared conventional fertility treatment (synthetic fertiliser (1x N)) with organic treatments (annual compost amendment at a low (1x N) and a high rate (3x N)). Plant-available soil nutrients were captured using sequential two-week burials of ion exchange membranes. Ions were eluted and quantified. Variation in nutrient supply over time, and effects attributable to crop rotation and fertility...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/11798/2/Owen_11798_ed.doc

Bodenbedingte Unterschiede bei der N- und S-Mineralisation von Hornmehl
Provedor de dados: Organic Eprints
Autores: Laber, Hermann.
Am Sächsischen Landesamt für Umwelt, Landwirtschaft und Geologie (LfULG) in Dresden-Pillnitz wurde im Winter 2017/2018 ein Brutversuch durchgeführt, bei dem der Einfluss der vorherigen Bodenbewirtschaftung auf das N- und S-Mineralisationsverhalten von Hornmehl untersucht werden sollte. Gleichzeitig wurden zwei pelletierte Düngemittel auf Schafwollbasis sowie ein pelletierter Dünger auf Weißkleebasis getestet.  Die von einem Schlag, aber 0 (= Freiland), 8 bzw. 17 Jahre unter Gewächshaus-Bewirtschaftung gestandenen Böden zeigten deutliche Unterschiede im Ct-, Nt- und St-Gehalt sowie Nmin-Ausgangs-Gehalt.  Überraschender Weise zeigte der Freilandboden im Brutversuch (15 °C) mit umgerechnet knapp 13 kg N/ha pro Woche eine deutlich höhere N-Nachlieferung als...
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/33040/1/Brutversuch%202018.pdf

Organik Koşullarda Uzun Süreli Önbitki -  Salçalık Biber (Capsicum annum L. cv. Kapya)  Kombinasyonu Şeklinde Yapılan  Yetiştiriciliğin Verim Meyve ve Toprak  Özelliklerine Etkisi
Provedor de dados: Organic Eprints
Autores: Duman, İbrahim; Elmacı, Ömer Lütfi.
Çalışma 2001-2010 yıllarında Ege Üniversitesi Ziraat Fakültesi Menemen Araştırma Uygulama ve Üretim Çiftliğinin “organik” sertifikalı alanında yürütülmüştür. Ana bitki olarak Yalova Yağlık 28 kapya biber çeşidi, ön bitki olarak da fiğ, kırmızı lahana, marul, bakla, brokkoli, kereviz, karnabahar ve bezelye kullanılmıştır. Organik tarım yönetmeliğine uygun yürütülen çalışmada  9 yıllık süre içerisinde ön bitkilere göre elde edilen biber verim değerleri ile bazı kalite özellikleri belirlenmiştir. Her ön bitki üretiminden sonra alınan toprak  örneğinde de organik madde ve bitki besin elementlerindeki değişim incelenmiştir. Çalışmadan elde edilen verilere göre, fiğ ön bitkisi desteğindeki geçiş sürecinde yüksek oranlarda (4352 kg da-1) elde edilen biber toplam...
Tipo: Journal paper
Palavras-chave: "Organics" in general; Farming Systems; Composting and manuring; Nutrient turnover; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/28153/1/Organik%20Ko%C5%9Fullarda%20Uzun%20S%C3%BCreli%20%C3%96nbitki-Sal%C3%A7al%C4%B1k%20Biber%20Kombinasyonu%20%C5%9Eeklinde%20Yap%C4%B1lan%20Yeti%C5%9Ftiricili%C4%9Fin%20Verim%20Meyve%20ve%20Toprak%20%C3%96ze.pdf

Plant Organic 5 jaar: evaluatie van bodemvruchtbaarheid, stikstofhuishouding en productie
Provedor de dados: Organic Eprints
Autores: Burgt, G.J.H.M.; Carina, Rietema; Bus, Michiel.
In het Planty Organic proefveld, gelegen op proefbedrijf ‘Kollumerwaard’ van SPNA, wordt een volwaardig biologisch akkerbouwsysteem ontwikkeld met drie basis uitgangspunten:  • volledig eigen stikstofvoorziening middels leguminosen  • inzet van (eigen) maaimeststoffen  • niet-kerende grondbewerking  De gegenereerde kennis en ervaring zal ten goede komen aan zowel de reguliere als de biologische akkerbouw. Het proefveld omvat zes percelen van bijna 0,8 hectare. Er is sprake van een zesjarige vruchtwisseling, dus ieder gewas is ieder jaar aanwezig.  Het project is gestart in 2011. Van ieder afzonderlijk jaar is sindsdien een rapportage verschenen. Voor deze evaluatie van de systeemontwikkeling en –prestaties is het opstartjaar achterwege gelaten en zijn de...
Tipo: Working paper
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions; Netherlands; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/32530/1/2017-037%20LbP%20Planty%20Organic%20Evaluatie_11_def.pdf

Ackerbausysteme im ökologischen Landbau unter besonderer Berücksichtigung von N-Bilanz und Effizienzkennzahlen
Provedor de dados: Organic Eprints
Autores: Beckmann, Uta; Kolbe, Hartmut; Model, Annett; Russow, Rolf.
Auf einem Sandboden und einem Lößboden wurden in Sachsen ab dem Jahr 1992 komplexe Dauerversuche durchgeführt. Es wurden Verfahren von viehlosen (System Marktfruchtbau) sowie von viehhaltenden Betrieben (System Futterbau) in der Anbaufolge mit zweijährigem Leguminosengras, Sommerweizen und Mais simuliert. In den Versuchen wurden außerdem eine stark unterschiedliche Düngungshöhe mit verschiedenen organischen Düngemitteln sowie differenzierte anbautechnische und vegetationsbegleitende Maßnahmen berücksichtigt. Die Anbauverfahren wurden sowohl in ihren kurzzeitigen Auswirkungen auf Nährstoffdynamik (Nmin, gasförmige N-Emissionen), Ertrag und Produktqualität der Kulturarten als auch in ihren langfristigen Auswirkungen auf die Nährstoffbilanzen der Fruchtfolgen...
Tipo: Report
Palavras-chave: Composting and manuring; Systems research and participatory research; Nutrient turnover; Crop combinations and interactions; Soil tillage.
Ano: 2001
URL: http://orgprints.org/1538/1/1538%2Dbeckmann%2Du%2Det%2Dal%2D2001%2Dackerbausysteme%2Dufz.pdf

Feldrandkompostierung - ein Problem für das Grundwasser?
Provedor de dados: Organic Eprints
Autores: Berner, Alfred; Mäder, Paul; Schaub, Daniel; Ott, Martin.
Wird unter Feldrandkompostmieten mehr Nitrat ins Grundwasser ausgewaschen als unter landwirtschaftlich und gemüsebaulich genutzten Böden? Gefährden die Kompostmieten das Grundwasser? Um diese Fragen zu beantworten, wurde im Birrfeld die Nitratauswaschung unter Feldrandkompostmieten während sechs Jahren überwacht. Die Resultate sind erstaunlich.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Biodiversity and ecosystem services; Soil quality; Composting and manuring; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/4055/1/berner-2004-feldrandkompostierung.pdf

Mikro og makronæringsstoffer der er udbyttebegrænsende
Provedor de dados: Organic Eprints
Autores: Hermansen, S.
Kvælstof er udbyttebegrænsende, men nye forsøg viser, at andre næringsstoffer også kan påvirke udbyttet.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2019
URL: http://orgprints.org/35351/1/2019%2002%20%C3%98IJ%20N%C3%A6ringsstoffer.pdf

Stickstoffmineralisation von Stallmist, Ackerbohnenschrot, Luzernegrünmehl und Rizinusschrot unter kontrollierten Bedingungen im Brutversuch
Provedor de dados: Organic Eprints
Autores: Raupp, Dr Joachim.
Organic farms without or with a too low animal livestock try to replace farmyard manure by using plant based organic fertilizers, e.g. legume biomass as green meal or grain meal. When applying such fertilizers, it is necessary to know their nitrogen mineralisation intensity in relation to farmyard manure. In an incubation test over three weeks (25 °C, 45% maximum water holding capacity) alfalfa meal showed a lower and faba bean meal a much higher nitrate N mineralisation than farmyard manure (15 and 69 ug g-1 dry matter, respectively, compared to 25).The largest amount was released from castor meal (99 ug g-1). After one week farmyard manure had the largest N release with 28 ug g-1.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology; Composting and manuring.
Ano: 2005
URL: http://orgprints.org/3650/1/3650.pdf

Suspension aus Biogasanlagen: Qualität und Wirkung auf den Ertrag
Provedor de dados: Organic Eprints
Autores: Raubuch, Markus; Terhoeven-Urselmans, Thomas; Scheller, Edwin.
In the present study we looked on the impact of biogas suspension from the Demeter-farm ‘Gut Sambach’ near Muehlhausen on the microbial and mineral nitrogen pool in fallow and the impact on yield of barley. We could demonstrate the composition of amino acids was not affected by the fermentation process. The applied amount of nitrogen was 65.7 kg Nt ha-1 whereby the proportion of ammonium was 24 % (15.8 kg N ha-1). The yield of barley was significantly increased.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2005
URL: http://orgprints.org/3449/1/3449.pdf

Nutrient budgeting for trace elements: Examples from Scottish organic farms
Provedor de dados: Organic Eprints
Autores: Owens, Katie; Watson, Christine.
This report was presented at the UK Organic Research 2002 Conference. Farmgate nutrient budgets have been calculated for Cu, Co and Mo for six farms in NE Scotland. All five livestock farms studied had a positive balance for Co, one showed a negative balance for Cu and two showed negative balances for Mo. The stockless farm studied showed a positive balance for Cu but negative balances for Co and Mo. These balances were calculated for a one-year period only and may thus have been strongly influenced by one-off purchases e.g. calcified seaweed. Future work will calculate budgets over whole rotations to provide a clearer picture of the long-term sustainability of trace element use on organic farms.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil; Farm nutrient management.
Ano: 2002
URL: http://orgprints.org/8385/1/owens_watson_Nutrient_budgeting_trace.pdf

Der Einfluss organischer Düngung im Langzeitdüngungsversuch auf das Ausmaß der Wurzelinfektion mit Arbuskulärer Mykorrhiza sowie die Entwicklung des wurzelexternen Myzels bei Kartoffel (Solanum tuberosum)
Provedor de dados: Organic Eprints
Autores: Scharfy, Deborah; Raupp, Dr Joachim; Neumann, Elke.
In the present study, AMF root colonisation of potato plants was compared between organically and minerally fertilised field plots, which did not significantly differ in the total amount of plant available P. The AMF root colonisation was increased in response to organic fertilisation. This indicates that organic fertilisation can enhance AMF development independently from the soil P fertilisation level. Furthermore, soil grown mycelium was trapped in fungal compartments. This technique allowed the extraction and quantification of coarse and finely branched soil grown hyphae after harvest. The soil in the fungal compartments was either fertilised with low or with high amounts of mineral P. In organically fertilised field plots, the amounts of finely...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology; Composting and manuring.
Ano: 2005
URL: http://orgprints.org/3679/1/3679.pdf

Energie aus Biomasse im Ökolandbau - Weiterentwicklung oder Konventionalisierung der Ökobetriebe?
Provedor de dados: Organic Eprints
Autores: Graß, Rüdiger.
Der in den letzten Jahren in der gesamten Landwirtschaft zu verzeichnende Boom der regenerativen Energieerzeugung hat zu einer starken Zunahme von landwirtschaftlichen Biogasanlagen geführt. Auch im Ökologischen Landbau ist das Thema von wachsender Bedeutung. Der vorliegende Beitrag diskutiert die Chancen und Risiken der energetischen Biomassenutzung speziell unter den Bedingungen und Vorgaben des Ökologischen Anbaus. Welche Nutzungsformen sind „kompatibel“ mit dem Ökolandbau? Welche Erfahrung konnten bislang gemacht werden und wo sind Fehlentwicklungen zu beobachten? Wie werden Bodenhaushalt, Artenvielfalt und betriebliche Kreislaufprozesse durch die Biogaserzeugung direkt oder indirekt beeinflusst? Es werden Voraussetzungen genannt, unter denen eine...
Tipo: Report chapter
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Biodiversity and ecosystem services.
Ano: 2008
URL: http://orgprints.org/15421/1/Gra%C3%9F.pdf

Decomposition rate of organic fertilizers: effect on yield, nitrogen availability and nitrogen stock in the soil
Provedor de dados: Organic Eprints
Autores: Opheusden, A. H. M.; Burgt, Geert-Jan H.M.; Rietberg, P.I.
The nitrogen of organic fertilizers does not fully mineralize within a season, and hence will partly become available in later years. This effect is taken into account for the first year but generally not in later fertilizer applications. If it would be taken into account, fertilizer use could be more efficient. This study is an analysis of a 13-year field trial where crop yield was measured in 13 fertilizer treatments which differ in total N applied and decomposition rate. This is complemented with a model study in which mineralization and soil nitrogen content were calculated. We intended to show step by step that the use of fertilizers with a low decomposition rate, relative to fertilizers with a high decomposition rate, lead in the course of years to...
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2012
URL: http://orgprints.org/21705/1/plugin%2D2666.pdf

Unravelling collembolan life belowground: Stoichiometry, metabolism and release of carbon and nitrogen
Provedor de dados: Organic Eprints
Autores: Larsen, Thomas.
This thesis investigated carbon and nitrogen dynamics of soil dwelling Collembola by using direct measurements and stable isotope additions. In an isotope change experiment, collembolans exchanged between 6 and 10% of carbon and nitrogen in their body tissue per day to metabolism and between 0.5 and 2% to reproduction. When collembolans on low and high protein diets were compared, animals on the low protein quality depleted their tissue 15N values relative to those on high quality diet indicating that the nitrogen turnover decreased on the low protein quality diet. In a wheat microcosm investigating  source contributions from soil, roots and isotope labelled green manure the mixing model analysis indicated that photosynthate (root derived C) was the main...
Tipo: Thesis
Palavras-chave: Nutrient turnover.
Ano: 2007
URL: http://orgprints.org/10585/1/10585.pdf

Ta fosforet tilbake
Provedor de dados: Organic Eprints
Autores: Løes, Anne-Kristin; Eikås, Sondre.
Organic farming systems with restricted access to animal manure often experience decline in soil P concentrations. Nutrients should be cycled in society to maintain the long-term fertility of agricultural soil. One option for this may be precipitation of struvite (magnesium-ammonium phosphate) from sewage treatment plants, to be Applied as fertiliser. Struvite produced in a Norwegian sewage plant (Hias IKS)significantly increased yield levels and soil P concentrations, when applied in one season (2018) in a long-term experiment comparing two levels of manure application at Tingvoll research farm, NW Norway. Struvite has been proposed by the Expert Group EGTOP to be included in Annex 1, listing permitted fertiliser inputs in organic farming. However, a...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2019
URL: http://orgprints.org/36768/1/Nationen%20kronikk%202019%20Ta_fosforet_tilbake.pdf

Udbytte og økonomi i sædskifter – erfaringer fra sædskifteforsøgene
Provedor de dados: Organic Eprints
Autores: Tersbøl, Michael.
Udbyttet i de forskellige sædskifter afhænger mest af jordtype og gødskning. Kløvergræs som grøngødning øger udbyttet i vinterhvede, dog ikke på grovsandet jord. Sædskifter med og uden grøngødning er økonomisk ligeværdige, når omkostninger til maskiner og arbejde tages i betragtning. Helårsgrøngødning er særlig relevant for at forebygge problemer med rodukrudt.
Tipo: Web product
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Production systems; Farm economics; Denmark.
Ano: 2004
URL: http://orgprints.org/3907/1/3907.pdf

Jordlivet under lupen – ulike modeller for å forstå plantenes næringsopptak
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun.
Jordlivet under lupen – ulike modeller for å forstå plantenes næringsopptak   Mikroorganismer er alfa og omega for fruktbar og god jord. De er jordas ryggrad, immunforsvar og fordøyelsessystem, og de lever i viktige samspill med røtter og andre jordorganismer. Et mer økologisk og biologisk fokus på prosesser i jord må vektlegges i forskning, rådgivning og praksis for å forvalte og bruke jordbruksjorda på en mer bærekraftig måte. For planteernæring er mer enn ionebytte og mineralisering av organisk materiale. I Möschberg i Sveits ble det i januar 2006 arrangert en konferanse som samlet 65 gardbrukerer, forskere og rådgivere med bakgrunn i biodynamisk, organisk-biologisk og økologisk landbruk fra Sveits, Tyskland, Østerrike og Norge. Temaet var...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2006
URL: http://orgprints.org/8767/1/Jordlivet_under_lupen_2006.doc

CAUSES OF SOIL MALFUNCTIONING IN DEGRADED AREAS OF EUROPEAN AND TURKISH VINEYARDS
Provedor de dados: Organic Eprints
Autores: Costantini, E.A.C.; Priori, S.; Giffard, B.; Fulchin, E.; Tardaguila, J.; Schroers, H.J.; Pelengic, R.; Akca, E.; Tangolar, S.; Valboa, G.
A study was carried out in nineteen vineyards of five countries, well representative of major viticultural districts, which showed areas with fertility problems, consequence of strong soil erosion occurred during either pre-planting or ordinary cultivation. The comparison between degraded and non-degraded areas highlighted that the soil features limiting water nutrition and enhancing potential water stress were the most frequent discriminant soil conditions. Low nitrogen availability was the second most important cause of soil malfunctioning, together with low organic matter content. The degradation was also reflected in the very low values of the C/N ratio, pointing to a difficulty of microbiota in synthetizing humus. Other limiting factor were excessive...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Soil; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/33458/1/7906-25845-1-PB.pdf

Projekt Ökologische Bodenbewirtschaftung (PÖB) - Ergebnisse nach sieben Jahren [Project Ecological Soil Management - results after seven years]
Provedor de dados: Organic Eprints
Autores: Hampl, Ulrich.
Ziel des Projektes ist es, Daten über die bodenökologische Entwicklung bei ökologischem Ackerbau mit differenzierter Grundbodenbearbeitung zu gewinnen.  Mit Unterstützung durch das Land Rheinland-Pfalz konnte 1994 in Rheinhessen ein Langzeitversuch angelegt werden, wo in Form eines Demonstrationsversuches zwei Wiederholungen einer fünffeldrigen Ackerbaufruchtfolge installiert wurden. Die drei Gundbodenbearbeitungsvarianten Pflug, Zweischichtenpflug und Schichtengrubber wurden in ein Fruchtfolgesystem eingebaut, das durch Kombination von Grundbodenbearbeitung mit gezielten Gründüngungsverfahren (Grünbrache und Zwischenfruchtbau) Bodenverbesserung und Krumenstabilisierung bewirken soll. In Zusammenarbeit mit verschiedenen Hochschulen, Institutionen und...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality; Soil tillage; Biodiversity and ecosystem services; Soil biology.
Ano: 2003
URL: http://orgprints.org/1073/1/1073%2Dhampl%2Du%2D2003%2Dpoeb%2Dwien.pdf

Nitrate leaching and N2-fixation in grasslands of different composition, age and management
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Vinther, F.P.
Cut grassland systems usually have high N efficiency and consequently low nitrate leaching, whereas the introduction of grazing animals increases the loss potential dramatically (Jarvis, 2000). It has been demonstrated that nitrate leaching from unfertilised grass-clover swards is lower than from mineral-N fertilized swards grazed by cattle. The possible explanation for this is that the N2 fixation by pasture legumes is regulated by a natural feedback mechanism driven by soil inorganic N levels. The feedback mechanism acts as a limit to N inputs from legumes and consequently regulates the potential for N losses (Ledgard, 2001).   Here is reported 5 years of nitrate leaching from four cropping sequences with different grassland frequency and management for...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/3666/1/3666.doc

Etude de la décomposition par l'utilisation de sachets de thé
Provedor de dados: Organic Eprints
Autores: Tresch, Simon; Fliessbach, Andreas.
Comparer la décomposition du thé vert comme un matériau de décomposition rapide avec le thé rooibos comme un matériau qui est difficile à décomposer, permet de calculer l'Indice du Sachet de Thé (Tea Bag Index TBI). Cela fournit des informations sur la capacité du sol en tant qu'organisme vivant à transformer les résidus organiques en nutriments disponibles pour les plantes et à contribuer a l'accumulation d'humus dans le sol. Cette technique est facile à ppliquer. Placez le sachet de thé dans le solet sortez‐le après trois mois pour déterminer combine il reste de matière. Il est fascinant de découvrir le résultat de nos petits auxiliaires travaillant dur dans le sol et comment ce travail fournit des nutriments à une nouvelle génération de plantes.
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32466/1/tresch-fliessbach-2017-teabag-french.pdf

Nitrogen balances in Dutch organic greenhouse production
Provedor de dados: Organic Eprints
Autores: Cuijpers, Ir. W.J.M.; van der Burgt, Ir. G.J.H.M.; Voogt, Dr. W.
The organic greenhouse production in the Netherlands is limited with regard to the number of growers, but plays an important role in EU organic greenhouse production. In the high-technology greenhouses a high production level is realized but nitrogen balances of this production system have been questioned. In order to document and improve the nitrogen balance, the production of seven greenhouses was monitored and soils were repeatedly analysed. The model “Bemestingsrichtlijn biologische kasteelten” (Fertilization Guide Organic Greenhouse Production) has been developed to simulate nitrogen availability and to fine-tune manure applications to crop demand. In the course of four years the overall nitrogen surpluses decreased sharply, but due to the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management; Greenhouses and coverings.
Ano: 2008
URL: http://orgprints.org/15862/1/DutchGreenhouseProduction.pdf

Anaerobic co-digestion of grass and forbs – Influence of cattle manure or grass based inoculum
Provedor de dados: Organic Eprints
Autores: Cong, W.-F.; Moset, V.; Feng, L.; Møller, H.B.; Eriksen, J.
Anaerobic co-digestion of agricultural by-products or wastes with complementarity characteristics is commonly used to enhance methane yield. This study firstly explores the possibility of co-digesting grass and forb species (white clover, chicory and plantain) differing in nutrient composition in enhancing methane yield. This was examined with two inocula (a cattle manure-based inoculum and a grass-based inoculum) in a batch assay. Results showed that co-digesting grass and forbs synergistically enhanced methane yield potential on average by 31 L kg−1 volatile solids (+11%) and reduced lag phase time by 0.8 day in the grass-based inoculum, but not in the cattle manure-based inoculum. Mixtures containing plantain showed more consistent synergistic effect...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/34980/1/1-s2.0-S0961953418302320-main.pdf

Management Strategies and Practices for Preventing Nutrient Deficiencies in Organic Crop Production
Provedor de dados: Organic Eprints
Autores: Malhi, Sukhdev S.; Brandt, Stewart A.; Zentner, R. P.; Knight, Diane J.; Gill, Kabal S.; Sahota, Tarlok S.; Schoenau, J. J.
Field experiments are underway in Canada to determine the influence of management practices (crop diversity, green manure, legumes) and amendments (Penicillium bilaiae, rock phosphate, elemental S, gypsum, manure, wood ash, alfalfa pellets) on crop yield. In the alternative cropping systems study established in 1995, crop yields for organic system without any chemical input were 30-40% lower than the conventional system with high inputs. But, lower input costs plus price premiums for organic produce normally more than offset lower yields, resulting in favourable economic performance and energy efficiency. Legume, green manure and compost manure helped to replace nutrients lacking in the soil and improved crop yields. In the organic system, amount of P...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/11821/1/Malhi_11821_ed

Entwicklung einer praxisanwendbaren Methode der Humusbilanzierung im ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Brock, Christopher; Hoyer, Uta; Leithold, Günter; Hülsbergen, Kurt-Jürgen.
Ziele des Projektes waren die Untersuchung von systemspezifischen Besonderheiten und Anforderungen an die Humusreproduktion unter Bedingungen des ökologischen Landbaus, sowie die Anpassung oder Erarbeitung einer Humusbilanzmethode zur Anwendung im ökologischen Landbau.  Die Untersuchungen wurden unter Einbeziehung von 8 Praxisbetriebspaaren (ökologisch vs. konventionell), 3 ökologischen Versuchsbetrieben und 16 Dauerfeldversuchen durchgeführt.   Ergebnisse:  1. Eine Absicherung von Unterschieden in Niveau und Entwicklung der Humusgehalte unter konventioneller und ökologischer Bewirtschaftung war sowohl unter Praxisbedingungen, wie auch in den Dauerfeldversuchen kaum möglich. Hier wurde die Notwendigkeit einer differenzierten Betrachtung der...
Tipo: Report
Palavras-chave: Nutrient turnover; Composting and manuring; Soil tillage.
Ano: 2008
URL: http://orgprints.org/16447/1/16447%2D03OE084%2Duni_giessen%2Dbrock%2D2008%2Dhumusbilanzierung.pdf

The effect of catch crops on sulphate leaching and availibility of S in the succeeding crop on sandy loam soil in Denmark
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Thorup-Kristensen, K.
Sulphate leaching losses may reduce the long-term possibility of maintaining the S supply of crops in low input farming systems. The ability of catch crops (Italian ryegrass [Lolium multiflorum Lam], winter rape [Brassica napus L.] and fodder radish [Raphanus sativus L.]) to reduce soil sulphate concentrations in autumn and make it available to a succeeding crop was investigated in 1996-98 on sandy loam soil in Denmark. All catch crops reduced soil sulphate concentrations in the autumn compared to bare soil. Especially the cruciferous catch crops had the ability to deplete efficiently soil sulphate levels and thus, reduce the sulphate leaching potential. The S uptake in aboveground catch crop was 8, 22 and 36 kg S ha-1 for ryegrass, winter rape and fodder...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/168/1/paper.pdf

Basal organic phosphorus mineralization in soils under different farming systems
Provedor de dados: Organic Eprints
Autores: Oehl, F.; Frossard, E.; Fliessbach, A.; Dubois, D.; Oberson, A.
Soil organic P (Po) mineralization plays an important role in soil P cycling. Quantitative information on the release of available inorganic P (Pi) by this process is difficult to obtain because any mineralized Pi gets rapidly sorbed. We applied a new approach to quantify basal soil Po mineralization, based on 33PO4 isotopic dilution during 10 days of incubation, in soils differing in microbiological activity. The soils originated from a 20 years old field experiment, including a conventional system receiving exclusively mineral fertilizers (MIN), a bioorganic (ORG) and bio-dynamic (DYN) system. Indicators of soil microbiological activity, such as size and activity of the soil microbial biomass and phosphatase activity, were highest in DYN and lowest in...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology; Soil quality.
Ano: 2004
URL: http://orgprints.org/2791/1/Oehl_et_al_2004_SBB_36.pdf

Anwendung zweier Methoden zur Überprüfung der N-Versorgung von Kartoffeln im Ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Dresow, Jana F.; Böhm, Herwart.
Der vorliegende Beitrag befasst sich mit der Überprüfung der N-Versorgung von Kartoffeln im Ökologischen Landbau mittels zweier Methoden. Zum einen wurde die für den konventionellen Landbau entwickelte Stängelsaftanalyse mittels Nitracheck-Reflektometer angewandt; zum anderen die Blattanalyse mit der Gesamtstickstoffbestimmung mittels CNS-Analysator. Die Messungen zeigen im Verlauf der Vegetationsperiode eine Abnahme sowohl der Nitratgehalte im Stängelsaft als auch der Stickstoffgehalte im Blatt. Diese Abnahme war bei den NO3-Gehalten im Stängelsaft deutlich stärker ausgeprägt als bei den Nt-Gehalten in den Blättern. Es bestehen lineare, aber sortenspezifische Zusammenhänge zwischen den NO3-Gehalten im Stängelsaft und den Nt-Gehalten in den...
Tipo: Book chapter
Palavras-chave: Nutrient turnover; Root crops.
Ano: 2010
URL: http://orgprints.org/29607/1/Dresow-B%C3%B6hm_2010_LBF-SH335_N-Versorgung-Kartoffel.pdf

Effects of applying anaerobically digested slurry on soil available organic C and microbiota
Provedor de dados: Organic Eprints
Autores: Johansen, A.; Pommeresche, R.; Riley, H.; Løes, A.-K.
Anaerobic digestion of animal slurries and plant residues is a valuable technology to produce bioenergy and fertilizers in organic farming systems, while at the same time reducing propagules of weeds and parasites in the input material. However, the digestion changes the quality of the slurry by reducing its content of organic matter and increasing mineral nitrogen (N) levels. This may have profound impact on soil fauna and microorganisms as well as the biogeochemical processes they drive. Organic farmers fear that application of digested materials may have negative implications for soil fertility by reducing the input of organic matter to the soil, compared to fertilizing with traditional animal slurries or green manures. Hence, it is important to gain...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2013
URL: http://orgprints.org/24569/1/24569.pdf

Potenziale der teilflächenspezifischen Kalkversorgung von Grünland
Provedor de dados: Organic Eprints
Autores: Gebbers, Robin; Kramer, Eckart.
Gegenstand war der Erhalt einer optimalen Boden-Acidität im Grünland. Ziele des Vorhabens waren:  (i) Entwicklung, Tests und Bewertungen von pH-Sensorsystemen,  (ii) Entwicklung von Auswertungsmethoden für die sensorgestützte Bodenkartierung sowie von sen-sorgestützen Entscheidungsunterstützungsalgorithmen zur adaptiven Kalkung,  (iii) Ermittlungen der Bodenvariabilität durch Bodensensoren und ihr Zusammenhang mit wesentlichen Eigenschaften des Grünlands.  Im Projektverlauf gab es Schwierigkeiten: Budgetkürzungen, Fachkräftemangel, technische Probleme und Schäden, Trockenphasen sowie ein Arbeitsunfall beeinflussten Projektziele und Zeitplanung. Eine Verlängerung und Aufstockung des Projektes kam nicht zustande. Die Ergebnisse wurden nicht voll-ständig...
Tipo: Report
Palavras-chave: Pasture and forage crops; Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/33938/1/33938-12NA031_116-hnee-atb-kramer-2017-hpGreen.pdf

Nitrogen and carbon release during decomposition of roots and shoots of leguminous green manure crops
Provedor de dados: Organic Eprints
Autores: Talgre, Liina; Roostalu, Hugo; Maeorg, Erkki; Lauringson, Enn.
In Nordic conditions, soils are frozen during winter, affecting the decomposition rates of crop residues. Hence, the decomposition rates of above- and underground biomass and the dynamics of the N and C released into the soil were studied in trials focused on green manure crops. The decomposition of the residue and N release from the residue varied among the five species of legume tested. There was a marked difference in decomposition rates between shoots and roots, which may also be explained by the differences in the chemical composition of the residue. The shoot residue decomposes rapidly and it serves as a source of N for the subsequent crop. The root residue decomposes more slowly and this had a positive effect in a crop rotation in the second year....
Tipo: Journal paper
Palavras-chave: Production systems; Nutrient turnover; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/35242/1/Talgre_et_al_2017.pdf

Maize root growth and P uptake dependency on spatial distribution of sewage sludge, sewage sludge ash, and TSP
Provedor de dados: Organic Eprints
Autores: Lemming, Camilla; Oberson, Astrid; Jensen, Lars Stoumann; Magid, Jakob.
Shoot P uptake from TSP was largely increased by the localized placement.  For the ASH, the localized placement clearly decreased shoot P uptake from the ash.   For Sewage Sludge, localized placement decreased P uptake from the soil whereas P uptake from the sludge was almost unaffected.  • Overall, total shoot P uptake was significantly affected by the treatment (p&lt;0.005).
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/27961/7/27961.pdf

Entwicklung der Nährstoff- und Humusgehalte am Standort Gülzow nach langjähriger ökologischer Bewirtschaftung
Provedor de dados: Organic Eprints
Autores: Gruber, Harriet; Burmann, Birgit.
Die in der vierten Rotation befindliche Fruchtfolge am Standort Gülzow wurde seit 1992 ökologisch bewirtschaftet. Die Fruchtfolge hat sich geringfügig verändert und umfasst derzeit 33 bzw. 50 % Leguminosen und wurde wie ein viehhaltender Betrieb mit 0,6 - 0,8 GV/ha bewirtschaftet. Während des Beobachtungszeitraumes wurden jährlich Grundnährstoffgehalte, pH-Werte und der C- und Nt-Gehalt im Boden bestimmt. Die Effizienz der Nährstoffverwertung liegt zwischen 70 und 90 %. In der Folge bewegen sich die Nährstoffgehalte im Boden auf hohem Niveau im Bereich der Gehaltsklassen C und D. Der pH-Wert nahm in den letzten Jahren kontinuierlich bei zunehmender Differenzierung zwischen den Schlägen ab. Positive Humusbilanzen führten zu steigenden C-Gehalten im Boden....
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/29704/1/Entw.%20N%C3%A4hrstoff-%20und%20Humusg._Gruber.pdf

Potentially mineralizable nitrogen is soils green manured with biocidal crops
Provedor de dados: Organic Eprints
Autores: Marchetti, Rosa; Lazzeri, Luca; Malaguti, Lorena; Orsi, Anna; Ponzoni, Gilda.
Biofumigant crops used as green manure, in addition to producing a biocidal effect on some soil-borne pathogens and pests, could represent a source of N for crop nutrition. In two laboratory experiments we compared i) the potentially mineralizable N (PMN) of a silty clay soil after incorporation of glucosinolate-containing (GLS+) and non-containing (GLS–) plants, or after incorporation of metam sodium; and ii) the mineralization rate of different types of soils (silty clay, loam and loamy sand) after green manuring with GLS+ crops. After a 3-month incubation, the PMN of the silty clay soil amended with the GLS+ Brassica juncea was significantly higher than the unamended control and the soil amended with Triticum aestivum and Eruca sativa. Metham sodium,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2008
URL: http://orgprints.org/11969/1/Marchetti_11969_ed.rtf

Fractions of particulate organic matter in soils depending upon farmyard manure and mineral fertilization
Provedor de dados: Organic Eprints
Autores: Raupp, Dr Joachim; Oltmanns, Meike.
In a long-term fertilization trial particulate organic matter (POM) was investigated after 20 years of farmyard manure vs. mineral fertilization at different levels with the method of Meijboom et al. (1995). The organic matter was separated with sodium polytungstate (Magid et al., 1996; Six et al., 1999) into a light (p &lt;1.13 g cm-3), medium (1.13-1.37 g cm-3) and heavy (p &gt;1.37 g cm-3) fraction.   The organically fertilized plots had lower contents of the light fraction (0.73 - 0.78 g kg-1 dry matter on average of all fields) compared to the mineral treatment (0.95 g kg-1 TS). This gives a hint that organic residues are decomposed faster in the manure fertilized soil, according to the higher biological activity found earlier in this treatment. The...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology; Composting and manuring.
Ano: 2002
URL: http://orgprints.org/770/1/rai02po.pdf

Rolle des Phosphors als Steuerungsgröße des Stickstoffertrages und der Phytodiversität ökologisch bewirtschafteter Dauergrünlandbestände
Provedor de dados: Organic Eprints
Das Forschungsvorhaben hat zum Ziel, den Effekt der Phosphorversorgung auf die Zusammensetzung von Pflanzenbeständen des ökologisch bewirtschafteten Grünlandes unter besonderer Berücksichtigung der Grünlandleguminosen, deren Funktionalität und der Phytodiversität zu bemessen. Zu diesem Zweck werden auf artenreichen Grünlandflächen ausgewählter Standorttypen (Salzgrasland, Niedermoorgrünland, Moränengrünland) Felderhebungen durchgeführt, welche auf die Bemessung des skalenabhängigen Einflusses unterschiedlicher P-Trophiezustände auf die Präsenz der Grünlandleguminosen (insb. Trifolium repens) sowie die der weiteren Bestandesbildner ausgerichtet sind. Auf Grundlage dieser sowie weiterer Daten soll versucht werden, Schwellenwerte für die Versorgung der...
Tipo: Project description
Palavras-chave: Pasture and forage crops; Nutrient turnover; Biodiversity and ecosystem services.
Ano: 2023

Stepwise incorporation of white clover (Trifolium repens L.)as fertiliser increases nitrogen fixation and improves nitrogen retention when intercropped with leek (Allium porrum L.)
Provedor de dados: Organic Eprints
Autores: Xie, Yue; Sørensen, Jørn Nygaard; Petersen, Karen Koefoed; Kristensen, Hanne Lakkenborg.
Background and aims  We investigated whether the incorporation of intercropped white clover as a split-dose fertiliser improves N retention of the plant-soil system in leek production.    Methods  White clover and leek were grown in pots where clover was stepwise incorporated into soil as fertiliser. Half of the clover was incorporated before leek transplantation (LT), the other half was incorporated 26 (S1) or 41 (S2) days after LT, compared with full incorporation of all clover (F) before LT. 15N injection and leaching studies were performed to investigate interspecific competition and the effects of precipitation on soil N availability.    Results  Stepwise incorporations increased or had no effect on leek growth, despite competition for N between white...
Tipo: Journal paper
Palavras-chave: Soil quality; Crop combinations and interactions; Composting and manuring; Nutrient turnover; Soil tillage; Vegetables.
Ano: 2018
URL: http://orgprints.org/34289/1/Xie%20et%20al%20Plant%20and%20Soil%202018.pdf

Karbonlagring i jord (innlegg og dikskusjonspanel)
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun.
Karbonlagring i jord
Tipo: Teaching resource
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/33001/1/Karbonlagring%20i%20jord%20%20til%20diskusjon%20Bl%C3%A6stadstudenter%2013mars%202018.pdf

Symbiotisk N2 fiksering i kløvergræs
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
Bælgplanter, herunder de forskellige kløverarter, kan ved knoldbakteriers hjælp (symbiose) optage luftens kvælstof (N2) og derved udnytte denne uudtømmelige kvælstofkilde. Processen er ganske enkelt forudsætningen for at kunne drive økologisk jordbrug, og det har derfor stor interesse at kende størrelsen af N-fikseringen og få et bedre kendskab til de faktorer som har betydning for processen. Derved bliver det muligt at optimere produktiviteten og reducere eventuelle miljømæssige effekter af et givet dyrkningssystem.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Production systems; Pasture and forage crops.
Ano: 2003
URL: http://orgprints.org/1837/1/Klumme_fra_Finn_Vinther.doc

SUREVEG - recirkulering af planteaffald og samdyrkning af grønsager
Provedor de dados: Organic Eprints
Autores: Vesterholt, Lasse Lillevang.
Core Organic Cofund projekt bevilget i 2018, der går ud på at udvikle nye økologiske dyrkningsystemer til produktion af grøntsager. Målet er at forbedre systemernes bæredygtighed og resiliens, recirkulering af næringsstoffer og jordens lagring af kulstof. Projektet blev præsenteret ved Åbent hus arrangement hos Klintholm (deponerings- og affaldsbehandlingsanlæg ejet af seks fynske kommuner) i samarbejde med Naturstyrelsen og Danmarks Naturfredningsforening, den 30. maj 2018.
Tipo: Other
Palavras-chave: Soil quality; Crop combinations and interactions; Composting and manuring; Nutrient turnover; Vegetables; Biodiversity and ecosystem services.
Ano: 2018
URL: http://orgprints.org/34482/3/AU-3%20Poster%20Recirkulering%20af%20planteaffald%20og%20samdyrkning%20af%20gr%C3%B8ntsager%20maj%202018_34482.pdf

Finnish trends in phosphorus balances and soil test phosphorus
Provedor de dados: Organic Eprints
Autores: Uusitalo, Risto; Turtola, Eila; Grönroos, Juha; Kivistö, Juhani; Mäntylahti, Väinö; Turtola, Ari; Lemola, Riitta; Salo, Tapio.
Soil test phosphorus (P) concentration has a major influence on the dissolved P concentration in runoff from agricultural soils. Thus, trends in soil test P partly determine the development of pollution potential of agricultural activities. We reviewed the changes of soil test P and P balances in Finnish agriculture, and assessed the current setting of P loss potential after two Agri-Environmental Programs. Phosphorus balance of the Finnish agriculture has decreased from +35 kg ha–1 of the 1980’s to about +8 kg P ha–1 today. As a consequence, the 50-yr upward trend in soil test P concentrations has probably levelled out in the late 1990’s, as suggested by sampling of about 1600 fields and by a modelling exercise. For the majority of our agricultural soils,...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2007
URL: http://orgprints.org/17083/1/uusitalo.pdf

Effect of tillage intensity and timing on nitrogen mineralization after a perennial forage crop
Provedor de dados: Organic Eprints
Autores: Wald, Fabian; Pekrun, Carola; Claupein, Wilhelm.
Information about the effect of single cultivation operations on N-mineralization after perennial legumes is relatively scarce. However, for nutrient saving management, particularly in organic farming, knowledge on these effects is essential.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil tillage.
Ano: 2000
URL: http://orgprints.org/8984/1/Poster%2D1%2DD%2D2.JPG

Using vegetation indices in autumn to estimate nitrate leaching during autumn and winter in different cropping systems
Provedor de dados: Organic Eprints
Autores: Zhao, Jin; De Notaris, Chiara; Olesen, Jørgen E.
Nitrate leaching losses from arable cropping systems cause severe damages to the environmental services worldwide. There is a considerable need for methods that allow rapid, easy and area covering detection of nitrate leaching to guide N management. We used three years of data from the 5th cycle of a long-term crop rotation experiment in Denmark to  quantify the relationships between nitrate leaching in autumn and winter and field conditions in autumn as defined by three vegetation indices [VIs; Ratio Vegetation Index (RVI), Normalized Difference Vegetation Index (NDVI), Ratio Red Edge (RRE)] in autumn. Following cereal crops, catch crops significantly reduced nitrate leaching in autumn and winter, whereas this was only the case for one out of the three...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions; Farm nutrient management.
Ano: 2019
URL: http://orgprints.org/35137/1/Manuscript-20190324.pdf

Soil fertility comparison among organic and conventional managed citrus orchards in Sicily.
Provedor de dados: Organic Eprints
Autores: Stefano, Dr. Canali; Alessandra, Dr. Trinchera; Emanuela, Dr. Di Bartolomeo; Luigi, Dr. Nisini; Anna, Dr. Benedetti; Francesco, Dr. Intrigliolo.
In recents years, organic farming is expanding in Southern Italy and in the Mediterranean area, due to interest of consumers and EU agricultural policies.  Evaluation of organic farming system introduction on soil quality and fertility status should be taken into account in order to define medium-long term environmental and agricultural strategies, on both locol and national scale. Soil physical, chemical and biological parameters represent effective tools to evaluate soil quality and changes in soil fertility status, as a consequence of different agronomic management (i.e. organic vs coventional). The aim of this work was to compare soil fertility of conventional and organic managed citrus Orchards, using specific soil system descriptors. The research was...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management; Soil quality; Fruit and berries.
Ano: 2002
URL: http://orgprints.org/7814/1/Canali_et_al_17_WCSS_%2D_Bangkok.pdf

Simulating soil N2O and CO2 emissions from arable cropping systems using FASSET and MOBILE-DNDC
Provedor de dados: Organic Eprints
Autores: Chirinda, N.; Kracher, D.; Porter, J.R.; Olesen, J.E.; Petersen, B.M.; Doltra, J.; Kiese, R.; Butterbach-Bahl, K.
Modelling of soil emissions of nitrous oxide (N2O) and carbon dioxide (CO2) is complicated by complex interactions between processes and factors influencing their production, consumption and transport. In this study N2O emissions and heterotrophic CO2 respiration were simulated from soils under winter wheat grown in three different organic and one inorganic fertilizer-based cropping system using two different models, i.e., MoBiLE-DNDC and FASSET. The two models were generally capable of simulating most seasonal trends of measured soil heterotrophic CO2 respiration and N2O emissions. Annual soil heterotrophic CO2 respiration was underestimated by both models in all systems (about 10−30% by FASSET and 10−40% by MoBiLE-DNDC). Both models overestimated annual...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2010
URL: http://orgprints.org/18512/1/Chirinda_et_al_(modelling).pdf

Deep roots of Brassica oleracea have high uptake of 15N-nitrate to 2 meters soil depth
Provedor de dados: Organic Eprints
Autores: Kristensen, H.L.; Thorup-Kristensen, K.
• Deep roots may be important for uptake of NO3- by annual crops. A field experiment with the deep rooted crop curly kale (Brassica oleracea L. convar. acephala (DC.) Alef. var. sabellica L.) was performed to investigate root distribution and N uptake in deep soil layers.  • Root distribution was investigated by use of minirhizotrons and root extractions to 2.4 m depth. The capacity for crop N uptake was studied by deep 15NO3- placement followed by analysis of plant 15N content after 3-30 days.   • The atom percent 15N excess (APE) of plant samples was of similar size after uptake of 15N placed at depths in the range of 0.4-2 m. Root colonisation and start of 15N uptake were synchronized in 2.4 m depth.  • The deep roots had higher inflow of 15N compared...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology; Farm nutrient management; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/7918/1/7918.pdf

Phosphorus availability on many organically managed farms in Europe
Provedor de dados: Organic Eprints
Autores: Cooper, Julia; Reed, Eleanor Y.; Hörtenhuber, Stefan Josef; Lindenthal, Thomas; Løes, Anne-Kristin; Mäder, Paul; Magid, Jakob; Oberson, Astrid; Kolbe, Hartmut; Möller, Kurt.
Maintaining sufficient soil phosphorus (P) levels for non-limiting crop growth is challenging in organic systems since off-farm inputs of P are restricted. This study assessed the status of P on organic farms in Europe using soil test results for extractable P. Data was obtained from published literature, unpublished theses, and various national and regional databases of soil test values. Most of the data (15,506 observations) came from field scale soil tests, but in some cases (1272 observations) values had been averaged across a farm. Farm scale and field scale data were analysed separately and the impact of farm type (arable, dairy, grassland, horticulture, mixed, poultry, unknown) was assessed. Soil test results were assigned to P classes from very low...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/32707/1/Cooper%20et%20al%202017%20NCAES.pdf

Cultiver sans labourer: Bon pour le sol, bon pour le climat
Provedor de dados: Organic Eprints
Autores: Krauss, Maike.
Quand un agriculteur bio renonce au labour, cela permet de former davantage d’humus et de protéger le climat. Il faut cependant bien connaître son affaire pour que ça fonctionne dans la pratique.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Soil tillage; Air and water emissions.
Ano: 2017
URL: http://orgprints.org/32225/1/Bioactualit%C3%A9s_6_2017_M.Krauss.pdf

Grow more crops at the same time
Provedor de dados: Organic Eprints
Autores: Hermansen, Nina.
Results from the InterVeg project of the Danish trials on leek and cauliflower intercropped with catch crops
Tipo: Web product
Palavras-chave: Production systems; Soil quality; Nutrient turnover; Air and water emissions; Vegetables.
Ano: 2016
URL: http://orgprints.org/32029/1/index.html

Fertilisation de la courge de plein champ : test de différentes doses et de 2 types d'engrais - rapport final 2005
Provedor de dados: Organic Eprints
Autores: Védie, Hélène.
La fertilisation en maraîchage biologique est sans aucun doute encore un vaste domaine à explorer. Le manque de références sur les besoins des cultures d’une part, et sur les possibilités de fournitures du sol par minéralisation d’autre part, amène bien souvent les producteurs à « naviguer à vue » en utilisant des doses standards, qui ne reposent pas sur des bases agronomiques éprouvées.  Les suivis réalisés par le GRAB sur aubergine en 2003 et melon en 2004 montrent qu’il est possible de diminuer les doses d’engrais azotés, sans perte de rendement. La marge de manœuvre est très importante en bio, où les fournitures par le sol sont sans doute largement sous-estimées. Des essais de fertilisation en maraîchage biologique sont donc encore nécessaires afin de...
Tipo: Report
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/8721/1/fertilisation_courge.pdf

Organically grown grassclover in nature areas to remove soil phosphate for development of specious rich grasslands
Provedor de dados: Organic Eprints
Autores: Timmermans, B.G.H.; Eekeren, N. van.
Worldwide the current reserves of phosphate rock are being exhausted. In The Netherlands many former agricultural soils have been enriched by large quantities of phosphorus as a result of fertilization. It is thought that this phosphorus prevents development of target-nature types. Nature organizations currently seek ways to remove it. We tested grassclover, organically managed by local farmers, as a tool to extract excessive soilphosphate from nature areas and reimport it into the mineral cycle agricultural farms. In a small scale experiment we have shown that grassclover with potassium fertilization can remove more than twice the amount of soil phosphate compared to mowing alone. We tested the methodology on 60 ha of grasslands in nature areas and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Soil.
Ano: 2014
URL: http://orgprints.org/28300/1/2936.pdf

Transport and reduction of nitrate in clayey till underneath forest and arable land.
Provedor de dados: Organic Eprints
Autores: Jørgensen, P.R.; Urup, J.; Helstrup, T.; Jensen, M.B.; Eiland, F.; Vinther, F.P.
Transport and reduction of nitrate in a typically macroporous clayey till were examined at variable flow rate and nitrate flux. The experiments were carried out using saturated, large diameter (0.5 m), undisturbed soil columns (LUC), from a forest and nearby agricultural sites. Transport of nitrate was controlled by flow along the macropores (fractures and biopores) in the columns. Nitrate reduction (denitrification) determined under active flow mainly followed first order reactions with half-lives (t1/2) increasing with depth (1.5–3.5 m) from 7 to 35 days at the forest site and 1–7 h at the agricultural site. Nitrate reduction was likely due to microbial degradation of accumulated organic matter coupled with successive consumption of O2 and NO3− in the...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/3373/1/J%C3%B8rgensen%2C_Urup%2C_Helstrup%2C_Jensen%2C_Eiland_%26_Vinther_2004.pdf

Entwicklung einer praxisanwendbaren Methode der Humusbilanzierung im ökologischen Landbau (Verbundvorhaben)
Provedor de dados: Organic Eprints
Die Humusversorgung acker- und gemüsebaulich genutzter Böden nimmt im ökologischen Landbau eine zentrale Stellung ein. Über die Fruchtfolge und den Stickstoffkreislauf sollte in Betrieben eine optimale Humusreproduktion gewährleistet werden, da ein Absinken der Humusgehalte unterhalb tolerierbarer Werte langfristig eine Abnahme der Bodenfruchtbarkeit und der Ertragspotentiale mit sich bringt. Aus verschiedenen Gründen ist es bisher sehr schwierig, den Humusstatus ackerbaulich genutzter Böden einzuschätzen oder Schlussfolgerungen zur Optimierung des betrieblichen Humusmanagements zu ziehen. Die bisher vorliegenden Instrumente zur Analyse der Humusversorgung (Messverfahren, Bilanzmethoden, Simulationsmodelle) wurden fast ausschließlich für die Bedingungen...
Tipo: Project description
Palavras-chave: Nutrient turnover; Composting and manuring; Soil tillage.
Ano: 2023

Nitrogen and sulphur management: challenges for organic sources in temperate agricultural systems
Provedor de dados: Organic Eprints
Autores: McNiel, A.M.; Eriksen, J.; Bergström, L.; Smith, K.S.; Marstorp, H.; Kirschmann, H.; Nilsson, I.
A current global trend towards intensification or specialization of agricultural enterprises has been accompanied by increasing public awareness of associated environmental consequences. Air and water pollution from losses of nutrients, such as nitrogen (N) and sulphur (S), are a major concern. Governments have initiated extensive regulatory frameworks, including various land use policies, in an attempt to control or reduce the losses. This paper presents an overview of critical input and loss processes affecting N and S for temperate climates, and provides some background to the discussion in subsequent papers evaluating specific farming systems. Management effects on potential gaseous and leaching losses, the lack of synchrony between supply of nutrients...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/5470/1/5470.pdf

Slagtesvin på friland kræver optimeret driftsledelse for at mindske miljøbelastningen
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Hermansen, J.E.
Ved produktion af svin på friland er det almindeligt at have søerne på græs, mens smågrisene ved fravænning sættes på stald med adgang til et betondækket udeareal. Det kan forekomme paradoksalt at en stor del af det økologiske svinekød stammer fra grise, som hovedparten af deres liv ikke har haft mulighed for naturlig adfærd i form af at rode, grave og græsse.    Når producenterne vælger ikke at have slagtesvin på friland hænger det blandt andet sammen med en række forventede negative effekter, såsom et stort arealkrav, stor arbejdsbelastning, stort foderforbrug og stort tab af næringsstof til omgivelserne. Der kan imidlertid stilles spørgsmål ved om den indendørs produktion af slagtesvin svarer til forbrugernes forventninger om dyrevelfærd i økologiske...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/5481/1/5481.PDF

Comparison of effect of zinc-enriched pod of Phaseolus vulgaris and inner rice husk composts with zinc sulphate and zinc 14% chelate on zinc availability in maize plant in a calcareous soil
Provedor de dados: Organic Eprints
Autores: Rasouli, Mrs. Shabnam; Azizi, Prof. Pirouz; Forghani, Dr. Akbar; Asghar Zade, Dr. Ahmad.
Mixtures of Zn salts and organic matter have been used successfully in controlling zinc deficiency in various crops. The aim of the present study was to optimize the effectiveness, on zinc availability in maize, of natural organic substances by enriching them with zinc sulfate. For this purpose pod of Phaseolus vulgaris and inner rice husk, as abundant organic wastes in the north of Iran, were incubated with increasing quantities of zinc sulphate. The effect of these zinc-enriched composts, zinc sulphate, and zinc 14% chelate on zinc availability in maize in a calcareous soil was studied in a greenhouse experiment. DTPA-extractable zinc of the soil, total zinc concentration, and chlorophyll of plant leaves were measured. Soil applications of all...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/12318/1/Rasouli_12318_ed.doc

Mekanisk jordløsning fjernede pløjesål men gav varierende effekt på udbyttet
Provedor de dados: Organic Eprints
Autores: Munkholm, Lars J.; Olesen, Jørgen  E.
Pakning af underjorden forekommer på en stor del af den dyrkede jord. Særligt er en rodhæmmende pløjesål et udbredt problem. Pakning af underjorden forringer kvantitet og kvalitet af afgrøderne, kan give problemer med færdsel på jorden under våde forhold og har negativ effekt på miljøet fx i form af øget risiko for N udvaskning. Danmarks JordbrugsForskning har i et FØJO-projekt undersøgt effekten af at løsne den rodhæmmende pløjesål i de økologiske sædskifteforsøg på Flakkebjerg og Foulum.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil; Soil quality.
Ano: 2004
URL: http://orgprints.org/7819/1/7819.PDF

Leguminosenkörnerschrote und andere vegetabile Dünger im Ökologischen Gemüsebau
Provedor de dados: Organic Eprints
Autores: Müller, Torsten; Riehle, Judith; Schlegel, Isabel; Li, Zhifang; von Schenck zu Schweinsberg - Mickan, Mario; Sabahi, Hossein; Schulz, Rudolf.
The potential of different plant based organic fertilisers (PBOF) to substitute animal based organic fertilisers (ABOF) in organic vegetable production were investigated in incubation, pot and field experiments. PBOFs have the potential to replace ABOFs. Particularly legume seed meals show fast net N-release even at low soil temperatures. Considerable differences in nitrate contents of vegetables can be found between the different fertilisers although fresh matter and N yields are nearly identical.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Vegetables; Composting and manuring.
Ano: 2007
URL: http://orgprints.org/9607/1/9607_M%C3%BCller_Vortrag.pdf

Stikstofvoorziening uit maaimeststoffen; bedrijfsontwerp.
Provedor de dados: Organic Eprints
Autores: van der Burgt, Geert-Jan.
Organic agriculture as system approach gains strength if it can produce its own nitrogen, more than what is now realized. This could be done by increased nitrogen fixation on both cattle farms and arable farms, combined with an increased nitrogen use efficiency. Because of these and other reasons, arable farmers can decide to reduce or stop the purchase of manure. Instead of this, cut-and-carry fertilizers could be used. Cut-and-carry fertilizers are alfalfa and grassclover, not sold but used on the farm as fertilizer.  This text reports on the design of an arable farm based on the use of alfalfa and grassclover as cut-and-carry fertilizer. This causes a shortage in the P-balance, which is compensated by the purchase of local available compost. The design...
Tipo: Report
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/21701/1/Stikstofvoorziening_uit_maaimeststoffen__bedrijfsontwerp.pdf

Simulating leaching losses following incorporation of grass and grass-clover leys
Provedor de dados: Organic Eprints
Autores: Berntsen, Jørgen; Petersen, B.M.; Pedersen, A.; Jensen, L.S.
Dynamic simulation models can be useful tools for predicting the residual effect of leys, but only if they have been calibrated and validated appropriately for this particular situation. The BIOMOD project has aimed at expanding, calibrating and validating two Danish dynamic simulation models, namely FASSET and Daisy, for a range of crop rotational situations occurring in organic farming. Here we report on the calibration results for an extensive experiment with residual effect and nitrate leaching following grass-clover leys.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Pasture and forage crops; Soil; Soil quality.
Ano: 2003
URL: http://orgprints.org/4635/1/4635.PDF

Soil biota in grassland, its ecosystem services and the impact of management
Provedor de dados: Organic Eprints
Autores: van Eekeren, N.; Murray, P.J.; Smeding, F.W.
In the search for sustainable grassland systems, self-regulating processes in the soil become increasingly important. Soil biota play an important role in these processes and in the provision of various ecosystem services. For grassland systems important ecosystem services are supply of nutrients, soil structure maintenance and water retention. For developing and optimising sustainable grassland systems, insight is needed into the mechanisms by which soil biota are influenced by management and what it means for the functioning of the soil-plant system. Interactions between soil and plants can be represented by a cyclic conceptual framework including plant/roots, soil biota and soil properties. The challenge for sustainable grassland is to allow this cycle...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology.
Ano: 2007
URL: http://orgprints.org/11112/1/1931_2.pdf

Plansjer Veileder til Jordlappen, stor og liten fil av samme plansjer
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun.
Bilder til 10 ulike indikatorer og sjekkpunkter i Jordlappen. Jordstruktur, Omdanning av planterester, vanninfiltrasjon, Plantevekt,Røtter, Biologiske nitrogenbinding, meitemark antall og arter...    Photos and figures to 10 different indicators and checkpoints to visual soil assessment on soil structure and biologi (Jordlappen).
Tipo: Teaching resource
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/34212/1/Veileder%20til%20Jordlappen%20plansjer%20final%202018%20primoPDFprint.pdf

Telen bij lage  fosfaatniveaus in de  biologische landbouw;  achtergronden en  literatuurstudie
Provedor de dados: Organic Eprints
Autores: Timmermans, B.G.H.; Sukkel, Wijnand; Bokhorst, J.G.
Fosfor bevindt zich in anorganische en organische vorm in de bodem. Beide lijken van belang voor plantenvoeding, maar over de verhouding waarin deze bronnen een rol spelen voor akkerbouw op kalkhoudende klei en zavelgronden is nog onvoldoende bekend. De huidige bodemanalyses worden verbeterd, maar er wordt vooral anorganisch fosfaat geanalyseerd. Planten hebben veel mechanismen om fosfaat op te nemen, maar het speelt zich allemaal heel dicht bij de wortel af en de meeste potentieel beschikbare fosfaat is daarom toch niet effectief beschikbaar. De bodemstructuur en beworteling bepalen het deel van de bodem dat toegankelijk is. Verzorging van de bodemstructuur en stimulering van het bodemleven zijn belangrijke maatregelen om bij lage fosfaatniveau ’s te...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Soil.
Ano: 2012
URL: http://orgprints.org/26454/1/2760.pdf

Engrais verts en interculture d’automne-hiver en plein champ - rapport final 2005
Provedor de dados: Organic Eprints
Autores: Védie, Hélène; Taulet, Annick.
La lutte contre les adventices et l’amélioration de la fertilité sont deux priorités en agriculture biologique : la culture d’engrais verts est une méthode permettant de concilier ces 2 objectifs. Les engrais verts permettent notamment d’introduire une biodiversité « interculturale » dans les rotations, de maintenir ou d’améliorer les qualités agronomiques et structurales des sols et de réduire l’enherbement.     Les essais conduits par le GRAB en 2003 et 2004 ont permis de sélectionner plusieurs types d’engrais verts qui sont particulièrement performants sur ce créneau : les crucifères (moutarde, navette) et certains mélanges graminées et légumineuses. Ces engrais verts permettent de bien limiter le développement des adventices, une production de biomasse...
Tipo: Report
Palavras-chave: Nutrient turnover; Soil quality; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/8720/1/engrais_verts.pdf

Udvaskning af organisk bundet kvælstof og kulstof
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.; Hansen, E.M.; Eriksen, J.; Jacobsen, O.H.
Nye forsøg har vist at der udvaskes organisk bundet kvælstof (org. N) og kulstof (org. C) i ikke helt ubetydelige mængder, og at udvaskningen af dette bl.a. afhænger af afgrøde og dyrkningsmetode. Ved lav nitratudvaskning, som f.eks. under en veludviklet efterafgrøde, udvaskes forholdsvis mere org. N end ved høj nitratudvaskning, og der udvaskes mere org. C fra en plantedækket jord end fra bar jord.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/4194/1/4194.pdf

Effect of different organic substrates on reproductive biology, growth and offtake of the African night crawler earthworm (Eudrilus eugeniae)
Provedor de dados: Organic Eprints
Autores: Kabi, Fred; Kayima, Denis; Kigozi, Abasi; Mpingirika, Eric Zadok; Kayiwa, Ronald; Okello, Dorothy.
Rapid growth and high fecundity of E. eugeniae makes it a commercial vermicomposting agent. The worm is also a rich protein source (50-70%CP) in livestock diets. The major question, however, is how do we promote earthworm production as a strategy for ecological livestock intensification and integration with crops through earthworm domestication as a source of protein and vermicompost. Reproduction characteristics, growth and offtake of E. eugeniae were studied using four organic substrates including abattoir waste (AW), cattle manure (CM), soya bean crop residue (SBCR) and a mixture of cattle manure and soya bean crop residue (CM+SBCR) aged for 15 days. Irrespective of the substrate, length and biomass of earthworms increased at a decreasing rate between...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Animal husbandry; Feeding and growth; Nutrient turnover; Biodiversity and ecosystem services; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/33629/3/7%20Fred%20Kabi%20Article.pdf

N-Freisetzung aus organischen Handelsdüngern – Übersicht und eigene Versuchsergebnisse im ökologischen Gemüsebau. [N-Mineralisation of organic  fertilizer - Review and own results in organic vegetable production]
Provedor de dados: Organic Eprints
Autores: Laber, Hermann.
Anfang der 90er Jahre setzte eine intensive Feld-Versuchstätigkeit zu Fragen der N-Düngung mit organischen Handelsdüngern ein. Dabei wurde in erster Linie, zumeist unter ökologischen Anbaubedingungen, die Ertragswirksamkeit verschiedener Dünger miteinander verglichen. Ergebnisse von Brutversuchen geben erste Hinweise auf das Mineralisationsverhalten, das unter Feldbedingungen bis dato kaum untersucht wurde. Hierzu werden eigene Versuchsergebnisse im Kontext mit den verfügbaren Literaturdaten vorgestellt.
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover; Vegetables.
Ano: 2003
URL: http://orgprints.org/887/1/kein%2Ddokument.pdf

Umsatz von Kompost N in einer biologischen Modellfruchtfolge   Ein Vergleich direkter und indirekter 15N Tracermethoden
Provedor de dados: Organic Eprints
Autores: Mayer, Jochen; Koeppe, Petra; Dubois, Ana.
In a five year organic model crop rotation the turnover of a homogeneously 15N labelled municipal waste compost was compared with an isotope dilution method. Results show an equivalence of compost N turnover estimations by direct 15N labelling with isotope dilution after 110 days, but lower estimation of isotope dilution after 474 days. Compost 15N recovery in crops was 15% after two years but most of compost N (65%) was stabilised in stable soil organic matter pools.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2011
URL: http://orgprints.org/17655/3/Mayer_17655.pdf

Einfluss der Stickstoffaufnahme verschiedener Zwischenfrüchte auf die Nitratverlagerung über Winter und die potentielle Stickstoffnachlieferung für die Folgefrucht
Provedor de dados: Organic Eprints
Autores: Stumm, Christoph; Rohling, Mike; Döring, Thomas.
In Feldversuchen mit verschiedenen Zwischenfrüchten (Phacelia, Grünroggen, Sandhafer, Winterrübsen, Ölrettich, Inkarnat- und Perserklee) wurde das Potenzial zur Reduzierung der Nitratauswaschung über Winter für alle nicht-legumen Arten bestätigt. Aufgrund vglw. hoher Verluste an Stickstoff aus der Sprossmasse über Winter sowie einem weiten C/N-Verhältnis der Zwischenfruchtreste (v.a. Stängel), scheint das Potenzial zur Steigerung der Nährstoffmineralisation im Frühjahr relativ gering sein.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Post harvest management and techniques; Farm nutrient management.
Ano: 2019
URL: http://orgprints.org/36045/1/Beitrag_112_final_a.pdf

Phosphorus mobilization in low-P arable soils may involve soil organic C depletion
Provedor de dados: Organic Eprints
Autores: Romanyà, Joan; Blanco-Moreno, José Manuel; Sans, F. Xavier.
Organic farming systems often show negative nutrient balances that may compromise the availability of phosphorus over the mid-term. Calcareous soils with low organic matter generally show low or very low phosphorus availability. Under these conditions, P retained in soil organo-mineral complexes -either in organic or inorganic forms-after its solubilization and -in the case of organic P compounds-subsequent mineralization may be a source of P to plants and soil organisms. By studying the changes in soil retained and soluble P pooloccurring during the growth of two legumes in two scenarios of contrasting P availability we aimed to describe the release of soil retained P, organic and inorganic, into the soluble pools and to relate it to changes in organic C...
Tipo: Journal paper
Palavras-chave: Soil biology; Nutrient turnover; Crop husbandry.
Ano: 2017
URL: http://orgprints.org/32463/1/Romany%C3%A0_et_al_2017_Low.phosphorus.and.soil.organic.carbon.depletion.pdf

Putsningens påverkan på N2-fixering, rhizodeposition, växtmaterialkvalitet och nedbrytning av leguminoser
Provedor de dados: Organic Eprints
För att kunna bedöma ett odlingssystems effektivitet och miljöpåverkan krävs bland annat tillförlitliga N-balanser. Baljväxternas totala N-bidrag genom N2-fixering, inklusive N i rötter och rhizodeposition (dvs. N som avges från rotsystemet, döda rötter och rotdelar), är dock föga känt. I N-balanser utesluts det därför ofta, eller ersätts med grova schabloner baserade på ovanjordisk biomassa, vilket kan leda till stora fel i N-balanserna. Projektet syftar till att i modellförsök klargöra N2-fixeringens och rhizodepositionens omfattning och betydelse, samt hur dessa påverkas av putsning.
Tipo: Project description
Palavras-chave: Nutrient turnover.
Ano: 2023

Nutrient cycling on organic farms
Provedor de dados: Organic Eprints
Autores: Goulding, Keith; Stockdale, Elizabeth; Fortune, Sharon; Watson, Christine.
This paper examines the sustainability of nutrient cycling on organic farms. After a brief consideration of the principles of nutrient cycling in organic agriculture, data on soil P and K indices and farm nutrient budgets is used to assess the integrity of nutrient cycling, including some consideration of losses to the environment. An attempt is made to assess the wider sustainability of organic farming in the context of the limited amount of recycling possible.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality.
Ano: 2000
URL: http://orgprints.org/8053/2/Goulding_Orgprints_8053.pdf

Accumulation and translocation of sparingly soluble manure phosphorus in different types of soils after long-term excessive inputs
Provedor de dados: Organic Eprints
Autores: Uustitalo, Risto; Ylivainio, Kari; Turtola, Eila; Kangas, Arjo.
When phosphorus (P) is applied to soils in excess of plant P demand, P accumulation takes place. By means of P fractionation, we studied the fate of P in 35 soils that had received long-term surplus P rates as fox and mink manure P (F&amp;MM-P), considered as a sparingly soluble P source. We compared these data with those from the same soils under a more typical P management, i.e., fields amended with soluble P sources superphosphate and dairy manure (SP+DM). Fractionation of manures according to the Hedley procedure suggested limited solubility of F&amp;MM-P, two-thirds of the F&amp;MM-P being soluble in acid (HCl) only. In mineral soils, surplus F&amp;MM-P accumulated for the most part as HCl-P (poorly available), whereas in organic soils accumulation...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2007
URL: http://orgprints.org/17085/1/uusitalo1.pdf

EFFECT OF AN IN-SEASON LIVING MULCH ON LEACHING OF INORGANIC NITROGEN IN CAULIFLOWER (BRASSICA OLERACEA L. VAR. BOTRYTIS) CROPPING IN SLOVENIA, GERMANY AND DENMARK
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne Lakkenborg; Campanelli, G.; Bavec, Franc; von Fragstein und Niemsdorff, Peter; Canali, S.; Tittarelli, F.
Vegetables with a high nitrogen demand such as cauliflower may cause intensive leaching of nitrate to the environment in conventional as well as in organic production. In organic cropping systems, the use of an in-season living mulch may decrease the risk of nitrate leaching after harvest when left growing in the field to the end of the leaching season in spring. The aim of this study was to investigate the effect of growing an in-season living mulch including legumes on the risk of leaching of inorganic nitrogen over winter, and soil nitrogen availability the following spring. Three field experiments were carried out in Slovenia, Germany and Denmark in the frame of the Interveg project (CORE organic II). Evaluation of soil inorganic nitrogen content was...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Air and water emissions; Vegetables; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/23981/1/23981%20Kristensen%20et%20al_Effect%20of%20living%20mulch%20on%20N%20leaching%20in%20cauliflower_MM.pdf

Anleitung zur P-, K-, Mg- und Kalk-Düngung im ökologischen Landbau [Instructions for phophorous, potassium, magnesium and lime fertilisation in organic agriculture.]
Provedor de dados: Organic Eprints
Autores: Kolbe, Hartmut.
In diesem Artikel steht vor allem die praktische Durchführung der P-, K-, Mg-Grunddüngung im Vordergrund.  Inhalt:  Einleitung  Checkliste zur Grunddüngung  Schlagkarteiaufzeichnungen  Bodenprobenahme und Laboruntersuchung  Gehaltsklassen für pflanzenverfügbare Bodennährstoffe  Düngungsbemessung mit dem Düngungsmodell BEFU  Analyse der Berechnungsergebnisse  Suche nach innerbetrieblichen Verbesserungsmöglichkeiten  Festlegung von Düngungsmaßnahmen  Durchführung der Verbesserungs- und Düngungsmaßnahmen
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/798/1/798%2Dkolbe%2Dh%2D2001%2Dgrundduengung.pdf

Ecological agriculture- a way towards sustainable agricultural practice
Provedor de dados: Organic Eprints
Autores: Znaor, Darko; Bošnjaković, Branko.
Today, and especially in the years to come, agriculture, as well as all other human activities, will have to pay much more attention to their environmental impacts. In other words, it is expected that in the near future only technologies which care about environmental aspects will be promoted and accepted by policy makers, scientists, consumers, and society in general. This is not surprising since the environmental problems are among the most urgent ones our civilization will have to tackle and solve. This demand for more careful stewardship of environment is also acknowledged by philosophy of sustainable development - a widely recognized concept and necessity of future development.     Although established at the very beginning of this century, ecological...
Tipo: Journal paper
Palavras-chave: "Organics" in general; Farming Systems; Nutrient turnover; Social aspects; Air and water emissions; Soil; Biodiversity and ecosystem services; Food systems; Policy environments and social economy; Environmental aspects.
Ano: 1996

Linking Soil Microbial Activity to Water- and Air-Phase Contents and Diffusivities
Provedor de dados: Organic Eprints
Autores: Schjønning, P.; Thomsen, I. K.; Moldrup, P.; Christensen, B. T.
Quantification of in situ soil microbial activity is indispensable in order to improve manipulation of nutrient turnover in soil and optimize crop nutrient supply. We sampled 100 cm3 cores of undisturbed arable soil at three locations along a naturally occurring clay gradient (L1: 11% clay; L3: 22% clay; L5: 34 % clay). The cores were drained to seven different matric potentials in the range –15 to –1500 hPa and gas diffusion determined prior to a 4 week incubation at 20oC in the dark. For all soils the net nitrification increased with water content to a maximum (L1: 12.1, L3: 10.3 and L5: 8.2 g NO3-N g-1 soil) and then decreased with further increase in water content. The water content at maximum nitrification was 0.26, 0.37 and 0.42 m3 m-3,...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/273/1/MS_S02%2D0112_text.doc

Ansätze zur PK-Düngungsberatung im ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Kolbe, Dr. Hartmut; Rikabi, Dr. Fouad; Albert, Dr. Erhard; Ernst, Dr. Hartmut; Förster, Frank.
Im ökologischen Landbau herrschen Unsicherheiten in Bezug auf eine fachgerechte Versorgung der Böden mit den Grundnährstoffen und der Düngungsbemessung. In dieser Arbeit werden die fachlichen Grundlagen sowie praktische Ansätze für den Aufbau von Bilanzierungs- und Düngungsbemessungs-Systemen für Phosphor und Kalium vorgestellt.
Tipo: Conference paper, poster, etc.
Palavras-chave: Environmental aspects; Nutrient turnover; Crop combinations and interactions; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/8873/1/20060522_Poster_FeldtagRoda_PK%2DGrunddgg%2DVerfahren.pdf

Nitrogen use efficiency of cereals in arable organic farming
Provedor de dados: Organic Eprints
Autores: Olesen, Jørgen E.; Rasmussen, Ilse A.; Askegaard, Margrethe.
The effect of nitrogen (N) supply and weeds on grain yield of spring barley, winter wheat and winter rye was investigated from 1997 to 2004 in an organic farming crop rotation experiment in Denmark on three soil types varying from coarse sand to sandy loam. Two experimental factors were included in the experiment in a factorial design: 1) catch crop (with and without), and 2) manure (with and without). The apparent recovery efficiency of N in grains (nitrogen use efficiency, NUE) from NH4-N in applied manure varied from 29 to 38% in spring barley and from 23 to 44% in winter cereals. The NUE of above-ground N in catch crops sampled in November prior to the spring barley varied from 16 to 52%, with the highest value on the coarse sandy soil and the lowest...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Composting and manuring.
Ano: 2008
URL: http://orgprints.org/12372/1/Olesen_12372_ed.doc

Effects of green manure storage and incorporation methods on greenhouse gas fluxes and N mineralization after soil application
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Sørensen, Peter; Petersen, Søren O.; Ambus, Per.
Organic arable farming faces challenges with low crop yields, partly due to inefficient use of green manure-derived nitrogen (N). Under current farming practices, green manure leys are often cut and mulched during the growing season with the associated risk of environmental N losses, leading to eutrophication and global warming. In this 3-month incubation experiment, we tested a new green manure management strategy as part of the ICROFS project HighCrop. With the new strategy, green manure leys are instead harvested and preserved until the following spring either as compost mixed with straw (grass-clover:straw, 4:1, w:w) or as silage of harvested ley biomass. In spring, these two green manure materials can then be used for targeted fertilization of spring...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2013
URL: http://orgprints.org/25941/19/25941a.pdf

Biokull-status for forskning og utprøving i Norge
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun.
Flere typer biokull testes for bruk i landbruksjord, for økt karbonlaging og med ønske om mer fruktbar og næringsrik jord. Biokull er et porøst strukturmateriale, laget av planterester som utsettes for høy temperatur uten tilgang på oksygen. Mye tyder på at en kombinasjon av biokull og organisk gjødsel gir flest fordeler.
Tipo: Web product
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions.
Ano: 2018
URL: http://orgprints.org/33002/1/biokull-status-for-forskning-og-utproving-i-norge

Ompløjning af afgræsningsmarker
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Mogensen, J.
I flerårige afgræsningsmarker sker en betydelig ophobning af kvælstof (N), som ved ompløjning kan frigives og resultere i en stor nitratudvaskning. Forsøg på en lerblandet sandjord viser, at når god landbrugspraksis følges (forårspløjning og brug af efterafgrøder) giver de flerårige græsmarker en betydelig forfrugtsværdi i to år efter ompløjning, uden at nitratkoncentrationen i udvaskningsvandet overstiger EU’s grænseværdi for drikkevand på 50 mg pr. liter.
Tipo: Report
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/232/1/Ompl%C3%B8jning_6si.pdf

Nitrous oxide emissions from organic farming: the importance of well-timed ley cultivation
Provedor de dados: Organic Eprints
Autores: Ball, B C.
The period after ploughing of grass-clover within a ley-arable rotation is when nitrogen accumulated during ley cropping is most vulnerable to loss. I investigated how date of ploughing and date of cessation of grazing before ploughing influenced losses of nitrogen as nitrous oxide during establishment of the first cereal crop. Crop nitrogen uptake was also assessed. Nitrous oxide (N2O) emissions in the 1-2 month period after autumn or spring ploughing or after sowing were typically between 20 and 150 g N ha-1 day-1 and increased with temperature and rainfall. Tillage and sowing operations on previously ploughed soil stimulated N2O emissions even several months after ploughing. Cumulative N2O emissions were highest (~8 kg ha-1 over 17 months) after late...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Soil tillage.
Ano: 2006
URL: http://orgprints.org/10261/1/Nitrous_oxide_emissions_from_organic_farming_%2D_the_importance_of_well%2Dtimed_ley_cultivation.pdf

Manual NDICEA 6.0.16
Provedor de dados: Organic Eprints
Autores: Burgt, G.J.H.M.; de Visser, Richard.
Manual til brug af NDICEA jordplante modellen oversat til dansk. Udover manualen findes en beskrivelse til hjælp til tolkning af modellens output.
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover; Soil.
Ano: 2013
URL: http://orgprints.org/29499/1/Manual%20NDICEA%206_2%20DK.doc

Species interactions between forbs and grass-clover contribute to yield gains and weed suppression in forage grassland mixtures
Provedor de dados: Organic Eprints
Autores: Cong, W.-F.; Suter, M.; Lüscher, A.; Eriksen, J.
Grass-legume mixtures characterized by high productivity, efficient nitrogen (N) use and strong weed suppression were proposed to increase sustainability of grassland production. Adding competitive forbs to grassclover mixtures can be expected to further enhance the high productivity of grass-clover mixtures. This study investigates whether and to what extent adding forbs to a grass-clover mixture results in yield gains, and estimates the contributions of forb species (identity effect) and interactions with the grass-clover mixture (diversity effect) to these gains. It further examines the effectiveness of weed suppression in forb-containing grass-clover mixtures. Fifteen pure and mixed stands, all comprising the grass Lolium perenne L. and the legume...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/34979/1/1-s2.0-S0167880918304006-main.pdf

ADAS: Field-scale study of sustainability of stockless organic arable production
Provedor de dados: Organic Eprints
Funded by Defra, covers 10ha in a five-course rotation, organic conversion completed in 1995. The aim of the project is to assess the sustainability of arable organic production with particular focus on a stockless rotation on a fertile soil.
Tipo: Research facility description
Palavras-chave: Nutrient turnover; Farm nutrient management; Crop husbandry.
Ano: 2023

CN-SIM - a model for the turnover of soil organic mattter. II: Short term carbon and nitrogen development
Provedor de dados: Organic Eprints
Autores: Petersen, B.M.; Jensen, L.S.; Berntsen, J.; Hansen, S.; Pedersen, A.; Henriksen, T.M.; Sørensen, P.; Trinsoutrot, I.
A computer model is presented, which describes the transformations of C and N in the soil. The development has been divided into two interdependent tasks, the first being development of long-term SOC simulation capabilities, and the second being short-term simulations of C and N, as described in this paper. A number of existing, independent laboratory experiments, covering a range of amendments, have been used for this task. The amendments includes a variety of different crop residues and animal manure. These experiments have included measurements of 13C, 14C and 15N in various pools, and the model facilitates the simulation of these isotopes. Non-linear, automated optimisation procedures were utilised wherever feasible. The model generally yielded good...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/88/1/88.pdf

Kvælstof til planteavlsafgrøder - prioritering af en begrænset ressource
Provedor de dados: Organic Eprints
Autores: Hermansen, Sven.
VI VED FRA forsøgene, at der er en meget stor respons pr. kg kvælstof, der kan stilles til rådighed til en kornafgrøde, når vi ligger med en tilførsel i områ­det 50-60 kg N. Landsforsøgene i 2018 viste en respons helt op til 20-25 kg kerne pr. kg N. Denne artikel fokuserer på nogle af de muligheder, der er for at forbedre og time kvælstofforsyningen til de afgrøder, der traditionelt godt kan blive snydt.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2019
URL: http://orgprints.org/35350/1/2019%2002%20%C3%98IJ%20Kv%C3%A6lstof.pdf

Nitratudvaskning fra økologiske og konventionalle planteavlsbedrifter - simuleringer med FASSET bedriftsmodellen
Provedor de dados: Organic Eprints
Autores: Berntsen, J.; Petersen, B.M.; Kristensen, I.S.; Olesen, J.E.
Med udgangspunkt i regnskabsdata fra Fødevareøkonomisk Institut (FØI) og data fra Centrale Registre (CR) blev importen af kvælstof (N) i gødning til marken til konventionelle og økologiske planteavlere estimeret til hhv. 129 og 51 kg N ha-1 år-1. Desuden blev der med udgangspunkt i den aktuelle afgrødefordeling opstillet et generelt sædskifte for hver af de to systemer. Det opstillede sædskifte for den økologiske planteavl havde en høj andel af vårsæd og desuden 20% kløvergræs, mens den konventionelle planteavl var domineret af kornafgrøder primært i form af vintersæd. Med baggrund i disse model-sædskifter blev N-balancen på markniveau beregnet ved anvendelse af FASSET modellen. Dette inkluderede også N-udvaskning og ændring i jordens Npulje. Alle...
Tipo: Report
Palavras-chave: Nutrient turnover; Production systems; Farming Systems; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/4605/1/4605.pdf

Stickstoffversorgung der Zweitfrüchte Feldgemüse und Mais nach Winterzwischenfrucht-Leguminosen
Provedor de dados: Organic Eprints
Autores: Haas, Guido; Brand, Heike; Puente de la Vega, Mireia.
Untersucht wurde die Stickstoffzufuhr mit dem Anbau von Leguminosen als Winterzwischenfrüchte (Zottelwicken, Inkarnatklee, Landsberger Gemenge, Wickroggen). Referenzvarianten waren Rübsen, Roggen und Gras in Reinsaat sowie Brache. In Feldversuchen an drei organisch bewirtschafteten Standorten im Rheinland wurden in den Jahren 2002 und 2003 die Zwischenfrüchte und Nachfruchtwirkung geprüft. Bestimmt wurden Ertrag (21 - 62 dt TM/ha), Stickstoffaufnahme (65 - 200 kg N/ha) und Netto-N-Fixierung (im Mittel 100 kg N/ha). Die Zwischenfrüchte wurden im Mai/Juni gemulcht oder beerntet. In den ersten Wochen nach Umbruch der Zwischenfrucht und Saat der Nachfrucht wurde der Verlauf der N-Mineralisierung im Boden gemessen (max. 50 - 180 kg Nmin-N/ha im Ap).   Der...
Tipo: Report
Palavras-chave: Nutrient turnover; Crop combinations and interactions.
Ano: 2004
URL: http://orgprints.org/16765/1/16765%2D02OE318%2Dble%2Duni_bonn%2D2004%2Dwinterzwischenfrucht_leguminosen.pdf

Nutrient cycle on organic farms: stall balance of a suckler herd and beef bulls
Provedor de dados: Organic Eprints
Autores: Haas, Guido; Wetterich, Frank; Köpke, Ulrich.
In organic agriculture, the internal farm nutrient cycle must be quantified to ensure high system productivity along with environmentally sound production processes. In contrast to common farmgate and field balances, budgeting at the stable level is seldom undertaken. When budgeting mixed farming systems, a substantial lack of nutrients can be detected in the nutrient flow chain "forage and straw input - stable - manure output". Therefore, stable balances focus on a central component of whole farm nutrient budgets for developing efficient nutrient management strategies. At the experimental farm for organic agriculture Wiesengut in Hennef, Germany, all solid mass flows for a suckler herd and a herd of beef bulls were measured. Relative balance values...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Beef cattle.
Ano: 2002
URL: http://orgprints.org/1165/1/handbuch%2Dkein%2DDokument.pdf

Tang som gjødsel
Provedor de dados: Organic Eprints
Autores: McKinnon, Kirsty; Holm, Aage; Henriksen, Trond.
Denne rapporten er en sammenstilling av ulike utprøvinger av tang som gjødsel, utført av Norsk senter for økologisk landbruk (NORSØK). Disse ble gjennomført som en del av et større prosjekt med tittelen «Alternative gjødselkilder i økologisk drift med lite eller ikke noe husdyrgjødsel». Dette prosjektet utførte NORSØK i perioden 1998–2000. Tangforsøket ble avsluttet i 2001. Sommeren 2000 ble det gjennomført en studietur rettet mot bruk av alternative næringskilder i økologisk landbruk og bruk av tang i landbruket. Erfaringene fra studieturen er oppsummert i en egen rapport(Holm &amp; McKinnon 2000). De delene av rapporten som berører bruk av tang og tare er gjengitt i denne rapporten.
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover; Soil; Biodiversity and ecosystem services.
Ano: 2004
URL: http://orgprints.org/30849/1/McKinnon%20Tang%20som%20gjodsel.pdf

Jordløsning i vækstsæsonen øger ikke N mineraliseringenen
Provedor de dados: Organic Eprints
Autores: Thomsen, Ingrid Kaag; Sørensen, Peter.
Jordbearbejdning foretages almindeligvis for at klargøre jorden til såning eller for at nedmulde planterester og gødning.     Ligeledes kan jordbearbejdning finde sted både i og uden for vækstsæsonen i forbindelse med mekanisk ukrudtsbekæmpelse.   Der er en udbredt opfattelse af, at ukrudtsbekæmpelse, foretaget fx ved radrensning af rækkeafgrøder i vækstsæsonen, også øger mineraliseringen af kvælstof. En øget kvælstofmineralisering formodes at finde sted som følge af, at den mekaniske bearbejdning bryder jordknolde, hvorved der blotlægges organisk materiale, som nedbrydes. Samtidigt fremmer jordbearbejdningen luftskiftet i jorden, og betingelserne for omsætning forventes dermed forbedrede.    En øget kvælstofmineralisering som følge af jordbearbejdning...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/4580/1/4580.PDF

Svovl til husdyrgødet vårbyg og forfrugtseffekt af græsmarker
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
For 20-30 år siden udgjorde nedfaldet af S fra atmosfæren op imod 40 kg/ha om året. En reduktion af forureningen fra afbrænding af olie og kul har sænket dette til under 10 kg, og planterne har derfor i dag et reelt behov for supplerende tilførsel af S. Der har dog været tvivl om nødvendigheden af S-tilførsel til husdyrgødet vårbyg, og i en række forsøg er der ikke opnået signifikante merudbytter. Det skal her kort opridses hvilke faktorer, der har betydning for, hvornår S-tilførsel er nødvendig.    Græsmarker, hvor plantematerialet bortføres ved slæt, har under normale omstændigheder en god kvælstofudnyttelse, og selv ved store gødningstilførsler efterlades kun ubetydelige mængder overskydende N. Som en følge heraf er N-udvaskningen efter slætgræsmarker...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/3178/1/Bilag_JE.doc

Leistungsfähigkeit von Merkmalen der Bodenfruchtbarkeit für das Nährstoffmanagement des ökologischen Landbaus
Provedor de dados: Organic Eprints
Autores: Kolbe, Dr. Hartmut.
In einem Vortrag wird eine Reihe von Merkmalen der Bodenfruchtbarkeit angesprochen, ob deren Methodik, fachliche Grundlagen und praktische Aussagen für die Bedingungen des Ökologischen Landbaus in Deutschland geeignet erscheinen. Für diese Überprüfungen fließen Ergebnisse aus über 10 Jahren ökologischer Forschung auf dem Ökofeld in Roda (Sachsen) sowie Auswertungsarbeiten von vielen konventionellen und ökologischen Dauerversuchen aus Mitteleuropa ein. Darüber hinaus werden wichtige Bestandteile zum Aufbau von Berechnungsverfahren zum Nährstoffmanagement aufgeführt. Im Einzelnen werden Merkmale folgender Verfahren einer näheren Untersuchung unterzogen:  - P- und K-Grunddüngung  - Humusbilanzierung  - N-Bilanzierung und N-Düngung.    Neben der...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop husbandry; Soil quality; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/8975/1/Vortr_16062006.ppt

Agregação e proteção física da matéria orgânica em Latossolo  Vermelho sob plantas de cobertura de inverno e sistemas de preparo do solo em  experimento de longa duração
Provedor de dados: Organic Eprints
Autores: AMADORI, C.
The soil management systems cause changes to the aggregation and the stock of soil organic matter (SOM). The aim was to evaluate the influence of the winter cover crops and the tillage systems in aggregation and carbon (C) stock in soil and SOM fractions. The experiment started in 1986 at the Agronomic Institute of Paraná, in Pato Branco, in an Oxisol. The treatments are a combination of winter cover crops: black oat, rye, hairy vetch, common vetch, oilseed radish, blue lupine, wheat and fallow, and tillage systems: no tillage (NT) and conventional tillage (CT), in split plot design with three replications. Soil samples were collected in November 2012, in layers 0-5, 5-10 and 10-20 cm. In study 1, the aggregate stability were performed through wet sieving...
Tipo: Thesis
Palavras-chave: Nutrient turnover; Soil tillage; Greenhouses and coverings.
Ano: 2014
URL: http://orgprints.org/29935/1/Amadori%2C%20Caroline_2014.pdf

Einfluss unterschiedlicher Bewirtschaftungsverfahren auf  P-Formen und P-Dynamik im Boden
Provedor de dados: Organic Eprints
Autores: Keller, Martina; Oberson, Astrid; Frossard, Emmanuel; Mäder, Paul; Mayer, Jochen; Bünemann, Else K.
The impact of cropping systems on soil phosphorus (P) forms and P dynamics was  studied. The systems were a biodynamic (DYN), a bioorganic (BIO), a conventional  (CON), a stockless system (MIN) and an unfertilized control (NON). These cropping  systems are part of the DOK field trial in Therwil near Basel. The systems differed in  fertilization and plant protection. The P budgets over 30 years were negative except  for CON and increased in the order: NON &lt; DYN &lt; ORG &lt; MIN &lt; CON. A sequential  P extraction scheme was used to characterize the P forms in soil samples from 2007  and 1977 (before the start of the trial). Labile inorganic P (Pi) forms differed significantly  between cropping systems. Organic P forms (Po) and stable Pi forms were not...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil; Composting and manuring.
Ano: 2009
URL: http://orgprints.org/14255/1/Keller_14255.pdf

Untersuchung der Auswirkungen von ökologisch erzeugten  Biogasgärresten auf Bodenqualität – Ein Methodeneignungstest
Provedor de dados: Organic Eprints
Autores: Simon, A.; Levin, Kain; Cyffka, L-S; Simon, R.; Reents, Hans Jürgen; Hülsbergen, Kurt-Jürgen.
Biogas digestate is a by-product of the biogas process and contains high amounts of nitrogen, which makes it a valuable organic fertiliser. In a field trial near Freising, different crop rotations for biogas production were established in 2004/05 and fertilised with digestate only or were not fertilised (controls). A wide range of methods for soil analysis was used between 2013 and 2015 to identify the methods capable of showing a biogas digestate effect on soil quality. We learned that aggregate stability, C and N contents, and the number of earthworms showed significant differences between fertilised and unfertilised plots, while pH, water infiltration, bulk density and pore size distribution were not able to show biogas effects.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31560/1/Untersuchung%20der%20Auswirkungen%20von%20%C3%B6kologisch%20erzeugten.pdf

Effet de la fertilisation organique sur la production de semences biologiques de deux variétés du haricot vert et sur les propriétés chimiques du sol
Provedor de dados: Organic Eprints
Autores: HAFID, Hicham.
L’essai a été réalisé sur la culture du haricot vert pour étudier l’effet de la fertilisation organique sur le rendement et la qualité des semences produites et sur les caractéristiques chimiques du sol.L’expérimentation a eu lieu dans une ferme biodynamique à Taroudant. La culture a été conduite sous tunnels nantais. L’essai a porté sur l’effet de trois fertilisants organiques (le compost, le fumier bovin et ovin) sur le rendement et la qualité des semences de deux variétés de haricot (Xera et Paulista). L’amélioration des caractéristiques chimiques du sol (matière organique, azote total, azote minéral, phosphore assimilable, bases échangeables et EC) de la parcelle expérimentale a été évaluée tout au long du cycle de la culture.Les résultats obtenus...
Tipo: Thesis
Palavras-chave: Nutrient turnover; Vegetables; Soil quality; Composting and manuring.
Ano: 2002
URL: http://orgprints.org/6530/1/HafidHicham02.pdf

Waste composts as nitrogen fertilizers for forage leys
Provedor de dados: Organic Eprints
Autores: Tontti, Tiina; Nykänen, Arja; Kuisma, Miia.
Two field experiments, conventional grass ley and organic grass-clover ley, were established with barley as a nurse crop in spring 2000 and given either low or high fertilization with mineral fertilizer (Mineral) or composts. The compost types were municipal biowaste (Biowaste), biowaste + sewage sludge (BioSludge) and cattle manure (Manure). Plant yields and nitrogen (N) uptakes were measured for three years and efficiency of N utilization was estimated. In single application of compost, the total N was mainly in organic form and less than 10% was in inorganic form. Along with increasing amount of inorganic N applied in compost, the yield, N uptake and N recovery increased during the application year. The highest compost N recovery in the application year...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2009
URL: http://orgprints.org/16627/1/tontti.pdf

Amino acids in dew - origin and seasonal variation
Provedor de dados: Organic Eprints
Autores: Scheller, Edwin.
At two sites in the Armenhof district, 10 km east of Fulda, Germany, dew samples were collected from June 1996 to June 1997 and investigated for free and protein bound amino acids. On account of the high pollen content, at the beginning of June 1996 and in May 1997 total amino acid concentrations were 53 – 390 µmol/l, in one sample 922 µmol/l. At other times the concentration in dew was 8 to 164 µmol/l. On 4 and 5 June 96 the diluted free amino acid fraction (DFAA) of the total hydrolyzed amino acids (THAA) at both sites amounted to 35 – 44% and was predominantly arginine, proline and glutamine/glutamate. Likewise on 11th  of March 97 the fraction of  DFAA was found to be 39.5% with extremely high arginine and proline fractions. At other times the...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil.
Ano: 2001
URL: http://orgprints.org/1077/1/kein%2DDokument.pdf

Kvælstofmanagement på store økologiske kvægbrug
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Askegaard, M.; Søegaard, K.
Store økologiske besætninger kræver meget kløvergræs tæt på gården. Udnyttelse og tab af kvælstof i disse græsintensive sædskifter kan kontrolleres af management. I græsmarken kan afgræsningsperioden eller gødningstilførsel reduceres, og efter ompløjning af græs kan grønbyg med italiensk rajgræs reducere udvaskningen til at minimum.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16294/1/16294.pdf

Digestibility in selected rainbow trout families and modelling of growth from the specific intake of   digestible protein
Provedor de dados: Organic Eprints
Autores: Rasmussen, Richard; Jokumsen, Alfred.
The experiments aimed to clarify variations in digestibility of dietary nutrients in rainbow trout. Furthermore, the objective was to study how differences in digestibility might be related to growth and feed utilisation at various growth rates.  When comparing the results from the experiments it appeared that particularly protein digestibility was closely related to specific growth rate and feed conversion ratio at high growth rates. As a tool to visualise the relationship between protein digestibility and growth of rainbow trout a growth model was developed based on the specific intake of digestible protein, and general assumptions on protein content and protein retention efficiency in rainbow trout. The model indicated that increased protein...
Tipo: Journal paper
Palavras-chave: Technology assessment; Feeding and growth; Nutrient turnover; Research methodology and philosophy; Farm nutrient management.
Ano: 2008
URL: http://orgprints.org/18750/1/18750.pdf

Fertility building strategies during the conversion period – assessment of performance in a stockless field vegetable rotation
Provedor de dados: Organic Eprints
Autores: Rayns, Francis W; Harlock, Simon; Turner, Rebecca J.
This report was presented at the UK Organic Research 2002 Conference of the Colloquium of Organic Researchers (COR). Nutrient off-takes, residue returns and nutrient inputs were measured during and after conversion from a conventional arable system to organic vegetables with cereals. This data was used to construct nutrient budgets to assess the effectiveness of contrasting fertility building strategies and various cropping regimes. The effect of placing the cereal crops in different places in the crop sequence was also considered.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil; Farm nutrient management.
Ano: 2002
URL: http://orgprints.org/8301/1/rayns_Fertility_building_conversion.pdf

Early maize root and phosphorus uptake responses to localised application of sewage sludge derived fertilisers
Provedor de dados: Organic Eprints
Autores: Lemming, Camilla; Oberson, Astrid; Hund, Andreas; Stoumann Jensen, Lars; Magid, Jakob.
Background: Phosphorus recycling from waste and localised placement of fertilisers can be means to improve sustainable P management in agriculture. However, knowledge about root and plant P uptake responses to placement of complex waste- derived fertilisers is lacking.  Methods: Sewage sludge (SS) and sewage sludge ash (ASH) were tested against triple superphosphate (TSP) in a rhizobox setup where shoot and root growth of maize was followed for 30 days. The three P sources were either mixed homogenously into the soil (labelled with 33P) or localised in a patch close to the seed.  Results: While localised TSP and SS both increased root length density around the fertiliser patch, it was at the expense of the remaining root system and soil P uptake for SS....
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/29273/7/29273.pdf

Short-term effect of soil disturbance by mechanical weeding on plant available nutrients in an organic vs conventional rotations experiment
Provedor de dados: Organic Eprints
Autores: Owen, D; LeBlanc, S; Fillmore, S A E.
The question whether soil disturbance from mechanical weeding in organic systems affects nutrient release from organic matter in compost-amended soil was examined in a long-term organic-versus-conventional rotational cropping system experiment over three years. The experimental design included continuous snap beans, and a fully phased snap beans/fall rye crop rotation sequence. Treatments were combinations of yearly applied fertiliser (synthetic fertiliser, 1× compost, 3× compost) and weed control (herbicide, mechanical weeding). The 1× compost rate was calculated to deliver the equivalent of 50 kg N ha-1: equal to the rate ofN in the synthetic fertiliser treatments. Ion exchange membranes were buried for 24 hours following mechanical weeding in bean...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Weed management; Soil tillage.
Ano: 2006
URL: http://orgprints.org/10258/1/Short%2Dterm_effect_of_soil_disturbance_by_mechanical_weeding_on_plant_available_nutrients_in_an_organic_vs_conventional_rotations_experiment.pdf

Phosphor- und Kalium-Bilanzen über 35 Jahre DOK-Versuch &amp;  geschätzte K-Nachlieferungsraten auf einem Lössboden
Provedor de dados: Organic Eprints
Autores: Jarosch, KA.; Gunst, Lucie; Dubois, David; Mäder, Paul; Mayer, Jochen.
We calculated a phosphorus (P) and potassium (K) balance for the DOK-trial (Therwil, Switzerland) for a 35-years cropping period. In the DOK-trial, three cropping systems (D: biodynamic, O: bioorganic and K: conventional) are maintained on both a full (2) and a halved (1) fertilization level. Additionally, a treatment with no fertilization (N) and mineral fertilization (M; since 1985) are included. Balance inputs included fertilization, deposition, nutrients inputs by seeds, while in the outputs removal of nutrients by harvested plant material and leaching was considered. For P, the balance was positive for treatment M and treatment O2, but negative for the other treatments. The K-balance was positive only for treatment M, while treatments D2, O2 and K2...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31861/1/Phosphor-%20und%20Kalium-Bilanzen%20%C3%BCber%2035%20Jahre%20DOK-Versuch.pdf

Stickstoffversorgung im Freiland-Gemüsebau
Provedor de dados: Organic Eprints
Autores: Koller, Martin; Lichtenhahn, Martin.
Das im Biolandbau angestrebte Ideal eines möglichst geschlossenen innerbetrieblichen Nährstoffkreislaufes können viele Biogemüsebaubetriebe nicht erfüllen. Vor allem viehlose Betriebe haben Schwierigkeiten, eine betriebsinterne N-Versorgung zu erreichen und müssen den N-Bedarf anspruchsvoller Gemüsearten mit organischen Handelsdüngern ergänzen.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Vegetables; Composting and manuring.
Ano: 2004
URL: http://orgprints.org/2742/1/koller%2Dlichtenhahn%2D2004%2DDuengung_der_Gemuesebauer.pdf

Nitratudvaskning fra majs
Provedor de dados: Organic Eprints
Autores: Hansen, E.M.; Eriksen, J.
Gennem de sidste 20 år er majsarealet i Danmark steget kraftigt, og i 2008 blev der dyrket majs på 163.000 ha. Majs til ensilage er let at dyrke og passer godt ind i en foderplan med kløvergræs til malkekøer. Majs indgår derfor ofte i sædskifter med kløvergræs på sandet jord. Ompløjning af kløvergræs udgør en risiko for øget udvaskning af nitrat fra grovsandet jord, selv hvis der pløjes om foråret. Med den øgede majsdyrkning er der behov for effektive strategier til at reducere nitratudvaskningen i majs efter ompløjning af kløvergræs. I FØJO III-projektet OrgGrass har vi undersøgt effekt af efterafgrøde og gylletilførsel på nitratudvaskning fra majs efter forårspløjet kløvergræs.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/17873/1/17873.pdf

Klimawirkung und Nachhaltigkeit ökologischer Betriebssysteme - Untersuchung in einem Netzwerk von Pilotbetrieben
Provedor de dados: Organic Eprints
Im Verbundprojekt „Klimawirkungen und Nachhaltigkeit ökologischer und konventioneller Betriebssysteme – Untersuchungen in einem Netzwerk von Pilotbetrieben“ wurde in enger Kooperation von Forschung, Beratung und Praxis eine einzigartige Struktur für Forschungsarbeiten aufgebaut. In verschiedenen Agrarräumen Nord-, West-, Ost- und Süddeutschlands sind 40 ökologische und 40 konventionelle landwirtschaftliche Betriebe nach definierten Kriterien ausgewählt worden. Sie repräsentieren unterschiedliche Betriebstypen, Intensitätsniveaus und Standortbedingungen. In den Pilotbetrieben wurden nach genau definierten methodischen Vorgaben mehrjährig Betriebsdaten erfasst, mit Modellen umfassend ausgewertet sowie Monitoringsysteme mit georeferenzierten Testflächen...
Tipo: Report
Palavras-chave: Dairy cattle; Nutrient turnover; Air and water emissions; Technology transfer; Biodiversity and ecosystem services.
Ano: 2013
URL: http://orgprints.org/32172/1/32172-06OE160-353-tum-ti-huelsbergen-2013-klimawirkungen-pilotbetriebe-teil1.pdf

Ekologisk jordbruks- och trädgårdsproduktion, Formasprogrammet 2001-2004 - markvetenskap
Provedor de dados: Organic Eprints
Regeringen gav våren 2001 Forskningsrådet för miljö, areella näringar och samhällsbyggande (Formas) 69 miljoner kronor för ett treårigt forskningsprogram om ekologisk jordbruks- och trädgårdsproduktion. Pengarna delades ut till 23 projekt inom insatsområdet ekologisk produktion.
Tipo: Research Programme description
Palavras-chave: Nutrient turnover; Soil biology.
Ano: 2023

Untersuchungen zur Wirkung einer einmalig variierten Bodenbearbeitung auf Ertragsbildung, Verunkrautung und Nitratauswaschung unter den Produktionsbedingungen des Ökologischen Landbaus
Provedor de dados: Organic Eprints
Autores: Häberle, Annette; Pekrun, Carola; Claupein, Wilhelm; Köhler, Stefan; Stahr, Karl; Römheld, Volker.
Einleitung   Nitrat als Pflanzennährstoff trägt zu erheblichen Belastungen des Trinkwassers in vielen landwirtschaftlich genutzten Wassereinzugsgebieten bei. Eine Reduzierung dieser Nitratausträge von Seiten der Landwirtschaft gestaltet sich durch komplexe Zusammenhänge von Standortfaktoren, Bewirtschaftungsweisen und unterschiedlichen Düngungstechniken sehr schwierig. Der Ökologische Landbau stellt eine Bewirtschaftungsweise dar, die gänzlich auf den Einsatz chemisch-synthetischer Pflanzenschutzmittel verzichtet, doch Austräge von Nitrat mit dem Sickerwasser sind auch hier zu finden. Die Neufassung der Schutz-und Ausgleichsverordnung (SchALVO), verabschiedet im Februar 2002, ist darauf ausgerichtet, Nitratausträge von landwirtschaftlich genutzten Flächen...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Weed management; Soil tillage.
Ano: 2003
URL: http://orgprints.org/8990/1/H%C3%A4berlePosterPb2003.pdf

Erhöhte Bodenfruchtbarkeit durch reduzierte Bodenbearbeitung im Langzeitversuch Frick
Provedor de dados: Organic Eprints
Autores: Mäder, Paul; Berner, Alfred; Niggli, Urs.
Weltweit ging in den vergangenen 40 Jahren etwa 1/3 des wertvollen Ackerlands durch Erosion verloren. Angesichts der Nahrungsmittelknappheit ist diese Entwicklung dramatisch, und es müssen neue Wege zur Lösung dieses Problems beschritten werden. Durch tiefes Pflügen wird wertvoller Humus abgebaut, der Boden erodiert, und das klimarelevante Gas CO2 wird freigesetzt. Pfluglose, konservierende Anbausysteme bieten Vorteile bei der Erosionsbekämpfung und bei der Förderung der Bodenfruchtbarkeit. Insbesondere können sie zum Humusaufbau beitragen und sparen Energie. Diese Anbausysteme wurden aber unter den Bedingungen des konventionellen Landbaus unter Einsatz von Herbiziden und Mineraldüngern entwickelt. Diese belasten die Umwelt und benötigen zu deren...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage.
Ano: 2009
URL: http://orgprints.org/26612/1/verein_jt09_abstractband.pdf

PlantyOrganic; Results 2014
Provedor de dados: Organic Eprints
Autores: Hospers-Brands, A.J.T.M.; Pollema, Thomas; Bus, Michiel.
2014 was the third year of the "Planty Organic" system development in practice. The six-year rotation is laid out and measurements took place at soil and crop. The fertilizers used were completely produced in the own system, as foreseen in the system design. The nitrogen fixation by the grass clover, the motor of the system, did not meet the expected levels. The amounts of nitrogen applied were therefore about 20% lower than foreseen in the design. Soil nitrogen is measured and used as input in the nitrogen model NDICEA. There was a sufficient match between measured and calculated level of soil mineral nitrogen, with exception of the cereals where measured values of soil mineral nitrogen were consistently lower than the calculated levels. This showed also...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Soil.
Ano: 2015
URL: http://orgprints.org/28778/1/2982.pdf

Eignung verschiedener Zwischenfrüchte als Vorfrüchte für die Ertrags- und Qualitätsleistung von Mais und Kartoffeln
Provedor de dados: Organic Eprints
Autores: Kolbe, Dr. Hartmut.
Zur Verbesserung des Nährstoffmanagements und zur Ausnutzung von Vorfruchteffekten wurden verschiedene Zwischenfrüchte zur Gründüngung unter den kontinentaleren Bedingungen des Öko-Feldes in Roda (Sachsen) geprüft. Ergebnisse von 2 dreijährigen Feldversuchen werden in diesem Poster vorgestellt.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Root crops.
Ano: 2006
URL: http://orgprints.org/8878/1/20060524_Poster_FeldtagRoda_ZFruechte.pdf

Modelling diverse root density dynamics and deep nitrogen uptake
Provedor de dados: Organic Eprints
Autores: Pedersen, Anders; Zhang, Kefeng; Thorup-Kristensen, Kristian; Jensen, Lars Stoumann.
We present a 2-D model for simulation of root density and plant nitrogen (N) uptake for crops grown in agricultural systems, based on a modification of the root density equation originally proposed by Gerwitz and Page (1974). A root system form parameter was introduced to describe the distribution of root length vertically and horizontally in the soil profile. The form parameter can vary from 0 where root density is evenly distributed through the soil profile, to 8 where practically all roots are found near the surface. The root model has other components describing root features, such as specific root length and plant N uptake kinetics. The same approach is used to distribute root length horizontally, allowing simulation of root growth and plant N uptake...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16106/1/16106.pdf

Kalkulation der N-Düngung im ökologischen Gemüsebau
Provedor de dados: Organic Eprints
Autores: Laber, Hermann.
Ausgehend von Literaturdaten wurde für den ökologischen Gemüsebau ein Kalkulationsschema zur Berechnung des N-Angebots zusammengestellt, das die für dieses Anbausystem so wesentlichen N-Quellen Gründüngung sowie Wirtschafts- und organische Handelsdünger detaillierter als bisher verfügbare Kalkulationsmodelle einbezieht. Für alle Umsetzungsprozesse wurden vereinfachend gleichmäßige Mineralisationsraten angenommen. Unter kühlen Bodenbedingungen (März und April bzw. September und Oktober) geht das Modell von einer Halbierung der Umsatzraten aus.  Zur Evaluierung dieses Kalkulationsschemas wurden in den Jahren 1998 bis 2001 Versuche mit Spinat sowie Weißkohl, Blumenkohl und Brokkoli (2´) angelegt. Dabei wurde das N-Angebot durch unterschiedliche Gründüngungen...
Tipo: Report
Palavras-chave: Nutrient turnover; Vegetables; Composting and manuring.
Ano: 2002
URL: http://orgprints.org/865/1/865%2Dlaber%2Dh%2D2002%2Dkalkulation%2Dn%2Dduengung.pdf

Intercropping leek (Allium porrum L.) with dyer’s woad (Isatis tinctoria L.) increases rooted zone and agro-ecosystem retention of nitrogen.
Provedor de dados: Organic Eprints
Autores: Xie, Yue; Kristensen, Hanne Lakkenborg.
Nitrate leaching can be high in organic vegetable production. Late-harvested crops like leek limit the use of autumn catch crops. The aim of this study was to investigate the growing of a combination of a deep-rooted catch crop and a shallow-rooted vegetable to reduce the risk of nitrate leaching. We compared a leek sole crop (S) with two intercropped systems of leek and early-sown dyer’s woad (five weeks after leek planting) (IE) or late-sown dyer’s woad (eight weeks after leek planting) (IL) in two seasons: 2012 and 2013. To reveal root and resource competition, leek with dyer’s woad rows left empty (Semp), and early and late-sown dyer’s woad with leek rows left empty (DEemp, DLemp) were included. Yield, dry above-ground biomass, aboveground N...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Air and water emissions; Vegetables.
Ano: 2017
URL: http://orgprints.org/32017/1/Xie%20%26%20Kristensen_Intercropping-leek_2017_European-Journal%20of%20Agronomy.pdf

Duurzaam bodembeheer maïs: Maïs en Bodem jaarrapport 2016.
Provedor de dados: Organic Eprints
Autores: Riemens, Marleen; Huiting, H.; Deru, Joachim; Schooten, H.A. van; Weide, R.
Hoe kunnen veetelers met minder input meer resultaten halen bij snijmaïsteelt? Dat is de centrale vraag van het project “Duurzaam bodembeheer maïs” (BO-31.03-001-003). Veel melkveehouderijbedrijven telen snijmaïs, een gemakkelijk te telen ruwvoergewas met een goede productie van constante hoge kwaliteit. Als zetmeelbron met een ruime energie/eiwitverhouding past het goed in het runderdieet, naast gras en graskuil. De maïsteelt kan echter nadelige effecten hebben voor de bodem door gewasbeschermingsmiddelen en het uit- en afspoelen van nutriënten. Wageningen UR en het Louis Bolk Instituut onderzoeken in opdracht van het ministerie van EZ duurzame en praktisch haalbare verbeteringen en vernieuwingen. Teeltsystemen die zorgen voor een gezonde bodem worden...
Tipo: Report
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover; Crop husbandry; Soil.
Ano: 2017
URL: http://orgprints.org/36535/1/3261.pdf

Inclusion of caraway in the ryegrass-red clover mixture modifies soil microbial community composition
Provedor de dados: Organic Eprints
Autores: Cong, W.-F.; Jing, J.; Søegaard, K.; Eriksen, J.
Perennial ryegrass-clover mixtures are widely used in intensively managed grasslands due to their high biomass production. Recent studies have shown that inclusion of competitive forbs such as plantain enhanced above-and below-ground biomass of ryegrass-red clover mixtures (Cong et al., 2016), while inclusion of forbs such as caraway in the grass-clover mixture largely maintained the herbage yield. Meanwhile, inclusion of forbs increases plant litter diversity, which could change root quality of the plant community. Hence, changes in quantity and quality of root litter in forb-containing grass-clover mixtures may potentially affect soil microbial community structure, biomass and associated ecosystem functions, but it is yet to be elucidated. We...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/34985/1/ipnc2017_abstract_wenfeng%20cong_final.docx

The effects of different cattle manure levels and branch management methods on organic production of Cucurbita pepo L.
Provedor de dados: Organic Eprints
Autores: Jahan, Instructor Mohsen; Koocheki, Professor Alireza; Nassiri Mahallati, Associated Prof. Mehdi; Dehghanipur, Instructor Forugh.
To study the effects of different manure levels and two branch management methods on organic production of Schneider squash, a field experiment was conducted during 2005 and 2006. Treatments were four manure levels (10, 15, 20, 25 ton ha-1) and two branch management methods (with and without a wood pole), which were allocated to main plots and subplots, respectively. Results showed that the crop performed better in branch management without a wood pole than with a wood pole. Results showed that in the first year, manure level had a significant effect on fruit and seed yields. However, these traits were not significantly affected by manure levels in the second year. For both years, there were no differences in seed numbers due to manure levels. Seed oil...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/11437/1/Jahan_11437_ed.doc

Implications of grazing by sows for nitrate leaching from grassland and the succeeding cereal crop
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Outdoor pig production may have benefits in terms of animal welfare but could be undesirable in terms of nutrient losses. In paddocks on sandy soil grazed by lactating sows, nitrate leaching was determined using the suction cup technique from the start of grazing in October to after the following barley/pea wholecrop with perennial ryegrass. The inorganic N concentration in soil was uneven after sow grazing with the highest values found near the feeding area. In contrast to low nitrate leaching in the year of grazing (25-30 kg N ha-1), losses were considerable in the following autumn and winter. Throughout the measuring period of 18 months, nitrate leaching inside paddocks was on average 320 kg N ha-1 with the major part near the feeding area. Ten m from...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/158/1/GFS2757.doc

Winter wheat roots grow twice as deep as spring wheat roots, is this important for N uptake and N leaching losses?
Provedor de dados: Organic Eprints
Autores: Thorup-Kristensen, Kristian; Cortasa, Montserrat Salmerón; Loges, Ralf.
Cropping systems comprising winter catch crops followed by spring wheat could reduce N leaching risks compared to traditional winter wheat systems in humid climates. We studied the soil mineral N (Ninorg) and root growth of winter- and spring wheat to 2.5 m depth during three years. Root depth of winter wheat (2.2 m) was twice that of spring wheat, and this was related to much lower amounts of Ninorg in the 1 to 2.5 m layer after winter wheat (81 kg Ninorg ha-1 less). When growing winter catch crops before spring wheat, N content in the 1 to 2.5 m layer after spring wheat was not different from that after winter wheat. The results suggest that by virtue of its deep rooting, winter wheat may not lead to high levels of leaching as it is often assumed in...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farm nutrient management; Crop husbandry; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16121/2/16121.pdf

Legume based plant mixtures for delivery of multiple ecosystem services: An overview of benefits
Provedor de dados: Organic Eprints
Autores: Döring, Thomas F.; Baddeley, J. A.; Brown, RJ; Collins, R; Crowley, Oliver; Cuttle, Steve; McCalman, Heather; Pearce, Bruce; Roderick, Stephen; Stobart, Ron; Storkey, Jonathan; Watson, Christine; Wolfe, Martin; Jones, H E.
As costs for mineral fertilizers rise, legume-based leys are recognised as a potential alternative nitrogen source for crops. Here we demonstrate that including species-rich legume-based leys in the rotation helps to maximize synergies between agricultural productivity and other ecosystem services. By using functionally diverse plant species mixtures these services can be optimised and fine-tuned to regional and farm-specific needs. Field experiments run over three years at multiple locations showed that the stability of ley performance was greater in multi-species mixtures than in legume monocultures. In addition, mixing different legume species in the ley helps to suppress both early and late weeds. Further, combining complementary phenologies of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Pasture and forage crops; Nutrient turnover; Biodiversity and ecosystem services.
Ano: 2012
URL: http://orgprints.org/20718/1/Doring_et_al_2012_Legume_mixtures_for_ecosystem_service_delivery_%2D_overview.pdf

Quantifizierung der N-Rhizodeposition von Leguminosen in einem Gefäßversuch unter Gewächshaus- und Freilandbedingungen
Provedor de dados: Organic Eprints
Autores: Landgraf, Anke; Schmidtke, Knut.
The N rhizodeposition of legumes is defined as the N release into the soil via roots during the growth of the plant. The aim of the experiment presented here was to estimate the N rhizodeposition of red clover and pea using 15N labelling split-root technique in pot experiments under greenhouse and field conditions. The proportion of total N rhizodeposition of the total plant-N was not significantly affected by the tested factors. It amounted between 7 % to 19 % and 9 % to 10 % for plants grown under greenhouse and between 4 % to 11 % and 10 % to 15 % under field conditions for red clover and pea, respectively. In the experiment the absolute amount of N derived from rhizodeposition [mg pot-1] was in the first year tendential and in the following year...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2013
URL: http://orgprints.org/21524/1/21524_Landgraf.pdf

LIVESTOCK IN ORGANIC FARMING – HOW IMPORTANT IS IT FOR SOIL FERTILITY MANAGEMENT?
Provedor de dados: Organic Eprints
Autores: Schulz, Franz; Brock, Christopher; Leithold, Günter.
Stockless management is increasing even in organic farming, but it is not known until now, whether organic matter supply is sufficient in such systems, or which measures are necessary to achieve a sustainable soil organic matter (SOM) management. Results from the long-term Organic Arable Farming Experiment Gladbacherhof (OAFEG) show that after two 6 y rotations, only a “mixed farm” treatment (MF) with fodder legumes in the rotation and cattle manure application corresponding to 1 LU ha-1 was able to maintain, and in the long term perhaps increase, SOM levels. The “stockless farm” with fodder legumes as green manure ley (SFL) was barely able to maintain the SOM level, while the “stockless cash crop farm” where organic matter supply relied on green manure...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/23963/1/23963_MM.pdf

Nitrogen Supply and Management in Organic Farming
Provedor de dados: Organic Eprints
Autores: Briggs, Stephen.
This topic review aims to summarise knowledge and experience of Nitrogen supply and management in organic farming systems, including : Nitrogen fixation; Nitrogen recycling; the effect of the length of the fertility building phase or ley and the effect of green cover management; green manures – type and management; soil management; the impact of undersowing; seasonality of crops and the impact of manure use and management. It is based on a review of the organic research commissioned by Defra and that undertaken elsewhere and incorporates field experiences in the conclusions.
Tipo: Report
Palavras-chave: Nutrient turnover; Farm nutrient management; Composting and manuring.
Ano: 2008
URL: http://orgprints.org/13557/1/Res_Review_2a_briggs.pdf

Alger og fiskebein kan brukes som økologisk gjødsel
Provedor de dados: Organic Eprints
Autores: Land, Anita Marlene.
Omtale av prosjektet «Restråstoffer fra havet som gjødsel til økologisk landbruk» (RESTOR) i perioden 2017-2020
Tipo: Web product
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/33878/1/Alger%20og%20fiskebein%20kan%20brukes%20som%20%C3%B8kologisk%20gj%C3%B8dsel%202018%20AL.pdf

Effect of  Some Nutrient Applications on Plant Properties  in Organic Strawberry Production
Provedor de dados: Organic Eprints
Autores: Atasay, Adem; Türemiş, Nurgül.
This study was conducted with the “Camarosa” strawberry cultivar at the Egirdir Horticultural Research Institute between 2004 and 2006. In these experiments, the impact of some nutrition applications upon plant development in conventional and organic production has been analyzed. The planting has been performed with frigo plants in the third week of July and black plastic mulch was used for mulch system and dripping method was used for watering system in the experiment. When evaluating the data of two years statistically according to plant width, plant stem number, leaf number and root length, the difference in both applications and years has given importance.
Tipo: Journal paper
Palavras-chave: Farming Systems; Nutrient turnover.
Ano: 2009
URL: http://orgprints.org/19111/1/EFFECT_OF_SOME_NUTRIENT_.pdf

Organic Arable Systems at ADAS Terrington OF0112
Provedor de dados: Organic Eprints
Autores: Cormack, Dr W F.
Project OF0112 contributes to MAFF's main policy focus of encouraging conversion to organic farming methods.  It is part of a long term rotational study that began in 1990 as OF0102 and has recently been extended to 2001 as OF0145.  The overall objective of these three projects is to evaluate the cost of conversion to organic arable production on a fertile soil, to assess the physical and financial performance of the organic rotation, to identify and overcome limitations to sustainabilty and to compare the results with conventional arable production.  The project comprises a field-scale unreplicated systems comparison and associated replicated experiments at ADAS Terrington, and a financial analysis of ten commercial 'linked' organic farms.    The silty...
Tipo: Report
Palavras-chave: Nutrient turnover; Production systems; Farm nutrient management.
Ano: 1998
URL: http://orgprints.org/9929/1/organic_arable_systems_at_adas_terrington_of0112.pdf

Approaches to assess the environmental impact of organic farming with particular regard to Denmark
Provedor de dados: Organic Eprints
Autores: Hansen, Birgitte; Alrøe, Hugo Fjelsted; Kristensen, Erik Steen.
Ever increasing attention is being paid to the environmental impact of intensive agricultural practices, and in this context organic farming is gaining recognition as a relatively friendly production system. In general, the risk of harmful environmental effects is lower with organic than with conventional farming methods, though not necessarily so. This review examines organic farming in the light of European conditions, with special regard to recent research findings from Denmark. It specifies the environmental problems caused by modern farming practices and discusses appropriate indicators for assessing their impact.    A Driving Force-State-Response (DSR) framework is employed to organise and understand the processes and mechanisms that lie behind the...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Biodiversity and ecosystem services; Air and water emissions.
Ano: 2001
URL: http://orgprints.org/1025/1/Hansen_et_al_2001_Environmental_impact_of_organic_farming_postprint.pdf

The fate of nitrogen in outdoor pig production
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Petersen, SO; Sommer, SG.
There may be a conflict between animal welfare and nitrogen pollution in outdoor pig production. In response to concern about nitrogen being lost to the atmosphere and ground water we quantified spatial variation and temporal dynamics of mineral N, ammonia volatilization, denitrification and nitrate leaching from outdoor pig production at three commercial farms in Denmark. From paddocks containing farrowing sows substantial nitrogen losses were observed, particularly around the feeding areas. Gross ammonia emission rates varied between 0.08 and 1.26 kg N ha–1 d-1 and increased with animal density and N intake. The mean annual loss of ammonia per sow was 4.8 kg N. Denitrification rates averaged 0.52 kg N ha–1 d-1 in autumn following summer grazing with...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/229/1/MS_01.128_SP_05.doc

Changes in mineral content and CO2 release from organic greenhouse soils incubated under two different temperatures and moisture conditions
Provedor de dados: Organic Eprints
Autores: Pepin, Steeve; Dorais, Martine; Gruyer, Nicolas; Ménard, Claudine.
In organic greenhouse vegetable productions, the turnover rate of organic amendments may be a limiting factor for optimal crop productivity and quality. Hence, we determined the mineralization potential of several organic greenhouse soils maintained at two temperatures (17, 23C) and water potentials (–35, –250 mbars). Replicate cores of structurally intact soils were collected in plastic cylinders, saturated with water and adjusted to the appropriate matric potential. Additional soil samples were sieved, placed in glass jars and incubated under the same treatment conditions. Soil nutrients, gas concentration (O2, CO2, N2O) and microbial activity (CO2 release) were measured over a 25-week period during aerobic incubation. Large variations in nutrient and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology.
Ano: 2008
URL: http://orgprints.org/12713/1/Pepin_12713_ed.doc

Unterschiedlich aktive C-Pools im Boden: Corg, POS, CO2. 2. Vergleich der Parameter und Methoden zur Beurteilung der Bewirtschaftung
Provedor de dados: Organic Eprints
Autores: Raupp, Joachim; Oltmanns, Meike.
Description and assessment of soil organic matter are usually based on either stock parameters (e.g. Corg, carbon soluble in hot water, particulate organic matter fractions, humic acids, humins etc.) or activity parameters like soil respiration, microbial biomass (CFE, SIR), enzyme activities, Biolog® analysis, incubation tests. Each parameter describes a specific part of soil organic carbon and specific turnover processes in the complex action of carbon mobilization / immobilization. With 3 selected parameters: organic carbon content (Corg), particulate organic matter content (POM) and carbon dioxide development after re-wetting of air-dried soil samples (CO2 flush in 24 h) and their results obtained in a long-term fertilization trial the pros and cons of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology; Composting and manuring.
Ano: 2003
URL: http://orgprints.org/771/1/rowi03b.pdf

Udnyt græsmarkens kvælstof
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Det kræver god management at udnytte kvælstof i græsmarken. Det har generationer af forsøg på økologisk værkstedsareal vist. Siden 1997 har man langs en af indfaldsvejene til Forskningscenter Foulum – Burrehøjvej – kunnet se en stribe af de karakteristiske stålskabe, der anvendes til udvaskningsmålinger. Marken har været økologisk værkstedsareal med forsøg rettet imod forfrugtsværdi og udvaskning i græssædskifter. Men nu er det slut. Den sidste måling er lavet, og efter lang og tro tjeneste overgår marken nu til almindelig landbrugsdrift igen.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Dairy cattle; Air and water emissions.
Ano: 2007
URL: http://orgprints.org/11225/1/Klumme_JE_jan_07.doc

Effect of age and cutting frequency on below-ground biomass in grass-clover
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
Significant amounts of plant biomass and fixed N are incorporated into soil as roots, nodules and root exudates during the growth of grass-clover, which consequently is exposed to soil microbial degradation when the field is ploughed. This has major implications for our understanding of the potential contributions of legumes in the N economics and losses in grass-clover cropping systems.     We have studied the effects of grass-clover pasture age and cutting frequency (simulated grazing) on the development of the above ground as well as the below ground plant biomass, with emphasis on below-harvest contribution to the total N2 fixation.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Pasture and forage crops.
Ano: 2004
URL: http://orgprints.org/3368/1/3368.pdf

Vi trenger gode agronomer
Provedor de dados: Organic Eprints
Autores: Hansen, Sissel.
God agronomi er en forutsetning for å kunne lykkes med alt landbruk, men en gårdbruker, som ikke er bundet av det økologiske regelverket, kan kompensere noe for dårlig agronomi med ekstra tilskudd av innkjøpt kraftfôr, gjødsel og mer sprøyting mot ugras og skadegjørere. Ved dårlig agronomi blir tilført næring dårligere utnyttet, og det blir et stort næringsoverskudd på gården dersom det gjødsles sterkt. Et slikt næringsoverskudd er dårlig utnytting av verdens ressurser, samtidig som det øker faren for forurensing. For en økobonde vil dårlig agronomi resultere i dårlig avling på grunn av mangel på næring, problemer med ugras osv. Fordi det er mindre næring i jorda på en økologisk gård, er det imidlertid mindre fare for forurensing enn ved kombinasjonen...
Tipo: Newspaper or magazine article
Palavras-chave: Dairy cattle; Farming Systems; Nutrient turnover; Farm nutrient management.
Ano: 2016
URL: http://orgprints.org/31204/1/Kronikk%20til%20Nationen%2C%20Sissel%20Hansen%2031%20Juli%202016_utklipp%20fra%20avisa.pdf

Simulating soil fertility management effects on crop yield and soil nitrogen dynamics in field trials under organic farming in Europe
Provedor de dados: Organic Eprints
Autores: Doltra, J.; Gallejones, P.; Olesen, J.E.; Hansen, S.; Frøseth, R.B.; Krauss, M.; Stalenga, J.; Jończyk, K.; Martínez-Fernández, A.; Pacini, G.C.
Soil fertility building measures should be explored at the short and long-term for an adequate evaluation of their impact on sustaining yields and of its environmental consequences in crop rotations under organic farming. For such a purpose, process-based crop models are potential useful tools to complement and upscale field observations under a range of soil and climatic conditions. Organic rotations differ in soil fertility dynamics in comparison to conventional farming but very few modelling studies have explicitly considered this specific situation. Here, we evaluate the FASSET model to predict the effects of different fertility management options in organic crop rotations on dry matter (DM) and nitrogen (N) yield, and soil N dynamics, including N2O...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage.
Ano: 2019
URL: http://orgprints.org/34308/1/doltra-etal-2019_FCR_Vol233_p1-11.pdf

The comparison of nitrogen use and leaching in sole cropped versus intercropped pea and barley
Provedor de dados: Organic Eprints
Autores: Hauggaard-Nielsen, Henrik; Ambus, Per; Jensen, Erik Steen.
The effect of sole and intercropping of field pea (Pisum sativum L.) and spring barley (Hordeum vulgare L.) and of crop residue management on crop yield, NO3- leaching and N balance in the cropping system was tested in a 2-year lysimeter experiment on a temperate sandy loam soil. The crop rotation was pea and barley sole and intercrops followed by winter-rye and a fallow period. The Land Equivalent Ratio (LER), which is defined as the relative land area under sole crops that is required to produce the yields achieved in intercropping, were used to compare intercropping performance relative to sole cropping. Crops received no fertilizer in the experimental period. Natural 15N abundance techniques were used to determine pea N2 fixation.   The pea-barley...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions.
Ano: 2003
URL: http://orgprints.org/38/1/Haugaard_et_al_2003_Nitrogen_in_intercropped_pea_and_barley.pdf

High variability of symbiotic nitrogen fixation in farming conditions
Provedor de dados: Organic Eprints
Autores: Riesinger, Paul; Herzon, Irina.
Symbiotic nitrogen fixation (SNF) in perennial legume-grass leys is the primary source of N to organic farming systems in northern countries. This work aimed to quantify SNF in organically managed red clover (Trifolium pratense L.)-grass leys and to relate SNF to explanatory variables. The study was carried out on 27 farms located in the coastal regions of Finland and included 117 ley crops subjected to regular organic farming practices. SNF was calculated from clover herbage dry-matter yield with an empirical model. In the accumulated first and second cuts of one- and two-year-old red clover-grass leys, SNF averaged 185.4 kg N ha-1 yr-1 (SD ± 90.0 kg N ha-1 yr-1); fixation in the aftermath added 62.1 kg N ha-1 yr-1 (SD ± 49.8 kg N ha-1 yr-1). Due to the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Pasture and forage crops; Systems research and participatory research; Nutrient turnover; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/23522/1/23522%20Riesinger%20Herzon%20revised_MM.pdf

Yalova Koşullarında Organik Bursa Siyahı İncir Yetiştiriciliğinde Kullanılan Farklı Bitki Besleme Uygulamalarının Verim ve Kaliteye Etkisi
Provedor de dados: Organic Eprints
Autores: Soyergin, Serap; Yalçınkaya, Erol; Aktepe Tangu, Nesrin; Erenoğlu, Burhan; Uysal, Erdinç; Çelikel, Fisun Gürsel.
Bursa Siyahı İnciri, Marmara Bölgesinin standart sofralık incir çeşididir. Bursa Siyahı İncirinin yetiştirme tekniği ve kültürel istekleri bakımından kanaatkâr olması, ilaçlı mücadeleyi gerektirecek önemli hastalık ve zararlılarının olmaması organik yetiştiriciliğini mümkün kılmaktadır. Ayrıca iç ve dış pazarda talebinin olması ve pazarlama sorununun olmaması bu durumu desteklemektedir. Çalışma, bu potansiyeli değerlendirmek ve yetiştirme teknikleri ve özellikle farklı bitki besleme preparatlarının verim ve kalite üzerine olan etkilerini araştırmak amacıyla yapılmıştır. Deneme, Yalova Atatürk Bahçe Kültürleri Merkez Araştırma Enstitüsü verim çağındaki Bursa Siyahı İncir Kalibrasyon Parselinde kurulmuştur. Denemede Yeşil Gübre (bakla), Sığır Gübresi,...
Tipo: Book chapter
Palavras-chave: "Organics" in general; Nutrient turnover; Food systems.
Ano: 2010
URL: http://orgprints.org/20788/1/Yalova_Organik_%C4%B0ncir.pdf

An Innovative Approach towards Organic Management of Late Blight in Potato under Inhana Rational Farming Technology
Provedor de dados: Organic Eprints
Autores: Bera, R; Seal, A; Chowdhury, R. Roy; Datta, A; Saha, S; Sengupta, K.
Successful disease combat of crop can ensure healthy return for the farmers. However, limitation in the conventional disease management approach, especially in case of late blight of potato was the background for the present study that aimed at bringing forth an alternative pathway for effective disease management. Integrated farming under Inhana rational farming technology (IRF) was adopted as an alternate protocol. The approach works on the philosophy of the Trophobiosis theory that advocates pest/disease management through plant physiology management. The study was done in two major potato growing zones of West Bengal taking two major potato varieties i.e., Kufri Jyoti and Kufri Chandramukhi. Late blight incidence varied from 2.82 to 7.91% in the IRF...
Tipo: Journal paper
Palavras-chave: "Organics" in general; Soil quality; Farm economics; Nutrient turnover; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/32193/1/%2813-24%29%20potato%20disease.pdf

Rolle des Phosphors als Steuerungsgröße des Stickstoffertrages und der Phytodiversität ökologisch bewirtschafteter Dauergrünlandbestände
Provedor de dados: Organic Eprints
Autores: Mahnke, Barbara; Korpat, Daniel; Erlinghagen, Rebekka; Wrage-Mönnig, Nicole; Müller, Jürgen.
In einem konzeptionellen Projektansatz, der sowohl Felderhebungen, Feldversuche, Gefäßversuche und Laboranalysen umfasste, wurde der Frage der Bedeutung der Bodenphosphor-Trophie für die Präsenz, die Entwicklung und die Leistungsfähigkeit von Grünlandleguminosen im Ökologischen Landbau nachgegangen.  Ziel der Untersuchungen war es, die Bivalenz des Phosphors, der einerseits die Leguminosen und damit den N-Ertrag fördern kann und andererseits die Phytodiversität zu reduzieren vermag, näher zu ergründen. Es zeigte sich, dass die Präsenz von Grünlandleguminosen auf heterogenem Dauergrünland weder vom Gehalt an pflanzenverfügbarem P noch den einzelnen P-Fraktionen hinreichend erklärt werden konnte. Demnach spielen erratische bzw. weitere nicht kontrollierte...
Tipo: Report
Palavras-chave: Pasture and forage crops; Nutrient turnover; Biodiversity and ecosystem services.
Ano: 2017
URL: http://orgprints.org/32078/1/32078-12OE008-uni-rostock-mueller-2017-steuerungsgroesse-phosphor.pdf

Vergleich von Methoden zur Ermittlung der mikrobiellen Diversität in Böden des DOK-Versuches
Provedor de dados: Organic Eprints
Autores: Rasche, Frank; Widmer, Franco; Mäder, Paul; Gattinger, Andreas; Fliessbach, Andreas.
Problemstellung/Ziele: Die Zusammensetzung mikrobieller Gemeinschaften und deren Funktionen im Boden kann mit Hilfe moderner Techniken beschrieben werden. Diese beruhen u.a. auf der Untersuchung der genetischen Eigenschaften mittels DNA-Analysen, molekularen Markern der Zellmembran oder physiologischer Eigenschaften der Organismen. Die Frage, ob die daraus ableitbare strukturelle und funktionelle Vielfalt von mikrobiellen Gemeinschaften ein Kriterium für Bodenqualität sein kann, ist Gegenstand wissenschaftlicher Diskussion. Der Nachweis eines Zusammenhangs von mikrobieller Diversität und wichtigen ökologischen Funktionen des Bodens, die auf mikrobiellen Prozessen basieren, steht noch aus. Das Ziel der vorliegenden Untersuchung war, drei Ansätze zur...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover; Soil quality; Biodiversity and ecosystem services; Soil biology.
Ano: 2003
URL: http://orgprints.org/2793/1/Rasche_Poster_WOEL2003.pdf

Kompetenz- und Praxisforschungsnetzwerk zur Weiterentwicklung des Nährstoffmanagements im ökologischen Landbau (Verbundvorhaben)
Provedor de dados: Organic Eprints
Das hier beschriebene Verbundvorhaben umfasst folgende Teilprojekte: FKZ 18OE014, FKZ 18OE067, FKZ 18OE068, FKZ 18OE069, FKZ 18OE070, FKZ 18OE071, FKZ 18OE072,  FKZ 18OE073, FKZ 18OE074, FKZ 18OE075.  Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/id/saved_search/1730.  Im Hinblick auf das Nährstoffmanagement bietet sich im Ökolandbau ein vielfältiges Bild: im langjährigen Öko-Ackerbau geraten alle Hauptnährstoffe zunehmend ins Minimum, im Öko-Gemüsebau hingegen treten Imbalance und P-Überversorgung auf. Hinsichtlich Bodenanalysen und deren Interpretation herrscht in der Praxis große Unsicherheit. Die Wissenschaft versteht die Probleme zum...
Tipo: Project description
Palavras-chave: Crop combinations and interactions; Systems research and participatory research; Composting and manuring; Nutrient turnover; Soil tillage; Germany.
Ano: 2023

Improving the efficiency of rock phosphate on high pH soils: Results from participatory research in India
Provedor de dados: Organic Eprints
Autores: Andres, Christian; Mandloi, Lokendra S.; Verma, Rajeev; Gomez, Sara; Nyffenegger, Mirjam R.; Locher, Michael; Patel, Dharmendra; Forster, Dionys; Bhullar, Gurbir S.; Studer, Christoph.
High soil pH levels may limit the availability of phosphorous (P) to crops. In organic farming, the use of synthetic P fertilizers is not allowed. Application of rock phosphate (RP) to crops is one of the alternatives for organic production. However, RP application shows little effect on high pH soils, because the P is not transformed into plant-available forms under alkaline soil conditions.  Aiming at the development of locally adapted solutions, we followed a Participatory Technology Development approach, making use of the local knowledge to identify current practices and associated problems by conducting focus group discussions with organic farmers. Farmers stated that they are facing challenges with a P limitation in their cotton-based production...
Tipo: Conference paper, poster, etc.
Palavras-chave: Systems research and participatory research; Nutrient turnover; Technology transfer.
Ano: 2014
URL: http://orgprints.org/27525/1/Abstract_RP-FYM_HAFLSymp_final.pdf

N-Mineralisation beim Brutversuch korrelierte eng mit dem C/N-Verhältnis
Provedor de dados: Organic Eprints
Autores: Laber, Hermann.
Am Sächsischen Landesamt für Umwelt, Landwirtschaft und Geologie (LfULG) in Dresden-Pillnitz wurde im Winter 2013/2014 ein Brutversuch mit zwei Handelsdüngern tierischer Herkunft, zwei gemüsebaulichen Ernterückständen sowie zwei Gründüngungspflanzen durchgeführt. Die Bebrütung mit Oberbodenmaterial eines Lehmbodens wurde bei 15°C über 14 Wochen durchgeführt.  Die N-Mineralisation der Düngemittel mit relativ engem C/N-Verhältnis verlief bis zum 25. Tag nahezu linear, flachte dann aber mehr oder weniger schnell ab. Insgesamt konnten die Mineralisationsverläufe sehr gut mit ‘monomolekularen Funktionen‘ beschrieben werden. Phacelia Material mit einem weiten C/N-Verhältnis von 27 führte zu einer N-Immobilisation. Ein Dünger auf Schafwollbasis sowie...
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/27731/1/laber-2014-LfULG-brutversuch.pdf

Three new systems for recycling of urban organic waste to agriculture
Provedor de dados: Organic Eprints
Autores: Møller, J.; Bruun, S.; Magid, J.
Short-Circuit is an on-going EU-LIFE ENVIRONMENT funded project (KVL is project leader) with the aim of 'short-circuiting' the carbon and nutrient cycle between urban and rural districts by establishing three new systems for source separation, collection and composting of organic waste in the greater Copenhagen area.    The project is a collaboration between research institutions (KVL and Küngl. Tekniska Högskolan in Stockholm), and industry represented by the composting firm Solum Ltd. and the Internet-based box scheme business Aarstiderne Ltd.    KVL´s part of the activity is co-funded by the Danish Research Centre for Organic Farming, via the CRUCIAL project.    These two projects form part of a coherent effort to re-invent urban waste management with...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/5857/1/5857.PDF

Effects of green manure storage and incorporation methods on nitrogen release and N2O emissions after soil application
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Sørensen, Peter; Petersen, Søren O.; Ma, Xiuzhi; Ambus, Per.
More efficient use of green manure-derived nitrogen (N) may improve crop yields and reduce environmental impacts in stockless organic arable farming. In this 3-month incubation study, we tested a new strategy where green manure leys are harvested and preserved until the following spring either as compost mixed with straw (grass-clover:straw, 4:1, w:w) or as silage of harvested ley biomass. Grass-clover compost or silage was soil-incorporated by either simulated ploughing (green manure placed at 15 cm depth) or harrowing (green manure mixed into the upper 5-cm soil horizon) in order to assess treatment effects on net release of plant-available N, nitrous oxide (N2O) fluxes, and soil respiration. Grass-clover silage provided the highest net N release with...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2013
URL: http://orgprints.org/24960/7/24960.pdf

Root biomass in cereals, catch crops and weeds can be reliably estimated without considering aboveground biomass
Provedor de dados: Organic Eprints
Autores: Hu, Teng; Sørensen, Peter; Wahlström, E.M.; Chirinda, Ngonidzashe; Sharif, Behzad; Li, Xiaoxi; Olesen, Jørgen E.
Reliable information on belowground plant biomass is essential to estimate belowground carbon inputs to soils. Estimations of belowground plant biomass are often based on a fixed allometric relationship of plant biomass between aboveground and belowground parts. However, environmental and management factors may affect this allometric relationship making such estimates uncertain and biased. Therefore, we aimed to explore how root biomass for typical cereal crops, catch crops and weeds could most reliably be estimated. Published and unpublished data on aboveground and root biomass (corrected to 0–25 cm depth) of cereal crops (wheat and barley), catch crops and weeds were collected from studies in Denmark. Leave one out cross validation was used to determine...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/32991/1/Paper%20Published%20Root%20Estimation.pdf

Effects of organic matter input on soil microbial properties and crop yields in conventional and organic cropping systems
Provedor de dados: Organic Eprints
Autores: Chirinda, Mr Ngonidzashe; Olesen, Professor Jørgen, E.
Unlike conventional cropping systems, which are characterised by targeted short-term fertility management, organic farming systems depend on long-term increase in soil fertility and promotion of soil biodiversity. This study sought to investigate long-term effects of organic matter inputs on various cropping systems in a 10-year-old experiment. Results show that in the long-term high C and N inputs enhance microbial activity. Microbial biomass N and the potential nitrification rate were higher in cropping systems based on green manure than in those reliant on inputs from animal manure and mineral fertilizer. Soil microbiological properties were affected by the individual crops in the rotation. The high microbial activity with increased organic matter...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality.
Ano: 2008
URL: http://orgprints.org/11700/1/Chirinda__11700_ed.doc

Decomposition study using tea bags
Provedor de dados: Organic Eprints
Autores: Tresch, Simon; Fliessbach, Andreas.
Comparing the decomposition of green tea as a fast -decomposing material with rooibos as a material, which is difficult to break down, allows for the calculation of the tea bag index. This provides information on the capability of the soil as a living organism to transform organic residues back into plant-available nutrients and make some contribution to the build-up of soil humus. This technique is easy to apply. Place the tea bag in the soil and take it out after three months to see how much is left. It is fascinating to discover the result of our hard working little helpers in the soil and how this work is giving nutrients to a new generation of plants.    Spanish version available at http://orgprints.org/32465/
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2016
URL: http://orgprints.org/30717/1/fertilcrop-tn-wp4-teabag_english.pdf

Soil carbon storage and yields of spring barley following grass leys of different age
Provedor de dados: Organic Eprints
Autores: Christensen, B.T.; Rasmussen, J.; Eriksen, J.; Hansen, E.M.
The inclusion of leys in arable cropping is generally found to improve soil fertility. The effect of leys depends on their botanical composition and management, but the significance of individual management factors remains confounded in most studies. We quantified the effects of one- to six-year-old pure grass leys on soil C (0-20 cm) and yields of three subsequent test crops of spring barley (Hordeum vulgare) under-sown with Italian ryegrass (Lolium perenne). Each ley was a mixture of four grass species (Lolium perenne, Festuca pratensis, Phleum pratense, Poa pratensis), exposed to three to four cuts annually. Only mineral fertilizers were applied (225 kg N ha-1 yr-1). The yield of barley was tested at six rates of N fertilizer (0 to 150 kg N ha-1). The...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16289/1/16289.pdf

DOK-Versuch
Provedor de dados: Organic Eprints
Autores: Morgner, Marion; Fliessbach, Andreas; Mäder, Paul.
DOK – Was ist das?  Der Bio-Landbau findet jetzt auch in der Wissenschaft Gehör. Ein Langzeitversuch, der den konventionellen mit dem biologischen Anbau vergleicht, beweist: Bio-Landbau ist schonender, effizienter und nachhaltig.    DOK – Spezialisten im Gespräch  Mit der Veröffentlichung im Wissenschaftsmagazin Science hat die Forschung im DOK-Versuch nach 24jähriger Laufzeit einen vorläufigen Höhepunkt erreicht. Die beiden Versuchsleiter und zwei Landwirte ziehen eine Zwischenbilanz.    Bio-Erträge können sich sehen lassen  Der DOK-Versuch beweist die hohe Effizienz der biologischen Pflanzenproduktion: Bei 50 Prozent weniger Aufwand an Düngern und Energie und 97 Prozent weniger Einsatz von Pflanzenschutzmitteln lagen die Erträge im Vergleich zum...
Tipo: Web product
Palavras-chave: Nutrient turnover; Soil biology; Biodiversity and ecosystem services; Soil quality.
Ano: 2003
URL: http://orgprints.org/2921/1/morgner%2Det%2Dal%2D2004%2Ddok%2Dwas%2Dist%2Ddas.pdf

The Danish organic crop rotation experiment for cereal production 1997-2004
Provedor de dados: Organic Eprints
Autores: Rasmussen, Ilse A.; Askegaard, Margrethe; Olesen, Jørgen E.
In 1997 a crop rotation experiment was initiated at three sites in Denmark. The objective of the experiment was to explore the possibilities for both short-term and long-term increases in organic cereal production through manipulation of crop rotation design on different soil types. The experiment included three factors (proportion of grass-clover in the rotation, catch crops and manure application) in a randomised factorial design. The main indicators measured in the experiment were crop yield, nutrient leaching and weeds.    The crop rotation experiment has shown significant effects of location, crop rotation, catch crops and manure on yields, weed infestation, soil fertility and nutrient losses (Olesen et al., 2002; Schjønning et al., 2004; Askegaard et...
Tipo: Book chapter
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Weed management; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/10000/1/10000.pdf

Unpublished leaflet distributed at field visit 30 Oct 2017_SoilVeg_AU-FOOD
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne Lakkenborg.
Presentation distributed at field visit 30. Oct. 2017 about SoilVeg
Tipo: Other
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage; Vegetables.
Ano: 2017
URL: http://orgprints.org/33589/1/Unpublished%20leaflet%20distributed%20at%20field%20visit%2030%20Oct%202017_SoilVeg_AU-FOOD.pdf

Forskerbonden i Skien
Provedor de dados: Organic Eprints
Autores: Serikstad, Grete Lene.
Hvordan kan flest mulig utnytte mest mulig av storfegjødsla på en best mulig måte – med minst mulig tap av næring? Dette har mjølkeprodusent Knut Vasdal arbeidet med i mange år. I vinter kom gjennombruddet.
Tipo: Web product
Palavras-chave: Composting and manuring; Nutrient turnover; Air and water emissions; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/33520/1/forskerbonden-i-skien

Soil properties, crop production and greenhouse gas emissions from organic and inorganic fertilizer-based arable cropping systems
Provedor de dados: Organic Eprints
Autores: Chirinda, N.; Olesen, J.E.; Porter, J.R.; Schjønning, P.
Organic and conventional farming practices differ in the use of several management strategies, including use of catch crops, green manure, and fertilization, which may influence soil properties, greenhouse gas emissions and productivity of agroecosystems. An 11-yr old field experiment on a sandy loam soil in Denmark was used to compare several crop rotations with respect to a range of physical, chemical and biological characteristics related to carbon (C) and nitrogen (N) flows. Four organic rotations and an inorganic fertilizer-based system were selected to evaluate effects of fertilizer type, catch crops, of grass-clover used as green manure, and of animal manure application. Soil was sampled from winter wheat and spring barley plots in Sept 2007, April...
Tipo: Journal paper
Palavras-chave: Soil biology; Nutrient turnover; Air and water emissions.
Ano: 2010
URL: http://orgprints.org/18511/1/18511.pdf

Projekt om økonomisk og miljøvenligt kløvergræs på store økologiske kvægbrug
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Det er i stigende grad store bedrifter med mange køer, som præger billedet i økologisk mælkeproduktion. Konsekvensen er, at afstandene bliver for store til afgræsning af markerne langt fra stalden. Derfor er der meget græs i sædskiftet tæt på stalden og det bliver intensivt afgræsset. Den udvikling har konsekvenser: Langvarige græsmarker er ofte mindre produktive og af dårligere kvalitet, det er sværere at udnytte kvælstof opsamlet i græsmarken og der kan være problemer med etablering af kløvergræs efter omlægning.   Et nyt forskningsprojekt, som skal belyse disse problemstillinger, er netop startet ved Det Jordbrugsvidenskabelige Fakultet. I et markforsøg i Foulum undersøges strategier for sammensætning af sædskifter og management i græsmarker. Helt...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Dairy cattle; Air and water emissions.
Ano: 2007
URL: http://orgprints.org/11226/1/OrgGrass_landbrugsavisen.doc

SmartSOIL Tool
Provedor de dados: Organic Eprints
Autores: Taghizadeh-Toosi, Arezoo.
The purpose of the tool is to give guidance in the management of arable crops in order to maintain and increase soil C and consequently reduce climate change effects. It proposes changes in the crop rotation, the use of catch and cover crops, use of manure and other organic fertilizers and simulates the impact on yield. It is tuned for different areas and soil types.     The SmartSoilTool is a DSS in 7 languages where the user can choose location, soil type, farming system etc. and the system simulates the effects on yield, profitability, soil C etc. It is useful for farmers and advisers, both newcomers and skilled and it is not specific for organic.     It has specific soil and management infos for Denmark, Italy, Hungary, Spain and Poland.    Other...
Tipo: Practice tool
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil.
Ano: 2015
URL: http://orgprints.org/31101/1/31101.png

Possibilities for closing the urban rural nutrient cycles
Provedor de dados: Organic Eprints
Autores: Refsgaard, Karen; Jenssen, Petter D.; Magid, Jakob.
This Chapter discuss the potential of organic farming for contributing to sustainable development, mainly in lw-income countries, by integrating urban settlements with rual communities, through the recycling of domestic and household waste.
Tipo: Book chapter
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2006
URL: http://orgprints.org/9215/1/9215.pdf

Naar een betere benutting van bodemfosfor: Onderzoek in 2012-2013
Provedor de dados: Organic Eprints
Autores: Wijk, Kees; Rietberg, P.I.; Timmermans, B.G.H.
Vanwege de eindigheid van de wereldvoorraad makkelijk winbaar fossiel fosfor (P) en om fosforemissies uit (overbemeste) landbouwgronden naar grond- en oppervlaktewater te verminderen, is het Nederlandse landbouwbeleid gericht op het verlagen van fosforbemesting. Het wordt steeds belangrijker om het fosfor dat in de bodem aanwezig is, te benutten. Dit project heeft als doel te onderzoeken hoe dit kan en hoe dit gekwantificeerd kan worden. Er wordt ingegaan op de invloed van bemesting op de bodemfosfortoestand en de mogelijke rol van organisch fosfor in de fosforvoorziening van het gewas. Daarnaast wordt gekeken naar biologische bedrijven die telen met lage aanvoer van fosfor en lage bodemfosforstatus. Deze rapportage betreft de projectjaren 2012 en 2013.
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Soil; Environmental aspects.
Ano: 2015
URL: http://orgprints.org/29471/1/2983.pdf

Anaerobically digested green manure is a valuable fertilizer
Provedor de dados: Organic Eprints
Autores: De Notaris, C.; Sørensen, P.; Møller, H.B.; Wahid, R.; Eriksen, J.
Anaerobic digestion of green manure increases nitrogen (N)availability. However, the N fertilizer replacement value is affected by the initial quality of the green manure, which is related to plant species composition and cutting frequency.
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/34982/1/Anaerobically%20digested%20green%20manure%20is%20a%20valuable%20fertilizer_34982.pdf

Upward N redistribution - Postharvest effect of cover crops on creeping thistle (Cirsium arvense)
Provedor de dados: Organic Eprints
Autores: Phan, Hong TT; Thorup-Kristensen, Kristian.
The study aimed to uncover the mechanism of how cover crops versus autumn tillage influences the competition of succeeding barley crop and thistle. By the difference in their effects on the N distribution, this gave barley or thistle an advantage to uptake more soil N than the other during the growing season of barley.
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Soil quality; Nutrient turnover; Research methodology and philosophy; Environmental aspects; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/35206/1/Conference%20Abstract.pdf

Stickstoffmanagement im Ökologischen Gemüsebau
Provedor de dados: Organic Eprints
Autores: Elers, Barbara.
Eines der Probleme des Ökologischen Gemüsebaus ist die adäquate Versorgung der Kulturen mit Stickstoff. Bei dem Umgang mit der Stickstoffdüngung kann man mehrere Problemfelder unterscheiden:  - eine ausreichende N-Versorgung bei anspruchsvollen Kulturen  - die sachgerechte Kalkulation der N-Düngung in Abhängigkeit vom Bedarf der Pflanze  - mögliche N-min Rest am Ende der Kultur im Boden  Bei der Evaluierung der Kalkulation zeigte sich, daß die Beziehung zwischen dem Ertrag und dem kalkulierten N-Angebot bei Kohl und Spinat eng war. Es zeigte sich außerdem, daß die Nachlieferung aus der Gründüngung in der Regel überschätzt worden war, während die aus dem Humus in der Regel unterschätzt worden war. Außerdem zeigte sich, dass es erforderlich ist, weitere...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover; Vegetables.
Ano: 2003
URL: http://orgprints.org/2203/1/2203%2Delers%2D2003%2DStickstoffmanagement.pdf

Mineralstickstoffgehalt im Boden in einem ökologischen und einem konventionellen Pflanzenproduktionssystem
Provedor de dados: Organic Eprints
Autores: Jonczyk, Krzysztof; Igras, Janusz.
An ecological five-year rotation of potato - spring barley with undersown grass clover – grass clover – grass clover – winter wheat with cover crop and a conventional three-year rotation of winter rape – winter wheat – spring barley systems were compared for soil mineral nitrogen content in 0-90cm from 2000-2003. The research was conducted on a field trial located at the Experimental Station in Osiny (Lublin province, Poland) on grey brown podzolic soil. In the ecological rotation, mineral nitrogen contents increased over time while in the conventional system the contents were the same after three years. However, depending on the crop and year there were large losses. The largest potential for Nmin losses was observed after grass clover in the ecological,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2005
URL: http://orgprints.org/3821/1/3821.pdf

Forbs differentially affect soil microbial community composition and functions in unfertilized ryegrass-red clover leys
Provedor de dados: Organic Eprints
Autores: Cong, WF; Eriksen, J.
Increasing plant diversity in agroecosystems is proposed to enhance multiple ecosystem services. Adding selected forbs such as caraway (Carum carvi L.) and plantain (Plantago lanceolata L.) to productive grass-clover mixtures can further enhance forage yields, root biomass, uptake of mineral nutrients and improve animal performance. Yet, it remains unclear whether and how adding these forbs to grass-clover mixtures can influence soil microbial communities and associated soil carbon (C) and nitrogen (N) cycling. Based on a three-year grassland experiment varying in species diversity and composition with and without fertilizer application, we determined soil microbial community composition and functions related to C and N cycling under laboratory...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/32975/1/Cong%20and%20Eriksen%202018.pdf

Ompløjning af græsmarker kan give stor udvaskning
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/231/1/%C3%98kologisk_Jordbrug.doc

Hvor meget kvælstof henter kløvergræs fra luften?
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
Bælgplanter, herunder de forskellige kløverarter, kan ved knoldbakteriers hjælp (symbiose) optage luftens kvælstof (N2), og derved udnytte denne uudtømmelige kvælstofkilde. Processen er simpelt-hen forudsætningen for at kunne drive økologisk jordbrug, og det har derfor stor interesse at kende størrelsen af N-fikseringen og have kendskab til hvilke faktorer der har betydning for derved om muligt at kunne optimere produktiviteten og reducere eventuelle miljømæssige effekter af et givet dyrkningssystem.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Pasture and forage crops.
Ano: 2003
URL: http://orgprints.org/4162/1/4162.pdf

Sources of nitrogen for winter wheat in organic cropping systems
Provedor de dados: Organic Eprints
Autores: Petersen, Søren O.; Schjønning, P.; Olesen, Jørgen E.; Christensen, S.; Christensen, B.T.
In organic cropping systems, legumes, cover crops, residue incorporation, and manure application are used to maintain soil fertility, but the contributions of these management practices to soil nitrogen (N) supply remain obscure. We examined potential sources of N for winter wheat (Triticum aestivum L.) in four experimental cropping systems established in 1997 on three soil types. Three of the four systems were under organic management. Topsoil N, depth of the A horizon, and cumulated inputs of N since 1997 were determined at plot level. Labile soil N pools (mineral N, potentially mineralizable N [PMN], microbial biomass N [MBN]) were monitored during two growth periods; at one site, biomass C/N ratios were also determined. Soil for labile N analysis was...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Soil biology; Nutrient turnover; Farm nutrient management.
Ano: 2013
URL: http://orgprints.org/22015/7/22015.pdf

Effects of reduced soil functionality in European vineyards
Provedor de dados: Organic Eprints
Autores: Costantini, E.A.C.; Priori, S.; Akca, S.; Castaldini, M.; D'Avino, L.; Fulchin, E.; Gagnarli, E.; Giffard, B.; Kìraz, M.E.; Lagomarsino, A.; Landi, S.; Martensson, A.; Pellegrini, S.; Perria, R.; Puccioni, S.; Schroers, H.J.; Simoni, S.; Storchi, P.; Tangolar, S.; Tardaguila, J.; Valboa, G.; Zombardo, A.
Improper or excessive land preparation methods in vineyards before planting can have a considerable impact on  soil functionality. They include excessive levelling and deep ploughing leading to disturbances of the natural contour  of slopes and destruction, truncation and burial of soil horizons. Manipulations may significantly modify  chemical, physical, biological and hydrological balance of soils. Problems that may arise from these interventions  relate to the reduction of organic substances, enrichment of calcium carbonate and soluble salts, impacting development  and health of grapevines. Reduced water retention capacity can lead to increased water stress during  dry season, decreased water permeability and circulation of oxygen in the soil, increased...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Soil; Biodiversity and ecosystem services.
Ano: 2017
URL: http://orgprints.org/32423/1/EGU2017-2296.pdf

Nitrogen management on large organic dairy farms
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Askegaard, M.; Søegaard, K.
Large dairy herds need much grassland near the farm. Utilisation and losses of nitrogen in such grass-intensive crop rotations can be controlled by management: In grassland, grazing days or fertiliser input can be reduced, and following grassland cultivation, a barley whole crop for silage undersown with Italian ryegrass can reduce leaching to a minimum.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16293/1/16293.pdf

Können Pflanzenkomposte Rindermist ersetzen?
Provedor de dados: Organic Eprints
Autores: Oltmanns, Meike.
Bei einem Versuch zeigte sich, dass Grünschnittkompost mit Düngewasser behandelt dem Stallmist in der Formgestaltung näher kommt als reiner Grünschnittkompost. Die Wirkung auf die Wurzelmorphologie konnte im Kristallisationsbild sichtbar gemacht werden
Tipo: Newspaper or magazine article
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/30383/1/Forschung_2014-6.pdf

Regenwürmer – Baumeister der Bodenfruchtbarkeit
Provedor de dados: Organic Eprints
Autores: Pfiffner, Lukas; Tresch, Simon.
Je mehr Regenwürmer vorhanden sind, desto besser ist die Bodenfruchtbarkeit. In intensiv bewirtschafteten Böden können sie hingegen fast vollständig verschwinden.
Tipo: Newspaper or magazine article
Palavras-chave: Soil biology; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32195/1/Bioaktuell_8_2017_L.Pfiffner_S.Tresch.pdf

Kløver i gyllen
Provedor de dados: Organic Eprints
Autores: Hansen, Jesper.
En begrænsende faktor for højere udbytter hos mange økologiske planteavlere er mangel på næringsstoffer – primært kvælstof. Forsyning med kvælstof kan selvfølgelig ske vha. efterafgrøder, helårs grøngødning og bælgsæd, samt fortsat mulighed for at anvende konventionel husdyrgødning.
Tipo: Report chapter
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/27270/6/27270.pdf

Capire meglio i sistemi agricoli con test a lungo termine
Provedor de dados: Organic Eprints
Autores: Fliessbach, Andreas.
Dal 6 all’11 ottobre, su invito di FiBL, Agroscope e il politecnico di Zurigo si sono riuniti al Monte Verità di Ascona 87 ricercatori provenienti da 20 paesi. L’evento è stato organizzato in occasione dei 40 anni di esistenza dell’esperimento a lungo termine DOK che mette a confronto sistemi di coltivazione biodinamici, biologici e convenzionali.
Tipo: Newspaper or magazine article
Palavras-chave: Soil quality; Systems research and participatory research; Nutrient turnover.
Ano: 2019
URL: http://orgprints.org/36691/1/bioattualita_9_2019_fliessbach.pdf

Ökologische Beurteilung und Optimierung von Hofdüngereinsatz und Stickstoffdüngung
Provedor de dados: Organic Eprints
Die Stickstoffverluste aus der schweizerischen Landwirtschaft sind trotz der abnehmenden Tendenz in den letzten Jahren noch immer zu hoch. Die mengenmässig bedeutsamsten Verluste sind Ammoniakemissionen und Nitratauswaschung. Handlungsbedarf besteht insbesondere bei den Ammoniakverlusten, die weniger stark abgenommen haben als die Nitratauswaschung.  Zur Verringerung der Ammoniakverluste beim Hofdüngereinsatz müssen die Emissionen quantifiziert, die Einflussfaktoren mit ihren Wechselwirkungen identifiziert und Reduktionsmassnahmen abgeleitet und bewertet werden. Im Bereich des Feldbaus besteht Handlungsbedarf in der Abklärung des Einflusses von Bodenbearbeitung, Stickstoffdüngung und Anbausystemen (IP, BIO) und ihrer Wechselwirkungen auf die...
Tipo: Project description
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2023
URL: http://orgprints.org/5095/1/Richner%2D2005%2DHofduengerwirtschaft.pdf

DoubleCrop: Gødningseffekt af blå biomasse
Provedor de dados: Organic Eprints
Autores: Sørensen, Jørn Nygaard.
Præsentation af resultater fra brugen af grøn og blå biomasse som plantebaserede gødninger i DoubleCrop projektet
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Vegetables; Root crops.
Ano: 2019
URL: http://orgprints.org/35462/1/G%C3%B8dningseffekt%20af%20bl%C3%A5%20biomasse%20J%C3%B8rn%20Nygaard%20S%C3%B8rensen%2005mar2019%20PP.pptx

Impact environnemental ( sur l’air et l’eau) des systèmes d’élevage de ruminants en agriculture biologique –   Evaluation des émissions de N -(NH3, N2O, NO3 ) , CH4, ,  CO2-énergie directe et indirecte
Provedor de dados: Organic Eprints
Il s’agit d’évaluer l’impact environnemental (sur air et eau) des systèmes d’élevage de ruminants en agriculture biologique ( NH3, N2O, NO3 , CH4, CO2,). Le projet s’articule autour de deux approches, l’une très précise dans deux stations expérimentales biologiques, l’autre en fermes d’éleveurs biologiques ou de lycée agricole au système proche des systèmes d’élevage étudiés en station et que nous appelleront « fermes satellites ». Les calculs en stations expérimentales seront réalisés à partir de données journalières concernant l’alimentation des animaux, les productions, l’utilisation des parcelles par les animaux et toutes les pratiques de fertilisation et de récolte. Tous les flux internes et externes de matières seront l’objet de pesées et d’analyses....
Tipo: Project description
Palavras-chave: Nutrient turnover; Pasture and forage crops; Indicators and other value-laden measures; Dairy cattle; Sheep and goats; Air and water emissions; Composting and manuring; Beef cattle.
Ano: 2023

Nährstoffsalden und Nitratgehalte des Sickerwassers in ökologisch und konventionell bewirtschafteter Ackerflächen
Provedor de dados: Organic Eprints
Autores: Hege, U.; Fischer, A.; Offenberger, K.
Die Nährstoffsalden ökologisch bewirtschafteter Betriebe lagen bei den Hauptnährstoffen Stickstoff, Phosphat und Kali deutlich unter den Salden konventionell bewirtschafteter Betriebe. Bei Phosphat und Kali wurden negative Salden festgestellt. Bei mittel- und langfristiger Betrachtung werden die pflanzenverfügbaren Bodengehalte sinken. Unter 10 mg/100 g Boden muss im Rahmen der zugelassenen Möglichkeiten eine Erhaltungsdüngung durchgeführt werden, wenn das mögliche Ertragspotential ausgeschöpft werden soll. Die dargestellten Unterschiede der Stickstoffsalden bei konventioneller und ökologischer Bewirtschaftung werden durch Untersuchungsergebnisse hinsichtlich der Nitratkonzentration im Sickerwasser bestätigt. Nach unseren Untersuchungen lag die...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover; Air and water emissions.
Ano: 2003
URL: http://orgprints.org/1316/1/1316%2Dhege%2Du%2Det%2Dal%2D2003%2Dsickerwasser.pdf

Evaluation of an Organic Package of Practice Towards Green Gram Cultivation and Assessment of its Effectiveness in Terms of Crop Sustainability and Soil Quality Development
Provedor de dados: Organic Eprints
Autores: Seal, A; Bera, R; Roy Chowdhury, R; Mukhopadhyay, K; Mukherjee, S; Dolui, Ajit Kumar.
Restoration of soil has been identified as the option; to ensure crop sustainability. However, as per Trophobiosis Theory of French Scientist F. Chaboussou, focus on development of healthy plants is necessary to abate pest and disease invasion so as to ensure sustained crop performance, even under unfavorable environmental conditions. The present study, in randomized block design with green gram as test crop; was undertaken in Krishi Vigyan Kendra (Howrah, West Bengal) to evaluate the effectiveness of Inhana Rational Farming (IRF) Technology towards crop yield and soil quality development under different sustainable models viz. organic cultivation, integrated soil with organic crop management and non- chemical crop management; as compared to conventional...
Tipo: Journal paper
Palavras-chave: "Organics" in general; Nutrient turnover; Research communication and quality; Biodiversity and ecosystem services; Farm nutrient management; Knowledge management.
Ano: 2017
URL: http://orgprints.org/32201/1/Green%20gram-%20Turkish%20journal.pdf

Entwicklung und Niveau des Bodenreaktionszustandes und der Grundnährstoffversorgung auf dem Ackerland von ökologisch wirtschaftenden Betrieben in Mecklenburg-Vorpommern
Provedor de dados: Organic Eprints
Autores: Kape, Hans-Eberhard; Pöplau, Ralf; Nawotke, Christian.
Um Aussagen über die Entwicklung und das Niveau des Bodenreaktionszustandes und der Grundnährstoffversorgung des ökologischen Landbaus zu gewinnen, wurden die in der LUFA Rostock untersuchten Bodenproben von ökologisch wirtschaftenden Betrieben aus den Jahren 2006 bis 2013 übernommen, zu Zeitreihen zusammengestellt und ausgewertet. Gleichzeitig erfolgte ein Vergleich mit den Bodenproben aus dem konventionellen Landbau.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/29707/1/Grundn%C3%A4hrstoffe_Kape.pdf

Changes in the nutrient content of agricultural soil on conversion to organic farming, in relation to farm level nutrient balances and soil contents of clay and organic matter.
Provedor de dados: Organic Eprints
Autores: Løes, Anne-Kristin; Øgaard, Anne Falk.
Agricultural soil on 12 farms converting to organic farming was sampled in 1989 and 1995 at the same sample points. Concentrations of plant-available (-AL) P, K, Ca and Mg, HNO3-soluble K, tot- N, tot-C and pH were measured in two layers. The average K-AL concentration and pH were reduced in both layers. The average P-AL concentration was reduced in the topsoil. K-AL and P-AL increased in samples with low concentrations and decreased in samples with high and very high concentrations in 1989. The total N concentration increased in the subsoil. Tot-N and tot-C increased in top- and subsoil with a low organic matter content. The net import of P, calculated by farm level nutrient balances, was negatively correlated to the change in kg P-AL per hectare in the...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 1997
URL: http://orgprints.org/5945/1/Acta_1997%2C_Changes_in_the_nutrient_content...pdf

Soil sulphur status following long-term annual application of animal manure and mineral fertilizers.
Provedor de dados: Organic Eprints
Autores: Eriksen, Jørgen; Mortensen, Jørgen.
In agricultural systems with low S inputs, crops rely on the release of S from organic forms in the soil. In the Askov long-term experiments, started in 1894 on both sandy and loamy soils, was investigated the soil S status following long-term application of animal manure and mineral fertilizers in the growing season of 1995.  In a field trial with oil-seed rape (Brassica napus, L.) soil analysis, leaf tissue analysis, yield and S-removal in plant material was used to characterize differences in availability of soil S. One half of all plots had 63 kg S/ha as gypsum applied. Fertilization with animal manure or NPK fertilizer increased the content of soil organic C compared with unfertilized plots. This increase was followed by a similar  build-up of organic...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 1999
URL: http://orgprints.org/141/1/TEKST.doc

Kalkulation der N2-Fixierleistung und der N-Flächenbilanz beim Anbau von Leguminosen im ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Jost, Britta; Schmidtke, Knut; Rauber, Rolf.
During last years procedures were developed to calculate the N2 fixation and the N balance of grain and forage legumes under organic farming conditions. These proce-dures are distinctly improved by including the mineral soil nitrogen the legumes can use during the growing season. A system monitoring the plant available soil N was established in 2005 and 2006, which was distributed across Germany. Available soil N was assessed by means of non leguminous reference plants. Results from 2005 are recorded. It is the objective to make the calculation of the N balance of legumes inter-actively available in the near future via the internet portal ISIP (Informationssystem Integrierte Pflanzenproduktion). The target group are agricultural consulting services and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Biodiversity and ecosystem services; Soil quality; Air and water emissions; Composting and manuring; "Organics" in general; Crop combinations and interactions; Post harvest management and techniques.
Ano: 2007
URL: http://orgprints.org/9620/1/9620_Jost_Vortrag.pdf

Udvaskning af organisk kulstof efter kløvergræs
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.; Hansen, E.M.; Eriksen, J.
Opløst organisk stof danner grundlaget for mange af de biogeokemiske processer der foregår i jorden. Der er foretaget talrige undersøgelser af dannelse og tab af organisk stof fra skovjorde, hvorimod kun få er gennemført i landbrugsjord. Det vides at græsmarker øger jordens pulje af organisk stof, men kendskabet til det organiske stofs skæbne efter ompløjning af græsmarker er mangelfuldt. Formålet med denne undersøgelse var at bestemme størrelsesordner for udvaskning af opløst organisk kulstof (DOC) og den samlede mængde mobilt organisk kulstof (MOC) i dyrkningssystemer med kløvergræs, med særlig fokus på perioden efter ompløjning af græsmarken. Undersøgelserne er gennemført dels i Foulum i et markforsøg anlagt med henblik på at måle kvælstofudvaskning og...
Tipo: Report chapter
Palavras-chave: Nutrient turnover; Pasture and forage crops; Air and water emissions.
Ano: 2005
URL: http://orgprints.org/5373/1/5373.pdf

Erstellung und Prüfung von Verfahren zur Abschätzung des N-Umsatzes im Rahmen der Humusreproduktion im ökologischen Landbau
Provedor de dados: Organic Eprints
Ziel des Projektes der Sächsischen Landesanstalt für Landwirtschaft (LfL) in Zusammenarbeit mit dem Umweltforschungszentrum Leipzig-Halle (UFZ) ist es, aus bekannten Verfahren zur Beschreibung der Kohlenstoffdynamik in der organischen Bodensubstanz und zur Abschätzung der Höhe der N-Mineralisierung Methoden auszuwählen, diese weiter zu entwickeln und zu vereinfachen, so dass sie von Beratern und Landwirten als quantitative Instrumente zur Humusbilanzierung und zum N-Management von Betrieben des ökologischen Landbaus eingesetzt werden können.  Dazu werden für den praktischen Einsatz potenziell geeignete Modelle anhand der Veränderungen der organischen Kohlenstoff- und Stickstoffgehalte des Bodens in Langzeitversuchen auf ihre Genauigkeit überprüft sowie...
Tipo: Project description
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Technology transfer; Air and water emissions; Composting and manuring.
Ano: 2023

All ull er verdifull.  Kompostering av ull i talle og spørreundersøkelse om bruk av ull i Fosenregionen
Provedor de dados: Organic Eprints
Autores: McKinnon, Kirsty; Lennon, Alana; Andresen, Berit Langdahl.
Ull er et næringsrikt materiale og lavverdiull (skitten, filtet og noen fraksjoner av pigmentert ull)kan ha verdi som en næringsstoffressurs i landbruket. Rapporten omhandler en kartlegging av slik ull gjennom en spørreundersøkelse blant sauebønder i Fosenregionen. Flere gårdbrukere svarte at de kaster eller brenner ullen og noen sa de ønsker seg kunnskap om alternative måter å bruke ullen på. I prosjektet ble ull undersøkt som bestanddel i talle med halm til sau. Tallen ble siden lagt opp i komposter. Etter å ha vært først i talle og deretter i kompost, var ullen på god vei til å brytes ned. Hvorvidt komposten hadde tilfredsstillende spredeegenskaper ble ikke undersøkt i dette forsøket. Forholdet mellom karbon og nitrogen (C/N-forholdet) var forholdsvis...
Tipo: Report
Palavras-chave: Nutrient turnover; Sheep and goats.
Ano: 2019
URL: http://orgprints.org/34409/1/NORS%C3%98K%20RAPPORT%201%202019%20Ull%20i%20talle.pdf

A Guide to Nutrient Budgeting on Organic Farms
Provedor de dados: Organic Eprints
Autores: Watson, Christine; Topp, Cairistiona F E; Stockdale, Elizabeth.
The leaflet gives practical guidance on using data and calculating farm-gate nutrient budgets with sections on soil analysis, nutrient inputs, nutrient losses and flows, nitrogen fixation through leys and how inputs and outputs from organic manures and livestock feed can be recorded. It contains one example table of a farm-gate annual nutrient budget for a mixed cattle and arable farm.   The tool is specific to organic farming. It was drafted for the UK but has relevance in other countries.
Tipo: Practice tool
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2010
URL: http://orgprints.org/31654/1/a-guide-to-nutrient-budgeting-on-farms.pdf

Drivhusgas fra energi-afgrøder
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.
Udledning af drivhusgas ved dyrkning af energiafgrøder kan ophæve en betydelig del af den drivhusgasgevinst, der er forbundet med biobrændsler.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2010
URL: http://orgprints.org/18326/4/18326.pdf

Are we mining the soil ?
Provedor de dados: Organic Eprints
Autores: Bliss, Katie; Davies, Olivia; Smith, Laurence; Mullender, Samantha.
Seven organic farms took the opportunity to look at one or more of their fields. They gained insights into their rotations and NDICEA seems to be a useful tool for assessing nitrogen supply/losses throughout a rotation.   The results on the farms indicate that there is a danger of losing nitrogen even in organic rotations. In the video, the researcher summarises the results and one of farmers taking part shares his thoughts. The common conclusions are that spring ley cultivation and strategic use of organic fertilisers are possible strategies for improving nutrient balances in organic farming. 'Flying livestock' and innovative strategies to keep the soil covered (e.g. living mulches, undersowing) may also help.
Tipo: Practice tool
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/32847/2/video.php_y%3Dhttps_%252F%252Fwww.youtube.com%252Fwatch_v%3Dlv2bX7-XSO8

A rainfall simulation study on the relationships between soil test P versus dissolved and potentially bioavailable particulate phosphorus forms in runoff
Provedor de dados: Organic Eprints
Autores: Uusitalo, Risto; Aura, Erkki.
Runoff from clayey soils often contains abundant particulate phoshorus (PP), part of which may solubilize in surface waters. Monitoring losses of potentially bioavailable forms of PP is expensive, calling for other ways to predict them. Such predictions could be based on soil loss and available soil P indices, e.g., agronomic P status. To study correlations between P pools in runoff versus soil P saturation (by Mehlich 3 extraction; DPSM3) and acetate soil test P (PAc), 15 clayey soils of south Finland were subjected to laboratory rainfall simulation. Runoff from these simulations was analyzed for concentrations of suspended soil (TSS), dissolved molybdate-reactive P (DRP), total P (TP), and, as normalized to soil loss, potentially bioavailable forms of...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/16844/1/uusitalo.pdf

Roots below one meters depth are important for nitrate uptake by annual crops
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
The root depths of annual crops vary from 0.2 m to more than 2 m depending on root growth rate and length of growing season. However, studies of root growth and N uptake are often restricted to a depth of 1 m or less, as root biomass is assumed to be negligible below this depth. We have studied the importance of root growth and N uptake to a depth of 2.5 m in fully grown field vegetables and cover crops by use of minirhizotrons and deep point placement of 15N. Deep rooted crucifereous crops were found to have high root densities to a depth of 1.5-2 m and high 15N uptake to this depth. The work shows that knowledge of the interactions between root growth and soil N below a depth of 1 m are important to understand crop N uptake and nitrate leaching from...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Vegetables.
Ano: 2006
URL: http://orgprints.org/11461/1/Deep_Roots_and_N_Uptake.htm

Organik Kivi Üretiminde Toprak Düzenleyicilerin ve Organik Materyallerin Verim ve Bazı Meyve Özellikleri Üzerine Etkileri
Provedor de dados: Organic Eprints
Autores: Ozyazıcı, Gulen; Ozdemir, Osman; Ozyazıcı, Mehmet Arif.
Bu çalışma, Samsun Toprak ve Su Kaynakları Araştırma Enstitüsü Deneme İstasyonunda, kivi üretiminde, yöresel organik artık olan fındık zurufunun (taze ve kompost hali) organik ticari gübrelerin yerine ikame edilme durumunu ve kullanılan miktarın azaltılıp azaltılamayacağını ortaya koymak amacıyla 2008-2009 yıllarında yürütülmüştür. Toprak düzenleyici olarak klinoptilolit ve leonardit, organik ticari gübre  (biofarm), yöresel atık olan fındık zurufunun iki farklı kullanım şekli (taze ve kompost) araştırmanın materyalini oluşturmaktadır. Araştırma, tesadüf bloklarında bölünmüş parseller deneme desenine göre 3 tekerrürlü olarak yürütülmüştür. Fındık zurufu ve biofarm, azot içerikleri göz önüne alınarak, toprak analiz sonuçlarına göre parsellere uygulanmıştır....
Tipo: Conference paper, poster, etc.
Palavras-chave: Farming Systems; Nutrient turnover; Farm nutrient management.
Ano: 2010
URL: http://orgprints.org/18590/1/G%C3%BClen_%C3%96zyaz%C4%B1c%C4%B1_organik_kivi.pdf

Linee guida per il ripristino della funzionalità del suolo nei vigneti
Provedor de dados: Organic Eprints
Autores: Priori, S.; D'Avino, L.
Guidelines for soil functionality restoration in degraded areas of vineyard (Italian language)
Tipo: Teaching resource
Palavras-chave: Soil quality; Crop combinations and interactions; Soil biology; Composting and manuring; Nutrient turnover; Soil; Biodiversity and ecosystem services; Viticulture.
Ano: 2018
URL: http://orgprints.org/33838/1/Guidelines_Resolve_soil_restoration_techniques_ITALIAN.pdf

Phosphorus Management on ‘Extensive' Organic Farms with Infertile Soils
Provedor de dados: Organic Eprints
Autores: Cornish, P. S.
Two case-study farms with negative P balances maintained acceptable productivity without fertilisers, apparently by ‘mining’ ‘available’ P reserves in surface and subsoil.  The question for these organic farms is ‘how long before fertiliser is needed?’  With six farms on lower-fertility, weakly acidic to alkaline soils and modest rainfall (380-580 mm/yr), low productivity was related to P deficiency despite positive P balances from using allowable fertilisers. Useful supplies of compost or manure were unavailable.  Until effective allowable fertilisers or microbial inoculants have been developed, there is a case for using soluble forms of P fertiliser on soils where soil-solution P is low and soil P-sorption is high, so that additions of soluble P ‘feed...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2007
URL: http://orgprints.org/9905/1/Cornish%2D2007%2Dphosphorus_management.pdf

Hoftor-Bilanz von Phosphor und Kalium in Öko-Milchviehbetrieben
Provedor de dados: Organic Eprints
Autores: Leisen, Edmund.
Between April 2014 and March 2015 farm-gate balances of phosphorus and potassium have been calculated on 82 Organic Farms. Results as follow: An additional fertilization with phosphorus, at least on the long run, seems to be  necessary to adjust negative phosphorus balances. Potassium also often shows negative balances, especially when leaching losses are considered. However, as long as the K-contents in the plants are high, additional potassium fertilization is not  necessary, especially when aspects of animal nutrition are considered.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Composting and manuring; Nutrient turnover; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/31553/1/Hoftor-Bilanz%20von%20Phosphor%20und%20Kalium%20in%20%C3%96ko-Milchvieh-.pdf

Improving the sustainability of crop nutrition in horticultural soil
Provedor de dados: Organic Eprints
This project aims to improve undestanding of the chemical and microbiological factors that control nutrient supply in horticultural soil so that inputs can be adjusted to maximise production efficiency and minimise pollution.
Tipo: Project description
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2023

Catch Crops in Organic Farming Systems without Livestock Husbandry - Model Simulations
Provedor de dados: Organic Eprints
Autores: Müller, Dr. Torsten; Magid, Dr. Jakob; Jensen, Dr. Lars Stoumann; Nielsen, Dr. Niels Erik; Thorup-Kristensen, Dr. Kristian.
During the last years, an increasing number of stockless farms in Europe converted to organic farming practice without re-establishing a livestock. Due to the lack of animal manure as a nutrient input, the relocation and the external input of nutrients is limited in those organic cropping systems. The introduction of a one-year green manure fallow in a 4-year crop rotation, including clover-grass mixtures as a green manure crop is the classical strategy to solve at least some of the problems related to the missing livestock. The development of new crop rotations, including an extended use of catch crops and annual green manure (legumes) may be another possibility avoiding the economical loss during the fallow year.   Modelling of the C and N turnover in...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Production systems; Crop combinations and interactions; Vegetables; Soil biology.
Ano: 2002
URL: http://orgprints.org/127/1/0830.pdf

Jordliv, foredrag for studenter
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun.
Foredrag om økosystemet i jorda
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Soil biology; Nutrient turnover.
Ano: 2017

Kohlenstoffflüsse und mikrobielle Diversität
Provedor de dados: Organic Eprints
Organic farming is one of the most promising alternatives to intensive agriculture. Crop plant-soil interactions are complex and influenced by agricultural practice. Many efforts have been done to elucidate the effects of different farming systems on crop growth, nutrient availability, soil quality and biodiversity. Many studies however are short-termed and rely on laboratory rather than comparative field experiments. The DOK field trial at Therwil (Basel-Land, Switzerland) is one of the few long-term field trials that compare organic and integrated farming systems since 1978 (Mäder et al. 2002, http://www.fibl.org/). Soils of this field trial have been extensively studied with respect to soil nutrient delivery, soil biology and microbial biodiversity....
Tipo: Project description
Palavras-chave: Nutrient turnover; Soil.
Ano: 2023

Effects of timing of sulfur application and nitrogen fertilization on yield and quality of barley
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
The effect of S and N application on the redistribution of S and the effect of N application and time of S application (from sowing to the middle of heading) on yield and quality of spring barley (Hordeum vulgare L.) was investigated in pot experiments. Nitrogen and sulphur had a clear interactive effect on the yield of all plant parts with little or no effect of S at low N application rates and similar low effect of N without S application. About 70% of leaf N was redistributed to the ears in plants growing at adequate S supply compared with about 35% of leaf N in S-deficient plants.  The proportion of ear N and S originating from the redistribution of leaf N and S was 49% and 23%, respectively.   Deficiency symptoms were observed already at the beginning...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/234/1/J_Eriksen_abstract.doc

The effects of compost and compost extract on soil properties and lettuce growth.
Provedor de dados: Organic Eprints
Autores: CAVOSKI, Ivana.
The work was conducted at the experimental field of the Mediterranean Agronomic Institute of Bari, Italy in 2004. The aim was to study the effects of compost and compost extract on soil properties and lettuce growth. The chemical, biological and phytotoxic tests of compost extract proved its high  selected soil properties (pH, EC, Organic matter, available nutrients, cations and anions contents) markedly with depth and time, the most prominent changes showed by compost extract application. The applications of compost and compost extract significantly increased lettuce growth, yield, yield components and storage, all were highly significantly influenced by compost. The relation between chlorophyll-meter readings and nitrogen concentration showed highly...
Tipo: Thesis
Palavras-chave: Nutrient turnover; Vegetables; Soil quality; Composting and manuring.
Ano: 2004
URL: http://orgprints.org/6871/1/IvanaCavoski04.pdf

Grøngødning som kvælstofkilde
Provedor de dados: Organic Eprints
Autores: Korsgaard, Maren.
Bælgplanterne rummer jordens smarteste gødningsfabriker. I rodknoldene samarbejder de kvælstofsamlende bakterier med planten om at producere proteiner. Energien leveres af solen, råstofferne er luftens kuldioxyd og kvælstof, og det eneste affaldsprodukt er ilt. Renere produktion findes vist ikke. Gødningsfabrikationen sker helt lokalt i din egen mark, så gødningen er allerede placeret, klar til den efterfølgende afgrøde. Det er simpelthen en smart måde at gøde sine marker på.
Tipo: Report chapter
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/27265/6/27265.pdf

Ertragspotentiale ökologischer Anbausysteme aus pflanzenbaulicher Sicht
Provedor de dados: Organic Eprints
Autores: Neuhoff, Daniel.
The potential of Organic Agriculture to feed the world is currently under discussion. Contrasting statements concerning this issue are mainly due to missing distinction between socio-economic and biophysical impact factors, to methodical issues of yield comparisons and to sole regional observations. Instead of comparing individual data sets in meta-analyses it is proposed to explore yield potentials of different systems from an agronomic perspective. Yields in organic systems are predominantly restricted by  N-availability as a function of legume growing. The potential of replacing mineral N by biological nitrogen fixation differs between regions, but generally limits the productivity of cereals. A major determinant for legume cultivation is low pressure...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/27193/1/27193_neuhoff.pdf

Improving nitrogen recovery from green manure on contrasting soil types under cold climate conditions
Provedor de dados: Organic Eprints
Autores: Frøseth, Randi Berland; Hansen, Sissel; Thorup-Kristensen, Kristian; Bleken, Marina Azzaroli.
We evaluated the effects of various strategies for green manure management, including biogas production and using the herbage-based digestate as fertilizer, on the yield and N recovery of a subsequent spring barley crop. Of the various green manure herbage measures tested, the digestate strategy was be the most promising option with regard to reduced risk of N losses and improved N recovery by a subsequent spring barley crop. Removal of the herbage reduces the risk of N losses from the crop rotation, since such losses are highly dependent upon the N input and weather conditions. This study suggests that  fundamental model changes are needed for simulating the effects of low temperatures on N mineralization from fresh plant material.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2016
URL: http://orgprints.org/31210/1/Fr%C3%B8seth%20et%20al.%202016.%20IMPROVING%20NITROGEN%20RECOVERY%20FROM%20GREEN%20MANURE%20ON%20CONTRASTING%20SOIL%20TYPES%20UNDER%20COLD%20CLIMATE%20CONDITIONS.%2019th%20N-Workshop.27%20-29%20June%2C%20Skara%20Sweden.%20poster.pdf

Recirkulering af planteaffald som kompost  og samdyrkning af grøntsager
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne Lakkenborg.
Core organic cofund projekt bevilget i 2018, om udvikling af nye økologiske dyrkningssystemer til produktion af grøntsager. Målet er at forbedre systemernes bæredygtighed og resiliens, recirkulering af næringsstoffer og jordens lagring af kulstof.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Crop combinations and interactions; Composting and manuring; Nutrient turnover; Vegetables; Biodiversity and ecosystem services.
Ano: 2019
URL: http://orgprints.org/34479/3/AU-5%20Poster%20Recirkering%20af%20planteaffald%20som%20kompost%20HLK%20Jan-19_34479.pdf

Steigerung der Produktionsintensität im Ökologischen Landbau: Ergebnisse einer 14jährigen Fallstudie am Beispiel des Lehr- und Versuchsbetriebes Gladbacherhof
Provedor de dados: Organic Eprints
Autores: Sommer, Hendrik; Schmid-Eisert, Andreas; Franz, Klaus; Leithold, Günter.
Anpassungs- und Spezialisierungsdruck auf die ökologisch wirtschaftenden Betriebe steigen durch die wachsende Dominanz des Lebensmitteleinzelhandels, eine steigende Anonymität der Erzeuger sowie einen immer stärker werdenden Wettbewerb durch Globalisierung. Sinkende Erlöse und wachsender Kostendruck zwingen den einzelnen Betrieb, die Produktionsintensität zu steigern, um im Wettbewerb besser bestehen zu kön¬nen. Alternative Entwicklungsstrategien können darin liegen, betriebliche Ressourcen zu optimieren (z.B. rationellerer Futtereinsatz), zu expandieren (z.B. Betriebsvergrößerung) und/oder die Produktivität zu steigern (z.B. Erhöhung der Milchleistung je Kuh). Anhand der Entwicklung des Lehr- und Versuchsbetriebes der Justus-Liebig-Universität Gießen,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2011
URL: http://orgprints.org/17539/3/Sommer_17539.pdf

Program til bedre rådgivning om sædskifter i økologisk jordbrug
Provedor de dados: Organic Eprints
Autores: de Visser, Richard.
Artiklen beskriver brug af NDICEA modellen som beslutningsstøtte til udvikling af bedre sædskifter i økologisk jordbrug. Modellen beregner og synliggør betydningen af afgrødevalg, gødning og vejrforhold for udviklingen i jordens indhold af kvælstof og organisk stof, og kvælstof der optages af afgrøderne eller tabes ved udvaskning
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Air and water emissions; Farm nutrient management.
Ano: 2013
URL: http://orgprints.org/24773/7/24773.pdf

Husdyrgødning og kompost. Næringsstofudnyttelse fra stald til mark i økologisk jordbrug
Provedor de dados: Organic Eprints
En af de grundlæggende målsætninger i økologisk jordbrug er i størst muligt omfang at recirkulere og holde hus med plantenæringsstoffer. Tab af plantenæringsstoffer kan skade det omgivende miljø og begrænse planteproduktionen; derfor skal tabet være mindst muligt. Bl.a. med henblik på at optimere udnyttelsen af husdyrgødning og kompost er der i de senere år udført en række forskningsprojekter i regi af FØJO. Denne rapport bygger dels på resultater fra afsluttede FØJO-projekter, dels på indlæg, som blev givet på et møde på Sandbjerg Gods i februar 2000. Dette møde havde formål at belyse og diskutere forskningen i et forum af landmænd, rådgivere og forskere. For hvert indlæg havde en af deltagere ansvaret for at tage noter, dels fra selve indlægget og dels...
Tipo: Report
Palavras-chave: Nutrient turnover.
Ano: 2000
URL: http://orgprints.org/3033/1/Rap_07.pdf

Ældre marker med kløvergræs kan beskytte grundvandet mod nitrat
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Vinther, F.P.; Søegaard, K.
Ændringen i EU's landbrugspolitik (CAP) indebærer en afkobling af landbrugsstøtten og en afvikling af den nuværende hektarstøtte.     Derved øges græsmarkernes værdi fordi græs vil konkurrere bedre med de øvrige grovfoderemner rent prismæssigt.  I fremtiden forventes derfor en betydelig højere græsandel i kvægbrugenes sædskifter end det er tilfældet i dag.    Samtidig betyder strukturudviklingen, at kvæggårdene bliver større og et stigende antal brug ikke kan afgræsse alle marker i sædskiftet, da afgræsning langt fra gården er besværlig eller helt uforeneligt med de daglige rutiner.     Disse forhold forventes at bevirke, at der på kvægbrugene fremover vil være græsmarker, som får lov til at blive betydeligt ældre end de 2-3 år, der hidtil har været mest...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/5478/1/5478.PDF

Are organic arable rotations mining the soil?
Provedor de dados: Organic Eprints
Autores: Mullender, Samantha.
Organic principles and standards emphasise the importance of practices that encourage long-term health and  fertility of agricultural soils. Effective crop rotation, cultivation regimes and organic fertiliser application are important elements of the organic approach. Whilst such practices can undoubtedly increase the soil’s health, their true impact is still uncertain, particularly with regard to soil nutrient and organic matter contents. The articles explains how modelling some organic rotations on UK farms as part of the OK-Net Arable project  produced some challenging results.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32848/1/Mullender_2017_NDICEA%20ORC123_p8-9.pdf

Winter cereal yields as affected by animal manure and green manure in organic arable farming
Provedor de dados: Organic Eprints
Autores: Olesen, Jørgen Eivind; Askegaard, Margrethe; Rasmussen, Ilse A.
The effect of nitrogen (N) supply through animal and green manures on grain yield of winter wheat and winter rye was investigated from 1997 to 2004 in an organic farming crop rotation experiment in Denmark on three different soil types varying from coarse sand to sandy loam. Two experimental factors were included in the experiment in a factorial design: 1) catch crop (with and without), and 2) manure (with and without). The four-course crop rotation was spring barley undersown with grass/clover - grass/clover - winter wheat or wheat rye - pulse crop. All cuttings of the grass-clover were left on the soil as mulch. Animal manure was ap-plied as slurry to the cereal crops in the rotation in rates corresponding to 40% of the N de-mand of the cereal crops....
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions.
Ano: 2009
URL: http://orgprints.org/16309/1/16309.pdf

NDICEA - Nitrogen Planer – version 6.2
Provedor de dados: Organic Eprints
Autores: Burgt, G.J.H.M.
NDICEA presents an integrated assessment of the question of nitrogen availability for organic crops.  During the growing season, the model compares net available nitrogen from manures, crop residues, green manures, additional fertilisers and the soil, with the crop specific demand on a daily basis. The release of nitrogen from different types of organic matter in the soil is calculated, considering soil type, temperature, rainfall and losses due to leaching and denitrification.   The NDICEA model has been developed, tested and used during more than 15 years by the Louis Bolk Instituut in the Netherlands. The interface is user-friendly, with complex calculations in the background. This offers an easy way to obtain a reliable indication of the nitrogen and...
Tipo: Practice tool
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/31675/6/NDICEA_Cover.png

Produção de Jatropha curcas em sistema agroecológico.
Provedor de dados: Organic Eprints
Autores: Castro, Cristina Maria de; Devide, Antonio Carlos Pries.
Sistema de produção agroecológico de pinhão manso - Jatropha curcas para fins de biodiesel. A pesquisa visa o balanço energético positivo do sistema e melhorias ambientais: do solo, da água, vegetação espontânea, organismos vivos, dentre outras. É parte do projeto de pesquisa financiado pelo CNPq Edital 39/2007, finalizado em 2012. O sistema continua a ser pesquisado. As imagens são relativas ao período de repouso vegetativo quando as plantas desenvolvem hábito caducifólio. Cobre=indo o solo, amendoim forrageiro - Arachis pintoi, previamente à roçada para adubação verde no ciclo de rebrota do pinhão manso.
Tipo: Image
Palavras-chave: Farm economics; Farming Systems; Nutrient turnover; Soil; Environmental aspects; Farm nutrient management.
Ano: 2013
URL: http://orgprints.org/24820/1/DSC07997.JPG

Informe: Finca Experimental La Higueruela (Spain)
Provedor de dados: Organic Eprints
The experimental farm La Higueruela is located in Santa Ollala (Toledo, Spain), 80km far from Madrid. It has a 90 hectares surface.  It belows to the Environmental Sciences Center of the Spanish National Research Council (CSIC)since 1972. During this period many scientists from this organism and other institutions (University, National and Regional public research centers and private enterprises) have developed their trials here.  The orchard is inserted in a typical  Spanish dryland. Unirrigated lands  represent the 80 percent of the Spanish territory and it is one of the most complex systems to study. One square meter of surface has more biodiversity than one hectare in humid Europe. Extensive arable crops and fallow lands mosaic constitutes one of the...
Tipo: Research facility description
Palavras-chave: Nutrient turnover; Soil tillage; Weed management.
Ano: 2023
URL: http://orgprints.org/21897/1/2010%20Finca%20La%20Higueruela_paraORGPRINTS.pdf

Muutused mulla mikroobide hüdrolüütilises aktiivsuses ja orgaanilise süsiniku sisalduses punase ristiku allakülviga odra kasvatamisel
Provedor de dados: Organic Eprints
Autores: Kuht, Jaan; Alaru, Maarika; Eremeev, Viacheslav; Talgre, Liina; Loit, Evelin; Luik, Anne.
Uurimistulemustest selgus, et punase ristiku allakülviga odra kasvatamine avaldas soodsat mõju mulla mikroorganismidele, suurendades mullaorganismide hüdrolüütilist aktiivsust. Mulla mikroobide hüdrolüütilise aktiivsuse (FDA) määramistulemused olid pärast punase ristiku allakülviga odra kasvatamist tavaviljeluse aladel 18,6% ja mahealadel 37,2% võrra suuremad võrreldes eelvilja (kartuli) alt vabanenud ala mullaga. Katseaastate keskmisena tõusis orgaanilise süsiniku (Corg %) sisaldus maheviljelusviisides 11,6% võrreldes tavaviljelusega. Pärast allakülviga odra kasvatamist võrreldes selle eelsega Corg sisalduses olulisi usaldusväärseid muutusi ei täheldatud. Enne allakülviga odra kasvatamist seos FDA ja Corg vahel sisuliselt puudus. Küll aga esines tugev...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farming Systems; Soil biology; Nutrient turnover; Crop husbandry.
Ano: 2018
URL: http://orgprints.org/32794/1/Kuht%20et%20al%202018.pdf

Controlled traffic farming increased crop yield, root growth, and nitrogen supply at two organic vegetable farms
Provedor de dados: Organic Eprints
Autores: Hefner, M.; Labouriau, R.; Nørremark, Michael; Kristensen, Hanne Lakkenborg.
Increased farm machinery weight in agricultural production results in soil compaction. Controlled traffic farming (CTF) restricts traffic to permanent lanes, thereby creating traffic free beds for crop production. Field experiments were conducted at two organic vegetable farms in Denmark, on a sandy loam (2013–2016) and on coarse sand (2013–2015) to investigate CTF effects compared with random traffic farming (RTF) on vegetable yield, root growth, and soil mineral nitrogen (N). Root growth was measured using minirhizotrons. White cabbage, potato, and beetroot yield increased by 27%, 70% and 42%, respectively, in CTF compared with RTF in 2015 and winter squash indicated a yield increase of 43% on sandy loam in 2016. White cabbage (2015) and potato, beetroot...
Tipo: Journal paper
Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover; Soil tillage; Air and water emissions; Vegetables; Root crops.
Ano: 2019
URL: http://orgprints.org/35456/1/Hefner%20et%20al%202019%20Controlled%20traffic%20farming.pdf

Effects of anaerobic digestion of organic manures on N turnover and N utilization
Provedor de dados: Organic Eprints
Autores: Sørensen, Peter; Khan, A R; Møller, Henrik B.; Thomsen, Ingrid Kaag.
Animal manures and plant-based manures are used for biogas production by anaerobic digestion (AD). After AD the concentration of ammonium-N in manure is increased and the concentration of decomposable C is decreased. Thus, the potential first year fertilizer value of the manure can be increased by the treatment. However, pH is also increased by AD thereby increasing the risk of ammonia losses. The objective of this paper was to compare N turnover in soil after application of digested and corresponding undigested manures, and to compare N fertilizer values of digested manures after direct injection or surface-banding in cereals.   After AD of pig and cattle slurry the increase in potential plant availability was equivalent to 10-25% of total manure N. AD of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/21820/1/21820.pdf

PC-Programm BEFU, Teil Ökologischer Landbau: Verfahren zur Grunddüngung, Nährstoff- und Humusbilanzierung
Provedor de dados: Organic Eprints
Autores: Köhler, Brigitte; Kolbe, Hartmut.
Das PC-Programm BEFU zur Optimierung der Düngung, Nährstoff- und Humusbilanzierung wurde nun für ökologisch wirtschaftende Betriebe angepasst. Das Programm bietet Unterstützung bei der im Rahmen von Düngeverordnung und Cross Compliance geforderten Nährstoffvergleiche und Humusbilanzierungen. Gleichzeitig sind Berechnungen zur Betriebs- und Fruchtfolgegestaltung möglich. Damit erleichtert das Programm Landwirten die Erfüllung der zunehmenden Dokumentationspflichten auch im Bereich der Kontrolle zur EU-Öko-Verordnung. Darüber hinaus ist das Programm zum Einsatz in der vertieften Betriebsberatung geeignet. Es kann zur Aufdeckung von Schwachstellen und zur Optimierung des Nährstoffmanagements auf den Betrieben eingesetzt werden. Das PC-Programm ist für...
Tipo: Working paper
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover; Technology transfer.
Ano: 2008
URL: http://orgprints.org/13628/1/kolbe%2D2008%2D13628%2DVeroeffProgramm_BEFU_Beschreibg.pdf

Økologisk jordbrug til beskyttelse af grundvand
Provedor de dados: Organic Eprints
Autores: Jacobsen, O.H.; Vinther, F.P.; Schjønning, P.; Hansen, E.M.; Eriksen, J.
I Danmark har det høj prioritet, at vi kan drikke vores grundvand uden rensning. Der er en voksende erkendelse af, at rent grundvand kun kan opretholdes gennem en aktiv indsats. Amterne udpeger områder med særlig drikkevandsinteresser og efterfølgende zonerer de for arealer der er særlig nitrat- og pesticidfølsomme. En perspektivrig mulighed for at regulerede i forureningsfølsomme om-råder kan være, at man udlagde større sammenhængende arealer med  økologisk jordbrug. Først og fremmest undgår man helt brug af pesticider. For kvælstof,  vil tabet være afhængig af det økologi-ske dyrkningssystem og det er det der er fokus for denne undersøgelse.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/5957/1/5957.doc

Changes of yield responses and soil test values in Finnish soils in relation to cumulative phosphorus and potassium balances
Provedor de dados: Organic Eprints
Autores: Saarela, Into.
Field experiments with five rates of annual P fertilisation were carried out at 24 sites in Finland 1977-1994. A summary of the yield results was calculated on the basis of the amounts of P recommended to cereals according to STP in early 1990s.    The effects of repeated K fertilisation were studied at 21 sites in 1977-1994.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/15813/1/longterm.pdf

Bilanzierungsmethoden und Versorgungsniveau für Humus
Provedor de dados: Organic Eprints
Autores: Kolbe, Hartmut.
Dem Humus bzw. der organischen Substanz des Bodens werden vielfältige Funktionen und Aufgaben der Bodenfruchtbarkeit zugeschrieben. Es ist auf eine ausgeglichene Versorgung der Ackerschläge mit organischer Substanz zu achten. Als betriebliches Hilfsmittel ist der Einsatz der Humusbilanzierung gut geeignet.  Im ersten Beitrag der Schriftenreihe werden die bisher verfügbaren Untersuchungen zur Charakterisierung der Genauigkeit und Eignung der Methoden zur Humusbilanzierung zum Einsatz in der konventionellen und ökologischen Landwirtschaft beschrieben. Im zweiten Beitrag werden Ergebnisse der Humusbilanzierung der Dauertestflächen und von landwirtschaftlichen Betrieben aus Sachsen zusammengetragen und nach verschiedenen Kriterien ausgewertet. Die Versorgung...
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover; Research methodology and philosophy; Environmental aspects; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/20826/1/Bilanzierungsmeth_Versorgungsniveau_Humus_Schriftenr_19_12].pdf

Nematoder sirkulerer næringsstoffer i jord
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun; Magnusson, Christer.
Nematoder i jord, biologi og økologi.
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Soil.
Ano: 2011
URL: http://orgprints.org/30205/1/TEMA_6_16_Nematoder%20endelig.pdf

Nutrient supply from organic amendments applied to  unvegetated soil, lettuce and orchardgrass
Provedor de dados: Organic Eprints
Autores: Hammermeister, A.M.; Astatkie, T.; Jeliazkova, E.A.; Warman, P.R.; Martin, R.C.
Organic sources of nutrients are increasingly being used in horticultural and certified organic production. The nutrient-supplying potentials of poultry manure compost (PM), feather meal (FM), alfalfa meal (AA) and vermicastings (VC) and an unamended control were measured in a growth room experiment. The amendments were applied at rates equivalent to 200, 400 and 800 kg total N ha-1 to a soil of low fertility. Nitrogen supply rates and concentrations were measured over 6 mo in unvegetated pots using PRS™ probes and KCl extraction, respectively. Biomass of lettuce (Lactuca sativa L.) and orchardgrass (Dactylis glomerata L.) and N uptake of orchardgrass were measured. Repeated measures analysis revealed significant amendment × rate × time interaction effects...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil.
Ano: 2006
URL: http://orgprints.org/19295/4/19295.pdf

Alteração nos teores de carbono e fósforo orgânico em um Latossolo após 23 anos sob diferentes preparos de solo e culturas de inverno
Provedor de dados: Organic Eprints
Autores: CASALI, C.A.; TIECHER, T.; SANTOS, D.R.; CALEGARI, A.; PICCIN, R.; BENDER, M.A.; GUBIANI, E.; BELLINASO, R.J.S.; Schaefer, G.
O fósforo (P) orgânico é importante fonte de fosfato para as plantas, tanto em ambientes naturais quanto em solos cultivados. O cultivo de plantas com alta capacidade de reciclagem de P pode aumentar a importância das formas orgânicas na disponibilização de fosfato, especialmente quando o solo não é revolvido O presente estudo objetivou avaliar em um solo muito argiloso sob longo período de cultivo (i) o efeito de diferentes preparos de solo e (ii) o efeito do cultivo de diferentes espécies de plantas de inverno, no teor de carbono e fósforo orgânico do solo. Em 1986 foi estabelecido o experimento com seis tratamentos de inverno (tremoço azul, ervilhaca peluda, aveia preta, nabo forrageiro, trigo e pousio) implantados num Latossolo Vermelho Aluminoférrico...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil tillage; Greenhouses and coverings.
Ano: 2012
URL: http://orgprints.org/29929/1/2012%20-%20Casali%20-%20Tales%20Fertbio.pdf

Supply Chain Workshop afdækkede både muligheder og barrierer
Provedor de dados: Organic Eprints
Autores: Mathiesen, Camilla; Tersbøl, Michael.
14. juni 2011 blev der holdt Supply Chain Workshop i projektet HighCrop, som er et forskningssprojekt under det nye forskningsprogram Organic RDD under ICROFS og GUDP. Den fulde titel for projektet er Højere produktivitet i dansk økologisk planteproduktion, og baggrunden for projektet er de udfordringer, de økologiske planteavlsbedrifter står overfor: Mangel på stigende udbytter, en målsætning om udfasning af konventionel gødning og halm samt arbejdet mod mindre miljøpåvirkning og ønsket om at blive selvforsynende med energi.
Tipo: Working paper
Palavras-chave: Production systems; Composting and manuring; Nutrient turnover.
Ano: 2011
URL: http://orgprints.org/20385/4/20385.pdf

Ingen forskel på nitratudvaskning
Provedor de dados: Organic Eprints
Autores: Berntsen, Jørgen.
Registerdata er blevet anvendt til modelberegninger med DJF’s bedriftsmodel FASSET. Beregningerne viste, at på et udsnit af typiske danske jorde var udvaskningen fra både økologiske og konventionelle planteavlere ca. 36 kg N/ha. Forskellen mellem økologisk og konventionel planteavl kom dog til udtryk i ændringer i organisk stof i jorden. Mens økologerne opbyggede ca. 13 kg N/ha om året, tærede de konventionelle ca. 6 kg N/ha om året på jordens organiske stof.      Modellen blev yderligere brugt til at gennemregne effekten af forskellig driftspraksis. Anvendelse af efterafgrøder var klart det mest effektive virkemiddel til at reducere kvælstofudvaskningen. I gennemsnit over et helt sædskifte blev udvaskningen således reduceret med ca. 9 kg N/ha. Det svarede...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Production systems; Farming Systems.
Ano: 2004
URL: http://orgprints.org/4604/1/4604.doc

Fertilisation en agriculture biologique
Provedor de dados: Organic Eprints
L’objectif du projet est double : cognitif d’une part, avec l’acquisition de connaissances nécessaires à la prévision des mécanismes et des flux impliqués dans les cycles des éléments fertilisants pour les sols et systèmes en agriculture biologique, finalisé d’autre part, avec la gestion des éléments fertilisants et la proposition d’outils de gestion et/ou d’itinéraires techniques qui allient à la fois les contraintes de production et la qualité de l’environnement. Ces 2 objectifs complémentaires seront conduits de façon parallèle : l’acquisition de connaissances alimentera la conception d’outils (paramétrage de modèles…), inversement les travaux plus finalisés pourront renvoyer à des questions de recherches (effet à long terme par exemple). Afin de...
Tipo: Project description
Palavras-chave: Nutrient turnover.
Ano: 2023

Miljøeffekter af trynering og græsmarksstyring
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Ved Danmarks JordbrugsForskning er undersøgt effekten af ringning for både drægtige og diegivende søer. Formålet var samtidigt at undersøge effekten af trynering og dyretæthed på adfærd, græsdække og næringsstofafsætning. I forsøget, som foregik fra maj til slutningen af september, indgik søer med og uden ring. For søer uden ring anvendtes enten kontinuert brug af samme fold eller dobbelt belægning og foldskifte halvvejs.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Pigs; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/10047/1/10047.doc

Sulphate leaching in an organic crop rotation on sandy soil in Denmark.
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Askegaard, M.
Sulphate leaching losses may reduce the long-term possibility of maintaining the S supply of crops in low input farming systems. Sulphate leaching and S balances were investigated in an organic dairy/crop rotation (barley [Hordeum vulgare]  grass-clover [Lolium perenne/Trifolium repens]  grass-clover  barley/pea [Pisum arvénse]  winter wheat [Tritucum aestivum]  fodder beet [Beta vulgaris]) from 1994 until 1998. The importance of climatic conditions and use of different organic manure types at different application rates for sulphate leaching were investigated and related to the concurrent nitrate leaching. As an average of years, sulphate leaching from the crop rotation was 20 kg S ha-1, which was equivalent to 60% of the total input to the rotation....
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2000
URL: http://orgprints.org/144/1/text.doc

New eco-compatible technologies of durum wheat production: a case study on winter wheat living  mulch by sub clover in Southern Italy
Provedor de dados: Organic Eprints
Autores: LI, Mrs Zhifang.
This paper reports the trial comparing N management in two crop systems: winter wheat (Triticum aestivum L.) living mulch with subclover (Trifolium subterraneum L.)  (field 1), and winter wheat pure standing with organic N fertilization  (field 2). Subclover is supposed to fix N2 and to release a part of it to wheat plants. Wheat grain yield in field 1 is 2227kg/ha, in field 2 is 2272kg/ha, with no statistically-significant difference (95% level). However, the wheat biomass accumulation at the start of heading in field 1 (2635kg/ha) is significantly lower than that in field 2 (3100kg/ha). NPK content in wheat plant tissue is also obviously lower in field 1 than in field 2 during the stem extension stage. Soil soluble N content in field 1 is also lower than...
Tipo: Thesis
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Farm nutrient management.
Ano: 2002
URL: http://orgprints.org/6428/1/LiZhifang02.pdf

Interactions between soil organic matter level and soil tillage in a growing crop: N mineralization and yield response
Provedor de dados: Organic Eprints
Autores: Thomsen, I.K.; Sørensen, P.
Effects of organic matter management and soil loosening on the synchrony between soil N mineralization and crop N demand were studied in a field experiment. Four different levels of organic matter (OM) were applied to a crop rotation during 12 years by various applications of animal manure, straw incorporation and catch crop growing. A spring barley crop was grown to test the influence of the previous OM applications. Soil loosening with a row cultivator was carried out one, two or three times in the first part of the growth season to examine the potential for adjusting soil N mineralization by soil tillage in cropping systems with different OM input. Immediately before each of the soil loosenings and again after one, two and three weeks, plant biomass and...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2006
URL: http://orgprints.org/4585/1/4585.doc

Forage legume impact on soil fertility and N balance
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Søegaard, K.; Askegaard, M.; Hansen, E.M.; Rasmussen, J.
Dairy production systems in Europe are to a large extent based on ley-arable rotations. In the ley phase of such rotations nitrogen accumulation occurs as a result of (1) organic carbon accumulation in soil not disturbed by tillage operations and (2) a considerable nitrogen surplus in grasslands, particularly under grazing regimes where a large part of the N in ingested grass is recycled to soil via urine and faeces. The accumulation of N and C in grasslands starts soon after establishment, the rate asymptotically declining with age and depends on practices such as fertiliser level, animal feed composition, stocking density, length of grazing and the botanical composition of the sward. In these pasture systems, key perennial legumes are white clover...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2010
URL: http://orgprints.org/17881/4/17881.pdf

Fertilization of Dioscorea rotundata with poultry manure: effects on nutrient dynamics and nutrient use efficiencies. Awarded poster presentation
Provedor de dados: Organic Eprints
Autores: Andres, C.; NGuessan Diby, L.; Kouamé Hgaza, V.; Frossard, E.
Similar effects of poultry manure (PM) and mineral fertilizer suggest that PM is a cheap and effective alternative to fertilizers for yam production!
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2012
URL: http://orgprints.org/25219/1/andres-etal-2011-awarded-poster-ETH.pdf

Stor produktion af grovfoder og lav nitratudvaskning ved dyrkning af grønbyg med italiensk rajgræs efter kløvergræs
Provedor de dados: Organic Eprints
Autores: Hansen, E.M.; Eriksen, J.; Vinther, F.P.
Har man problemer med kløvertræthed i sine marker kan en løsning være, at dyrke grønbyg (byg høstet ved begyndende skridning) med udlæg af italiensk (ital.) rajgræs. Nye forsøg beskrevet her viser, at dyrkning af grønbyg med udlæg af ital. rajgræs giver mulighed for at reducere udvaskningen af kvælstof (N) til et minimum og samtidig opnå en stor produktion af grovfoder. I modsætning hertil er der normalt stor risiko for udvaskning af kvælstof ved ompløjning af kløvergræs på sandjorde.
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/5475/1/5475.PDF

Økologiske planteavlssædskifter – jordfrugtbarhed  og miljø
Provedor de dados: Organic Eprints
Autores: Olesen, Jørgen E.; Askegaard, Margrethe.
Økologiske planteavlssystemer kræver grøngødning og efterafgrøder for at opbygge jordfrugtbarhed og kulstoflagring, men det kan være med til at øge lattergasudledningerne
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover; Air and water emissions; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/18508/1/18508.pdf

Phosphordüngewirkung karbonisierter Biogasgärreste
Provedor de dados: Organic Eprints
Autores: Leong, KI; Lohr, D.; von Tucher, Sabine; Meinken, E.
P-recycling from biogas residue may play a future key role for sustainable P supply in organic farming. However, in particular transportation costs of residue need to be  reduced e.g. by pretreatment. One approach is carbonization by pyrolysis or hydrothermal carbonization (HTC). In a pot trial with maize on a P-deficient, acidic sandy loam P uptake after application of two chars from pyrolysis (400 and 700 °C) and HTC (6 and 8 h dwell time) all made of the same residue was compared to P uptake after application of the raw residue and water soluble KH2PO4 respectively. P  uptake was the same for KH2PO4, raw residue and both HTC treatments, but was significant lower in treatments with pyrolytic chars. Neither dwell time nor temperature  had an effect....
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31557/1/Phosphord%C3%BCngewirkung%20karbonisierter%20Biogasg%C3%A4rreste.pdf

Jordlevende bakterier
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun; Swensen, Berit.
Bakterier er noen av de minste og mest tallrike organismene i jorda. I ett gram jord kan det være flere milliarder. Det er anslått at det finnes mer enn 60 000 ulike bakteriearter, hvorav de fleste ikke en gang har fått noe navn. Hver av disse har sine spesielle roller og funksjoner. Flest bakterier finner vi i de øvre 10 cm av jordlaget, i rotsonen, meitemarkganger og andre steder  der det finnes organisk materiale.
Tipo: Report
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Soil.
Ano: 2011
URL: http://orgprints.org/30213/1/TEMA_6_17_Bakterier%20endelig.pdf

Einfache Verfahren zur Berechnung der Humusbilanz für konventionelle und ökologische Anbaubedingungen
Provedor de dados: Organic Eprints
Autores: Kolbe, Hartmut.
Bei der Humusbilanzierung wird der anbauspezifische Bedarf der Kulturarten der Humuszufuhr über organische Materialien gegenübergestellt, um so eine Veränderung der Humusvorräte im Boden zu ermitteln. Die Humusbilanz wird auf Basis der Daten einer Schlagbilanz berechnet und kann in zwei Fassungen ausgeführt werden. Die VDLUFA-Methode als Kurzfassung, die auch den gesetzlichen Mindestanforderungen entspricht und einer genaueren Methode, die die Humusreproduktionsleistung unter Beachtung von Standortfaktoren bewertet. Beide Versionen können „von Hand“ oder unter Nutzung eines PC-Programms gerechnet werden.
Tipo: Working paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Technology transfer; Soil quality; Composting and manuring.
Ano: 2008
URL: http://orgprints.org/13626/1/kolbe%2D2008%2D13626%2DVeroeffProgramm_BEFU_BerechngHumusbilanz.pdf

Organic manures as sources of fertiliser sulphur
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
On a global scale, S excretion from domestic animals may be estimated to around 8 million t per year, corresponding to 80% of the World S consumption for mineral fertiliser manufacture. The utilisation of this potential source of fertiliser-S is discussed focusing on the use of manure from housing and manure storages applied to agricultural land. Especially in the developed countries the S content of manure collected from cattle and pigs (1 million t S per year) has a potential as S-fertiliser, as legal demands on the utilisation of manure N and/or P already require the use of animal wastes as fertilisers. Content and composition of manure-S from both monogastrics and ruminants may be extremely variable, depending on the S content of the feed. If the diet...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/3177/1/Paper_JE.doc

The Impact of Site and Management Factors on Humus Dynamics in Long-term Field Experiments
Provedor de dados: Organic Eprints
Autores: Brock, Christopher; Leithold, Prof. Dr. Günter.
The impact of management and environmental site factors on quantitative and qualitative indicators of humus dynamics was investigated in eight long-term field experiments in Germany and neighbouring countries. Humus dynamics were basically influenced by environmental site conditions, but at a given site differences between farming systems could be ascerted. Mixed farming systems with farmyard manure application as a rule had a more favourable impact on humus dynamics than stockless systems. Whether an advantageous performance of humus dynamics in organic farming as compared to conventional farming will occur or not, is dependent on the respective farm types of both systems that are related to each other.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil; Crop husbandry.
Ano: 2008
URL: http://orgprints.org/12536/1/Brock_12536_ed.doc

Auswirkungen des langfristigen ökologischen Landbaus auf bodenbürtige Treibhausgasemissionen
Provedor de dados: Organic Eprints
Autores: Gattinger, Andreas; Skinner, Colin; Krauss, Maike; Mäder, Paul.
Despite the increase in organic cropland, knowledge on the impact of organic farming on soil-derived nitrous oxide (N2O) and methane (CH4) emissions is rather limited. To improve the knowledge base, N2O and CH4 fluxes were investigated in a 571 day lasting cropping sequence in the “DOK” field trial. Two organic and two non-organic farming systems and an unfertilized control were chosen. For the whole monitoring, the two organic systems combined emitted 40% less N2O than the two non-organic ones cumulated on area-scale. Yield-scaled cumulated N2O emissions were nearly 10% lower for the organic systems combined, despite the yield gap of 27%. We found that besides N input, management induced soil quality properties drive differences in N2O emissions between...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions.
Ano: 2019
URL: http://orgprints.org/36205/1/Beitrag_278_final_a.pdf

Leaflet "Earthworms-architects of fertile soils"
Provedor de dados: Organic Eprints
Autores: Richter, Toralf; Kravchenko, Anatoliy; Rudiuk, Anatoliy.
This publication highlights the importance of earthworms in improving soil fertility, including their general characteristics, as well as the impact of soil cultivation, crop rotation and fertilization on the population density of earthworms.
Tipo: Working paper
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2016
URL: http://orgprints.org/33039/1/Earthworms-Architects_of_fertile_soils_UA.pdf

Nyt redskab på vej til radrensning i efterafgrøder med stubrester
Provedor de dados: Organic Eprints
Autores: Green, Ole; Znova, Liubava; Nielsen, Erling E.
I forskningsprojektet RowCrop er forskere fra Aarhus Universitet sammen med virksomheden AGRONINTELLI i gang med at udvikle redskaber til et nyt dyrkningssystem med plantevækst på marken året rundt. Sådan et system har mange fordele, men stiller også nye krav til dyrkningsteknik og markredskaber, hvis det skal kunne bruges af økologer, som ikke har mulighed for at benytte sig af ukrudtssprøjtning. Plantedække året rundt kan først og fremmest forebygge udvaskning af næringsstoffer og erosion og sikre en bedre jordstruktur, men et sådant dyrkningssystem kræver, at man etablerer en efterafgrøde i forbindelse med rækkerensning i hovedafgrøden. Den metode er velkendt, men mekanisk rensning af efterafgrøden i hovedafgrødens stub er en udfordring
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2016
URL: http://orgprints.org/29979/1/%C3%98E%20586%20-%20Mark.pdf

Einfluss der Zugabe von Rohphosphat in den Biogasfermenter auf die Düngewirkung fermentierter Rindergülle [Influence of adding phosphate to the biogas fermenter on the fertilization effect of fermented liquid cattle manure]
Provedor de dados: Organic Eprints
Autores: Möller, Kurt.
Durch die Vergärung von Gülle wird eine deutlich stärkere ertragssteigernde Direktwirkung von Gülle erzielt. Die Nachwirkung war nach zwei Schnitten vergleichbar hoch. Die Verfügbarkeit von N und P steigt mit der Vergärung proportional zueinander. Ein Aufschluss von Rohphosphaten durch die Fermentation konnte nicht erzielt werden. Die Zugabe von leicht abbaubarem organischem Material führte zu keiner höheren Verfügbarkeit von N und P aus dem Grundsubstrat Gülle bzw. aus den zugeführten Rohphosphaten.
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/1002/1/moeller%2D2003%2Dbiogasguelle%2Drohphosphat.pdf

Catch crop strategy and nitrate leaching following a grazed grass-clover
Provedor de dados: Organic Eprints
Autores: Hansen, E.M.; Eriksen, J.; Vinther, F.P.
The objective of the study was to prevent the accumulation of high concentrations of mineral N in the soil during the drainage season by growing the presumably most effective catch crop, Italian ryegrass, undersown in barley as a green crop for silage on sandy soil. Further more, to examine the effect on two fields with different management of the grass-clover ley and therefore a different mineralization potential after ploughing. The green barley/Italian ryegrass treatment was compared with barley grown to maturity with and without an undersown conventional catch crop of perennial ryegrass.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2007
URL: http://orgprints.org/10621/1/10621.doc

N availability after long-term organic farming in irrigated and rain-fed Mediterranean semi-arid grassy crops
Provedor de dados: Organic Eprints
Autores: Romanyà, Joan; Rovira, Pere.
The use of manures and rotation with legumes in organic farming systems does not always guarantee the adequate nutrient supply to crops. We studied post-harvest N availability in a series of Mediterranean semi-arid rain-fed and irrigated organic fields after 18 years of conversion and compared these with conventional fields nearby. In organic irrigated soils the use of legumes and the application of moderate amounts of manures resulted in higher amounts of soil organic C and potentially mineralisable N. In contrast, in organic rain-fed soils that did not incorporate legumes in their rotation and used low amounts of manures, soil organic C and potential mineralisable N were lower. In organic irrigated soils changes in organic matter quality resulted in a...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/11487/3/Romanya_11487_ed.doc

Rodsystemer hos rødbede, sukkermajs og knoldselleri efter grøngødning
Provedor de dados: Organic Eprints
Autores: Christiansen, Julie S.; Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
Større viden om grønsagers rodvækst vil kunne øge kvælstofudnyttelsen ved økologisk dyrkning. Derfor er rodsystemerne hos rødbede, sukkermajs og knoldselleri blevet undersøgt ved Danmarks JordbrugsForskning i Årslev.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Soil biology; Farm nutrient management; Air and water emissions.
Ano: 2003
URL: http://orgprints.org/7912/1/7912.doc

Fosfaat uitmijnen op natuurpercelen met gras/klaver en kalibemesting: Handreiking voor de praktijk
Provedor de dados: Organic Eprints
Autores: Timmermans, B.G.H.; Eekeren, N. van; Bos, M.
Veel Nederlandse bodems zijn rijk aan fosfaat. Dit staat de ontwikkeling van interessante natuur in de weg. Omdat fosfaat niet uitspoelingsgevoelig is, zijn andere methoden nodig om de bodem fosfaat armer te krijgen. Dit kan door het maaien en afvoeren van gras-klaver. Deze teelt vraagt wel om kalibemesting. De combinatie van gras-klaverteelt met kalibemesting is een geschikte methode voor uitmijnen. Het Louis Bolk Instituut en DLV hebben deze methode samen met melkveehouders in Noord-Brabant getest. De positieve ervaringen en resultaten van de metingen zijn gebundeld in deze brochure.
Tipo: Book
Palavras-chave: Nutrient turnover.
Ano: 2010
URL: http://orgprints.org/18098/1/2402_.pdf

The NDICEA model: a supporting tool for nitrogen management in arable farming
Provedor de dados: Organic Eprints
Autores: van der Burgt, Ir. G.J.H.M.; Timmermans, Dr. B.G.H.
Nitrogen use efficiency is an important item in organic farming. Modelling nitrogen dynamics can help to understand the impact of alternative agronomic practices and thus assist in decision making. In three examples in the Netherlands, the role of the NDICEA model is demonstrated. It is concluded that NDICEA is an easy to use and helpful tool for optimizing nitrogen efficiency and minimizing losses.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2009
URL: http://orgprints.org/15860/1/The_NDICEA_model.pdf

Modeling dissolved organic matter mobilization and immobilization in the root zone: Effect of soil treatment on denitrification and N leaching
Provedor de dados: Organic Eprints
Autores: Gjettermann, Birgitte.
This report summarizes the technical description of a code/model concept simulating mobilization and immobilization of dissolved organic matter (DOM) in the Daisy model. This report also describes the simulated effects of duration of grass-clover, time of soil ploughing, and catch crops on denitrification and N leaching.
Tipo: Report
Palavras-chave: Nutrient turnover; "Organics" in general.
Ano: 2005
URL: http://orgprints.org/5387/1/5387.pdf

The development of improved guidance on the use of fertility building crops in organic farming (CTE0204)
Provedor de dados: Organic Eprints
Fertility building crops are a key component of organic rotations where they help to provide nitrogen required for optimal crop performance. It is important that rotations and managements are planned which optimise the capture and use of this nitrogen. Some estimates are available of the nitrogen production from fertility building crops, but there was a need to produce a more comprehensive assessment of likely nitrogen fixation, release and availability under different circumstances. Thus the overall aim of the study was to provide guidelines to enable organic farmers to better estimate the nitrogen supply to a rotation following fertility building crops. This was done by a mix of literature review, empirical measurements, model development and farmer...
Tipo: Report
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Technology transfer.
Ano: 2006
URL: http://orgprints.org/6751/1/Document.aspx?Document=of0316_6043_FRP.pdf

Standardisierung eines Kressetestes für das  biologischdynamische Hornmistpräparat
Provedor de dados: Organic Eprints
Autores: Morau, A.; Fritz, Jürgen.
The biodynamic preparations have been investigated mainly in field trials. By contrast long-term project is to establish a rapid bioassay to evaluate the effectiveness of the  horn manure preparation (HMP). The investigated bioassay is based on hydroponically grown cress (Lepidium sativum L.) as an indicator plant. Past results indicated its sensitivity for typical dilutions of HMP in agricultural practice. However one limiting point was the use of non-standard local well water as hydroponic solution. The aim of the present study was to standardise this parameter. A series of 8  experiments was conducted to compare a selected mineral water with well water. The results indicate a highly significant (p&lt;0,001) effect of the HMP on the root´s length  was...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31862/1/Standardisierung%20eines%20Kressetestes%20f%C3%BCr%20das%20biologischdynamische.pdf

Potential loss of nutrients from different rearing strategies for fattening pigs on pasture
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Hermansen, J.E.; Strudsholm, K.; Kristensen, K.
Nutrient load and distribution on pasture were investigated with fattening pigs that: 1) spend a proportion of or their entire life on pasture, 2) were fed either restrictively or ad libitum, and 3) were weaned at different times of the year. The N and P retention in pigs decreased the longer they were kept on pasture. The contents of soil inorganic N and exchangeable K were significantly raised compared to the soil outside the enclosures but with no differences between treatments. Pig grazing did not affect extractable soil P. Regular moving of huts, feeding and water troughs was effective in ensuring that nutrients were more evenly distributed on the paddocks. Grass cover, as determined by spectral reflectance, was not related to the experimental...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Pigs; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/10041/1/10041.pdf

Tillage in the growing season is ineffective as a tool of increased soil N mineralization
Provedor de dados: Organic Eprints
Autores: Thomsen, Ingrid Kaag; Sørensen, Peter.
Soil tillage serves a number of purposes such as control of weeds, incorporation of crop residues and manures, and maintenance or improvement of soil mechanical properties, including seedbed preparations. As a side-effect, soil tillage may affect turnover of organic matter (OM) by changing the particle size and spatial distribution of crop and manure residues in soil and by increasing the intimacy of residue/soil contacts. By breaking soil structural elements, tillage may contribute further to N mineralization by exposing physically protected organic matter to microbial turnover. Therefore, adjusting the time, intensity and frequency of soil tillage operations may enable optimization of synchrony, defined as the matching through time of N availability and...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/4579/1/4579.PDF

SimDen – A simple empirical model for quantification of N2O emission and denitrification
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
The denitrification process, including emission of nitrous oxide (N2O), is an important process both from an agricultural and environmental point of view. However, the process is, due to its high spatial and temporal variability, very difficult and resource demanding to quantify, and the only alternative is often to use simulation models. However, simulation models often need more input information than what is available. Therefore, a simple empirical model - SimDen - for quantifying the denitrification is presented, where only information about soil type and fertilisation are needed as input variables.  Basically, the denitrification in SimDen is calculated as (N2O-emission) x (N2/N2O-ratio):   - The N2O-emission is derived from input of N and emission...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2005
URL: http://orgprints.org/5759/1/5759.pdf

Estimating bioavailable reserves and potential leaching of soil P by simple chemical tests
Provedor de dados: Organic Eprints
Autores: Saarela, Into.
The amounts of P extracted with acid ammonium acetate are significantly correlated with the bioavailable P reserves of Finnish soils. Together with clay percentage the simple extraction method is fairly reliable. In routine soil testing clay% can be estimated visually. Additional improvement in accuracy is possible by extraction with a strong acid. Leaching losses of P are also significantly correlated with acetate-extractable soil P, but the concentration of dissolved phosphate at a certain soil test P value varies with other soil properties and increases with decreasing pH.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/15044/1/njffosfor.pdf

Tillage System Comparison in Organic Farming: Effects on N  Mineralization, Soil Microbial Biomass, and Yield
Provedor de dados: Organic Eprints
Autores: Grosse, Meike; Haase, Thorsten; Heß, Jürgen.
The nitrogen supply can be a yield-limiting factor in organic farming, especially when reduced tillage is applied. An organic field experiment was conducted from 2007 to 2013 to analyse the potential of the nitrogen supply through the efficient use of green manure crops in different tillage systems. Three farming systems were compared: a stubble cleaner system (SC) and a plough system (PL), both in a cereal-based crop rotation, and another plough system in a crop rotation that included alfalfa grass ley (PLALF). In the fifth year of the experiment, the experimental design was extended into a split plot design, and seven green manure treatments (Lolium perenne, Phacelia tanacetifolia, Sinapis alba, a mixture of Sinapis alba and Trifolium resupinatum,...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil tillage.
Ano: 2019
URL: http://orgprints.org/36471/1/of-5.1.23.pdf

Karbondynamikk i landbruksjord
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun; Serikstad, Grete Lene; Hansen, Sissel.
Karbon tilføres jorda via planterøtter og i form av husdyrgjødsel og annet organisk materiale. Det er krevende å øke innholdet av karbon i dyrket jord. Hovedgrunnen er at mye karbon fjernes fra jorda via avlinger som gras, korn og grønnsaker. Karbonholdige molekyler er også ettertraktede energikilder og byggeråstoff for jordorganismene i eng- og åkerjord, og avgjørende for næringsfrigjøring i jord. Bare en liten andel av karbonet som tilføres jorda vil vanligvis være der etter noen år. Klima, driftsmåte, jord-egenskaper, planterøtter, mikroorganismer og meitemark påvirker karbonets skjebne i matjordlaget. Det er ennå mye vi ikke vet.
Tipo: Report
Palavras-chave: Soil biology; Nutrient turnover; Air and water emissions; Biodiversity and ecosystem services; Environmental aspects.
Ano: 2019
URL: http://orgprints.org/34476/1/Karbondynamikk%20i%20landbruksjord%20endelig%20i%20NORS%C3%98K%20faginfo%20ISBN.pdf

Estimated N leaching losses for organic and conventional farming in Denmark
Provedor de dados: Organic Eprints
Autores: Knudsen, Marie Trydeman; Kristensen, Ib Sillebak; Berntsen, Jørgen; Petersen, Bjørn Molt; Kristensen, Erik Steen.
The impact of organic compared to conventional farming practices on N leaching loss was studied for Danish mixed dairy and arable farms using an N balance approach based on representative data. On mixed dairy farms a simple N balance method was used to estimate N surplus and N leaching loss. On arable farms the simple N balance method was unreliable due to changes in the soil N pool. Consequently, the FASSET simulation model was used to estimate N surplus, N leaching loss and the changes in the soil N pool.   The study found a lower N leaching loss from organic than conventional mixed dairy farms, primarily due to lower N inputs. On organic arable farms the soil N pool was increasing over years but the N leaching loss was comparable to conventional arable...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farming Systems; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/4637/1/4637.pdf

Nährstoffversorgung im Biogemüsebau
Provedor de dados: Organic Eprints
Autores: Lichtenhahn, Martin; Berner, Alfred; Van der Berge, Paul.
Das Merkblatt beschreibt neben den Grundsätzen der Nährstoffversorgung Potenzial und Einsatzmöglichkeiten der wichtigsten Nährstoffquellen und zeigt den Einfluss von Kulturmassnahmen auf. Ein Leitfaden zur Berechnung von Düngergaben rundet die Broschüre ab.Die gedruckte Version des Merkblattes ist derzeit vergriffen.
Tipo: Book
Palavras-chave: Nutrient turnover; Vegetables.
Ano: 1998
URL: http://orgprints.org/25419/1/1082-naehrstoffe.pdf

Überprüfung und Anpassung von Bilanzierungsmodellen für Humus an Hand von Langzeitversuchen des Ackerlandes
Provedor de dados: Organic Eprints
Autores: Kolbe, Dr. Hartmut; Prutzer, Dipl. Ing. agr. Ina.
Verschiedene Modelle der Humusreproduktion wurden auf ihre Genauigkeit und Praxistauglichkeit hin untersucht. Hierfür wurde der Entwurf des VDLUFA zur Humusbilanzierung sowie ein Modell zur Dynamik des Kohlenstoffumsates im Boden ausgewählt. Von den Simulationsmodellen wurde das Modell CANDY-Carbon Balance (CCB) ausgewählt. Von dem VDLUFA wurde eine Methode vorgeschlagen, die aus der HE-Methode (Humus Einheit) sowie der Erweiterung für den ökologischen Landbau (ÖKO-Methode) und der ROS-Methode (Reproduktionswirksame Organische Substanz) entwickelt worden ist. Die Überprüfung der Verfahren erfolgte an Hand von Ergebnissen aus Dauerversuchen mit Fragestellungen des konventionellen und ökologischen Landbaus. Bei der Beurteilung der Verfahren ist neben der...
Tipo: Report
Palavras-chave: Nutrient turnover; Soil quality; Crop husbandry.
Ano: 2004
URL: http://orgprints.org/3130/2/Humus%2DEndbericht_Internet.pdf

Catch Crops in Organic Farming Systems without Livestock Husbandry - Simulations with the DAISY model
Provedor de dados: Organic Eprints
Autores: Müller, Torsten; Thorup-Kristensen, Kristian; Magid, Jakob; Jensen, Lars Stoumann; Hansen, Søren.
This paper presents simulations of the soil-plant-atmosphere model DAISY based on an organic crop rotation with incorporation of different catch crops following pea as a leguminous cash crop. Special emphasise was put on the simulation of N-mineralisation/-immobilisation and of soil microbial biomass N. The DAISY model was able to simulate soil mineral N and soil microbial biomass N after soil incorporation of catch crop plant residues to some extend. Several processes need further attention and may be integrated into the DAISY model: (1) soil tillage induced mobilisation of organic material including considerable amounts of organic N, (2) winter killing of sensitive plant species and varieties, (3) decomposition of plant residues at the soil surface as...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Production systems; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/7886/2/7886.pdf

Mikroberne spiser gerne op
Provedor de dados: Organic Eprints
Autores: Andersen, Morten.
Fremtidens restmaterialer fra produktion af bioethanol kan måske anvendes som plantegødning i marken og gøre produktionen af bioethanol mere bæredygtig. Forsøg viser, at tilbageførsel af sådanne restprodukter ikke skader jordens mikrobielle diversitet og funktion på kort sigt.
Tipo: Other
Palavras-chave: Nutrient turnover; Environmental aspects; Farm nutrient management; Soil biology; Composting and manuring.
Ano: 2009
URL: http://orgprints.org/16875/1/16875.pdf

Turnover of organic matter in differently textured soils. I. Physical characteristics of structurally disturbed and intact soils
Provedor de dados: Organic Eprints
Autores: Schjønning, P.; Thomsen, I.K.; Møberg, J.P.; de Jonge, H.; Kristensen, K.; B.T., Christensen.
Soil type effects on organic matter turnover are most often ascribed directly to differences in soil clay content. Since soil texture determines the physical characteristics of soil, aggregation and water holding capacity may be more relevant to address in the search for controls of organic matter turnover. Most studies of microbial processes in soils are based on structurally disturbed soil, where the abiotic conditions for the microbial activity may be quite different from those in intact soils. In this study, basic physical characteristics were determined for structurally disturbed and intact soil samples from differently textured soils. Bulk soil was retrieved from 0–20 cm depth at six locations along a textural gradient in an arable field on...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality; Soil biology.
Ano: 1999
URL: http://orgprints.org/726/1/geoderma_99_I.pdf

Fusarium in wheat. Effects of soil fertility strategies and nitrogen levels on mycotoxins and seedling blight.
Provedor de dados: Organic Eprints
Autores: van der Burgt, Ir. G.J.H.M.; Timmermans, Dr. B.G.H.
In a two-year field experiment in the Netherlands the relation between three soil fertility strategies, additional nitrogen levels and Fusarium Head Blight in wheat are explored. There was a substantial year-effect, as could be expected. The soil fertility strategies showed differences, but were party coinciding with location. Although not consistent over the years and strategies, a significant relation was found between additional nitrogen applications around anthesis and FHB, expressed as presence of mycotoxines (DON) and Total Root Rot from the Blotter test. Higher nitrogen levels from fertilizer applications at anthesis give a higher chance on FHB, with other so far unknown factors playing a role.
Tipo: Report
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2009
URL: http://orgprints.org/15859/1/Fusarium_in_wheat.pdf

Copper, molybdenum and cobalt in herbage and ruminants from organic farms in Norway
Provedor de dados: Organic Eprints
Autores: Govasmark, Espen; Steen, Arvid; Bakken, Anne Kjersti; Strøm, Turid; Hansen, Sissel; Bernhoft, Aksel.
To evaluate the animal nutritional status of copper, molybdenum and cobalt on Norwegian organic farms, soil, herbage and animal blood samples were collected from 27 dairy and sheep farms and analysed for Cu, Mo and Co. The herbage median (10th-90th percentile) Cu, Mo, and Co concentrations (mg/kg DM) and the Cu:Mo ratio in the first cut were 5.3 (3.9-6.8), 1.5 (0.6-4.8), &lt;0.05 (&lt;0.05-0.08) and 3.8 (1.1-8.3) and in the second cut 7.0 (5.7-9.3), 3.3 (1.6-10.1), 0.06 (&lt;0.05-0.15) and 2.0 (0.8-5.2), respectively. The results of mixed model analyses of herbage Cu and Mo indicated that soil pH, soil organic matter content, herbage botanical composition, yield and phenological stage of timothy at harvest mostly influenced the herbage micronutrient...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farm nutrient management; Feeding and growth.
Ano: 2005
URL: http://orgprints.org/6921/1/CuMoCo_artikkel.pdf

Soil nutrient levels define herbage yield but not root biomass in a multispecies grass-legume ley
Provedor de dados: Organic Eprints
Autores: Cong, W.-F.; Christensen, B.T.; Eriksen, J.
The response of above- and below-ground biomass to soil nutrient availability is crucial for estimating belowground carbon input and predicting changes in soil carbon storage. However, the response is far from clear at plant community level, especially for grassland systems. Using a long-term field experiment initiated 123 years ago with varying soil nutrient levels (deficient, sub-optimal, optimal and over-optimal) established by use of two nutrient sources (animal manure or mineral fertiliser), we examined the effects of soil nutrient level and source on herbage yield and composition, root biomass and root-to-shoot (R/S) ratio of an unfertilised multispecies grass-legume ley. Increased nutrient levels enhanced herbage yield, but did not affect root...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/34981/1/Cong%20et%20al.%202019%20AGEE.pdf

Nitrogen mineralization and greenhouse gas emissions after soil incorporation of ensiled and composted grass-clover as green manure
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Sørensen, Peter; Petersen, Søren O.; Ambus, Per.
This 3-month incubation study showed that ensiled grass-clover was a better nitrogen (N) source than a composted grass-clover and straw mix (grass-clover:straw, 4:1, w:w), owing to the high content of labile compounds compared to the more degraded compost. Our study also indicated that emissions of the strong greenhouse gas nitrous oxide (N2O) can be reduced by incorporating green manure using harrowing instead of ploughing. The silage-derived N release by the end of the incubation was equivalent to 38-42 kg N ha-1, which corresponded to one third of the N applied in silage, with no difference between ploughing and harrowing. In contrast, no net release of mineral N was detected from the composted grass-clover.
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover; Air and water emissions.
Ano: 2013
URL: http://orgprints.org/24520/1/24520.pdf

Klimawirkungen und Nachhaltigkeit ökologischer Betriebssysteme - Untersuchungen in einem Netzwerk von Pilotbetrieben
Provedor de dados: Organic Eprints
Das hier beschriebene Projekt ist Teil eines Verbundvorhabens, das folgende Teilprojekte umfasst: FKZ 06OE160, FKZ 06OE353.  Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/cgi/saved_search?savedsearchid=1250.  Für die gesamte Bio-Branche, die Verbraucher und die Agrar-Umweltpolitik ist es wichtig zu wissen, wie klimafreundlich Betriebe des Ökologischen Landbaus wirtschaften, welche flächen- und produktbezogenen Treibhausgasemissionen auftreten und wie noch bestehende Optimierungspotenziale genutzt werden können. Während für einzelne landwirtschaftliche Teilprozesse Modelle und Analysetools zur Verfügung stehen, fehlen bisher geeignete Methoden...
Tipo: Project description
Palavras-chave: Nutrient turnover; Dairy cattle; Technology transfer; Biodiversity and ecosystem services; Air and water emissions.
Ano: 2023
URL: http://orgprints.org/16944/1/TUM_06OE160.doc

THE EFFECT OF TWO DIFFERENT ROTATION SYSTEMS ON SOIL ORGANIC MATTER IN ORGANIC FORAGE CULTIVATION
Provedor de dados: Organic Eprints
Autores: Erdal, Ulfet; çelen, Ahmet Esen.
Crop rotation has a key role in improving the soil and increasing the yield. Crop rotation with legumes, recycling of crop residues and the application of organic manure  must form the basis of nutrient management in organic farming. Presence of legumes in rotation may serve as the primary source of nitrogen for subsequent crops. Most deficiencies in the soil are directly linked to low organic matter content.  Organic matter has a very crucial significance for soil fertility improvement. The aim of this study was to determine the effects of some plants used in animal feeding on soil organic matter (SOM). For this purpose some certain plants have been selected and tested in two different rotation systems. This study was carried out in Menemen Plain, in...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32399/1/AGROSYM%20UTAEM%20POSTER%20%282%29-%20ulfet%20erdal.ppt

Nitrogen leaching following cultivation of grazed grass-clover on coarse sandy soil
Provedor de dados: Organic Eprints
Autores: Hansen, E.M.; Eriksen, J.; Vinther, F.P.
Nitrogen leaching following cultivation of grazed grass-clover on coarse sandy soil    Background and objectives  When grass-clover is ploughed there is a high risk of nitrogen leaching. The objective of this study was to measure the effectiveness of an early catch crop in reducing nitrogen leaching from coarse sandy soil. Barley as a green crop for silage was undersown with Italian ryegrass in spring and harvested at the beginning of early heading, and the Italian ryegrass was subsequently used for roughage production in autumn.     Material and methods  Experiments were established in spring 2003 on a commercial organic farm with a coarse sandy soil. Two fields with grass-clover were ploughed. One field, a 3-year-old grass-clover, had formed part of a...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/5476/2/5476.pdf

Ringning af søer påvirker græsdække og potentiale for næringsstoftab
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Ringning af søer er et kompromis i forhold til de økologiske principper om at tilgodese dyrenes adfærdsmæssige behov. Resultaterne viser, at selvom ringning har en positiv miljøeffekt, så er der andre forhold som er mindst ligeså vigtige for potentialet for tab af næringsstoffer.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Pigs; Air and water emissions.
Ano: 2005
URL: http://orgprints.org/10048/1/10048.doc

Effect of different management strategies on soil quality  of citrus orchards in Southern Italy
Provedor de dados: Organic Eprints
Autores: Canali, Stefano; Emanuela, Di Bartolomeo; Alessandra, Trinchera; Luigi, Nisini; Fabio, Tittarelli; Francesco, Intrigliolo; Giancarlo, Roccuzzo; Maria Luisa, Calabretta.
Twenty-six soil samples were collected from 13 paired orchards (organically vs. conventionally managed)  homogeneous for age, rootstock and cultivars, belonging to the Eastern Sicily Organic Citrus  farm Network. The soil quality was evaluated by chemical and biochemical indicators. The total  organic C, humification parameters and isoelectric focusing of extracted organic matter were measured  to quantify the size of relevant soil C pools. In addition, C turnover was evaluated by determining  microbial C mineralization, C microbial biomass and by calculating the mineralization and metabolic  quotient (qCO2). The results obtained demonstrated that organic citrus soils were characterized by a  general increase in all the organic matter pools, which means a...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Farm nutrient management.
Ano: 2009
URL: http://orgprints.org/28208/1/Soil%20Use%20and%20Management%20_%20survey%20of%20citrus%20orchards.pdf

Matjordas økosystem
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun; Swensen, Berit.
The ecosystem of farmed soil
Tipo: Working paper
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Buildings and machinery; Knowledge management.
Ano: 2016
URL: http://orgprints.org/30083/1/Matjordas%20%C3%B8kosystem%20INFO%20ferdig%20m%20ISBN%20m%20logo.pdf

Catch Crop Residues Stimulate N2O Emissions During Spring, Without Affecting the Genetic Potential for Nitrite and N2O Reduction
Provedor de dados: Organic Eprints
Autores: Duan, Yun-Feng; Hallin, Sara; Jones, Christopher M.; Priemé, Anders; Labouriau, Rodrigo; Petersen, Søren O.
Organic agriculture depends on recycling of N to sustain crop production, and the use of catch crops to prevent leaching losses during winter is part of this strategy. The finding in this study, that catch crop residues were a more consistent source of nitrous oxide emissions in spring than synthetic fertiliser, indicates catch crop residue decomposition may contribute negatively to the climate impact of the farming system. Management practices are needed that reduce the potential for denitrification, which is the main source of nitrous oxide. Possible strategies include cultivation to promote aerobic rather than anaerobic degradation, and timing of manure application to avoid that mineral N from manure accumulates during residue decomposition....
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Soil biology; Nutrient turnover; Air and water emissions.
Ano: 2018
URL: http://orgprints.org/36654/1/fmicb_09_02629.pdf

Vergleichende Bewertung der N-Versorgung von Kartoffeln im Ökologischen Landbau mittels Blatt- und Stängelsaftanalyse
Provedor de dados: Organic Eprints
Autores: Dresow, Jana F.; Böhm, Herwart.
Für die Ertragsbildung von Kartoffeln ist die N-Versorgung von herausragender Bedeutung. Im Ökologischen Landbau erfolgt diese überwiegend indirekt über den Anbau von Leguminosen sowie ergänzend durch den Einsatz organischer Dünger pflanzlicher oder tierischer Herkunft. Eine kurzfristige Steuerung der N-Versorgung während der Vegetationsperiode ist bei Anwendung dieser N-Quellen nicht möglich, dennoch ist der Einsatz von kostengünstigen Schnellmethoden zur Überprüfung der N-Versorgung im ökologischen Kartoffelbau als ergänzendes Instrument in der Beratung zur Ableitung von Anbauempfehlungen von Interesse. Im Folgenden werden Ergebnisse zweier Methoden – Stängelsaft- und Blattanalyse – vorgestellt und verglichen sowie ihre Relevanz für den Ökologischen...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Root crops.
Ano: 2010
URL: http://orgprints.org/29612/1/PflaTag2010_Dresow_B%C3%B6hm_N-Versorgung.pdf

Can Organic Farming Contribute to Carbon Sequestration? A Survey in a Pear Orchard in Emilia-Romagna Region, Italy
Provedor de dados: Organic Eprints
Autores: Ciavatta, C.; Gioacchini, P.; Montecchio, D.
The effect of organic fertilisation on the level of total organic carbon (TOC) in an 18-years old pear orchard (cv. Abate Fetel) was evaluated vs. a conventional pear orchard mineral fertilized (control). In both orchards soil samples (Typic Udochrept loamy soil) were taken at two depths (0-15 and 30-50 cm) along the row (tilled and mainly amended with compost) and in the inter-row space (grassed with different Graminaceae species in the organic orchard, bare in the conventional orchard).  The area (elevation 20 m), located in Bologna province, Emilia-Romagna Region (Italy), is characterised by mean annual temperature 13.1 °C and rainfall around 750 mm.  In the horizon 0-15 cm of the row an increase of about 14 tons ha-1 of TOC has been calculated after...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/12101/1/Ciavatta__12101_ed.doc

Reduzierte Bodenbearbeitung im Dauerfeldversuch Gladbacherhof - Einfluss auf Erträge und Bodenparameter in der 3. Rotation
Provedor de dados: Organic Eprints
Autores: Schulz, Franz; Knebl, Lucas; Gattinger, Andreas.
Auf dem Lehr- und Versuchsbetrieb Gladbacherhof der Universität Gießen wird seit 1998 ein zweifaktorieller Dauerfeldversuch durchgeführt. Es werden die Effekte verschiedener Betriebssysteme (mit und ohne Viehhaltung) und unterschiedliche Systeme der Bodenbearbeitung (konventioneller tief wendender Pflug, Zweischichtenpflug, flach wendender Pflug, pfluglos) untersucht. Die Untersuchungsparameter betreffen die Pflanzen, den Boden und die Umwelt. In diesem Artikel werden die Ergebnisse der Erträge und verschiedener Bodenparameter in der 3. Rotation 2010-2015 hinsichtlich der Bodenbearbeitung präsentiert. Zusammenfassend kann man festhalten: Mit den Systemen der reduzierten Bodenbarbeitung, die den Pflug mit einschließen, konnten vergleichbare...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil tillage.
Ano: 2019
URL: http://orgprints.org/36216/1/Beitrag_292_final_a.pdf

Eftervirkning af kløvergræs
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/233/1/Abstract_J%C3%B8rgen_Eriksen.doc

Einsatz und Bedeutung organischer Handelsdünger im ökologischen Gemüsebau
Provedor de dados: Organic Eprints
Autores: Hornischer, Uwe.
Der Einsatz organischer Handelsdünger wird dargestellt, die Umsetzung und Ausnutzung wird diskutiert, Beispiele aus der Düngungspraxis werden beschrieben.
Tipo: Book chapter
Palavras-chave: Nutrient turnover; Vegetables; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/8350/1/S_444_titelei_komplett.indd.pdf

Natuurherstel in grasland door klaver en kalibemesting
Provedor de dados: Organic Eprints
Autores: van Eekeren, Nick; Iepema, Goaitske; Smeding, Frans.
Hoge fosfaatgehalten in bodems van voormalige landbouwgronden staan een snelle natuurontwikkeling in de weg. Het huidige verschralingsbeheer leidt op korte termijn niet tot de gewenste fosfaatverschraling. Het Overlegplatform Duinboeren en het Louis Bolk Instituut hebben in samenwerking met Vereniging Natuurmonumenten de mogelijkheden van ‘uitmijnen’ getoetst door middel van de biologische teelt van grasklaver in het natuurontwikkelingsgebied het Hengstven.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Biodiversity and ecosystem services.
Ano: 2007
URL: http://orgprints.org/10434/1/1874.pdf

Contribution of nitrification and denitrification to N2O emissions from urine patches
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.
Urine deposition by grazing livestock causes an immediate increase in nitrous oxide (N2O) emissions, but the responsible mechanisms are not well understood. A nitrogen-15 (15N) labelling study was conducted in an organic grass-clover sward to examine the initial effect of urine on the rates and N2O loss ratio of nitrification (i.e. moles of N2O-N produced per moles of nitrate produced) and denitrification (i.e. moles of N2O produced per moles of N2O + N2 produced). The effect of artificial urine (52.9 g N m-2) and ammonium solution (52.9 g N m-2) was examined in separate experiments at 45 and 35% water-filled pore space (WFPS), respectively, and in each experiment a water control was included. The N2O loss derived from nitrification or denitrification was...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions; Composting and manuring.
Ano: 2007
URL: http://orgprints.org/14150/1/14150.pdf

To what extent does organic farming rely on nutrient inflows from conventional farming?
Provedor de dados: Organic Eprints
Autores: Nowak, B.; Nesme, T.; David, Christophe; Pellerin, S.
Nutrient management is a critical factor for organic farming. European organic regulations ban the use of artificial fertilisers. However organic farms may import nutrients coming from conventional farming. In this study we quantified the magnitude of nitrogen (N), phosphorus (P) and potassium (K) inflows from conventional farming to organic farming for 63 organic farms located in three French agricultural districts characterized by their degree of specialisation (crop productions, animal productions or both). Inflows from conventional farming amounted to 23%, 73% and 53% for N, P and K, respectively. These inflows were strongly correlated with farm production systems and positively correlated with the fertilisor demand of the farms.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil.
Ano: 2013
URL: http://orgprints.org/26327/1/Nowak_2013_CIAG_Vol32.pdf

Short-term effects of tillage on mineralization of nitrogen and carbon in soil
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne L.; Debosz, Kasia; McCarty, Greg W.
Tillage is known to decrease soil organic nitrogen (N) and carbon (C) pools with negative consequences for soil quality. This decrease is thought partly to be caused by exposure of protected organic matter to microbial degradation by the disturbance of soil structure. Little is known, however, about the short-term effects of tillage on mineralization of N and C, and microbial activity. We studied the short-term effects of two types of tillage (conventional plough- and a non-inverting-tillage) on mineralization and microbial N and C pools in a sandy loam under organic plough-tillage management. The release of active and protected (inactive) N by tillage was further studied in the laboratory by use of 15N labelling of the active pool of soil N followed by...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality; Soil biology.
Ano: 2003
URL: http://orgprints.org/1537/1/Shortterm.pdf

Spildevandsslam er et oplagt gødningsprodukt på økologiske bedrifter!
Provedor de dados: Organic Eprints
Autores: Blume, Steffen.
Det skønnes, at der produceres ca. 900.000 ton spildevandsslam/år. 77% af dansk spildevandsslam benyttes i dag som gødning. Danmark har nogle af verdens skrappeste regler for spildevandsslam. Myndigheder og forskere følger udviklingen af spildevandsslam tæt. Spildevandsslam indeholder    store mængder fosfor. Regeringens Ressourcestrategi ønsker spildevandsslam tilbage på markerne som gødning.
Tipo: Report chapter
Palavras-chave: Composting and manuring; Nutrient turnover; Farm nutrient management.
Ano: 2013
URL: http://orgprints.org/27054/6/27054.pdf

Elm Farm Research Centre: Wakelyns Agroforestry (experimental farm)
Provedor de dados: Organic Eprints
Wakelyns Agroforestry – 24 ha organic farm in eastern England.  Stockless mixed cropping agroforestry system.  Office and meeting facilities. Site for much of EFRC research.
Tipo: Research facility description
Palavras-chave: Nutrient turnover; Farming Systems; Biodiversity and ecosystem services.
Ano: 2023

Functional Compost
Provedor de dados: Organic Eprints
Autores: Luxhøi, Jesper; Brøgger, Morten; Knudsen, Inge M.B.; Poulsen, Pernille H.B.; Møller, Jacob; Jensen, Birgit; Jensen, Dan F.; Magid, Jakob.
The aim of the research program Functional Compost is to develop and test compost, which have been enriched with chitin, for plant growth promoting properties and to recognise specific mechanisms. Two types of compost were included in the program: source separated biodegradable municipal solid waste compost (DM = 62 %) and garden and park waste compost (DM = 66 %). Chitin was added in trace amounts during the maturity phase, combined with two levels of trace amounts immediately before adding the compost to the growth medium. The research program includes several parallel experiments. In experiment I, compost (20 vol. %) was added to soil (no plants) and incubated at 15 C for 5 month, under regular determination of microbial respiration and gross and net N...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology; Soil quality.
Ano: 2006
URL: http://orgprints.org/9214/1/9214.pdf

Auswirkungen unterschiedlicher Düngungssysteme im ökologischen Ackerbau auf Nährstoff- und Humusbilanzen
Provedor de dados: Organic Eprints
Autores: Surböck, Andreas; Heinzinger, Markus; Schmid, Harald; Friedel, Jürgen K.; Freyer, Bernhard.
Im Rahmen einer Langzeituntersuchung (Projekt MUBIL) auf einem ökologisch bewirtschafteten Markttfruchtbetrieb werden ausgehend von einer einheitlichen Fruchtfolge drei organische Düngungssysteme untersucht. Ihre Nachhaltigkeit wurde über die Berechnung ihrer Humus- und Nährstoffbilanzsalden beurteilt.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2012
URL: http://orgprints.org/28574/1/Surb%C3%B6ck%20et%20al_GPW_Berlin_2012.pdf

Assessment of Alternative Phosphorus Fertilizers for Organic Farming: Meat and Bone Meal
Provedor de dados: Organic Eprints
Autores: Möller, Kurt.
In the past meat and bone meal was a major source of nutrients for recycling back to agricultural land, either as animal feed or organic nitrogen and phosphorus fertilizer. Nowadays - since the Bovine Spongiform Encephalopathy (BSE) crisis in 1999 - it is mainly used as fertilizer. Although meat and bone meals are allowed by EU regulation in organic farming, several growers’ organisations prohibited them since the BSE crisis. Incineration or melting in a cupola furnace are alternative treatment options to their direct use eliminating any risk on BSE transmission. However, these processes lead to losses of organic matter as well as nitrogen and sulfur and affect the phosphorus availability. The fact sheet shows which actions are needed to ease the statutory...
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/29505/1/moeller2015-factsheet-Meat-and-bone-meal.pdf

Nitrogen uptake by spring barley grown with red and white clover
Provedor de dados: Organic Eprints
Autores: Rees, Dr Robert; Baddeley, Dr John; Bingham, Dr Ian; Watson, Dr Christine.
A field experiment was undertaken to measure the uptake by spring barley of nitrogen at different distances from a boundary with either red or white clover. Clover plants at the boundary with the barley were labelled with a foliar 15N application.  Its distance from the clover boundary did not signifi-cantly affect nitrogen uptake by the barley.  However measurements of the isotopic label showed a transfer of 2.5% of the N from the red clover and 1% of the N from the white clover to the barley over short dis-tances. The study has indicated that transfer of N between clover and cereals is spatially limited and at least within the first year, it is unlikely to provide agronomically significant supplies of N
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2006
URL: http://orgprints.org/7368/1/Nitrogen_transfer_between_clover_and_barleyFinal.doc

Spretthaler - jordas små kaniner
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun; Fjellberg, Arne.
Spretthaler er en gruppe med små dyr som lever i vegetasjonen, i strølaget og nedover i selve jorda til ca 15 cm dyp. De er viktige omdannere og nedbrytere av dødt plantemateriale og bidrar vesentlig til sirkulering av næringsstoffer.
Tipo: Report
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Soil; Biodiversity and ecosystem services.
Ano: 2011
URL: http://orgprints.org/30200/1/TEMA_6_15_Spretthaler%20endelig.pdf

Fertilization of Dioscorea rotundata with poultry manure: effects on nutrient dynamics and yield formation
Provedor de dados: Organic Eprints
Autores: Andres, Christian.
Yams (Dioscorea spp.) are tropical tuber crops with high food and market values, contributing significantly to food security in West Africa. The traditional method of cultivation is without fertilizers as the first crop after clearing land from natural vegetation (e.g. forests) because of their high requirements in terms of soil fertility. However, due to increased population pressure on arable land, forests have become rare, fallow periods shorter, and long term fallowing more difficult in West Africa. Consequently, declining soil fertility is one of the major constraints to yam productivity and yam yields are thus far below the estimated potential. These problems call for the development of more integrated and sustainable yam production systems.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2013
URL: http://orgprints.org/25220/1/andres-2013-Summary-awardedPosterpresentation-Tropentag.pdf

Toepassing gefilterd digestaat in de biologische fruitteelt: Resultaten demo 2014
Provedor de dados: Organic Eprints
Autores: Cuijpers, Willemijn; Water, van de, Martin.
In het praktijknetwerk Benutting Organische Kringloopstikstof is onderzocht hoe de stikstofbeschikbaarheid in de biologische fruitteelt te verbeteren is door middel van toediening van vloeibare organische meststoffen. De proef is uitgevoerd in een biologisch perceel met een jonge aanplant van Conference peren, met een moeizame opname van stikstof. In de proef zijn twee vloeibare organische meststoffen vergeleken, die in principe door middel van fertigatie toegediend zouden kunnen worden. Het gaat om gefilterd digestaat, en Organic Plant Feed korrels die opgelost zijn in water. De vloeibare meststoffen zijn in deze proef niet in druppelaars toegediend, maar in 3 giften uitgebracht en direct oppervlakkig ondergewerkt. Tijdens het seizoen zijn de gehaltes in...
Tipo: Report
Palavras-chave: Nutrient turnover; Crop husbandry; Soil; Fruit and berries.
Ano: 2015
URL: http://orgprints.org/30041/1/3069.pdf

Entwicklung der Grundnährstoffgehalte in einem schwach lehmigen Sandboden Nordostdeutschlands nach langjähriger ökologischer Bewirtschaftung
Provedor de dados: Organic Eprints
Autores: Gruber, Harriet.
Ziel der Untersuchungen in der seit 1992 ökologisch und praxisnah bewirtschafteten Fruchtfolge sind Aussagen zur Entwicklung der Gehalte im Boden bei Berücksichtigung der Nährstoffzu- und -abfuhr unter den vorliegenden Standortbedingungn. Bei einer leicht positiven Phosphorbilanz zeigte sich im Mittel der Schläge eine schwache Tendenz zu abnehmenden P2O5-Gehalte im Boden. Die Kaliumbilanz ergab einen positiven Saldo, wobei im Mittel ein negativer Trend der K2O-Gehalte im Boden zu verzeichnen war. Die Magnesiumgehalte zeigten wenig Veränderung.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2009
URL: http://orgprints.org/16741/1/poster.pdf

Relationship between nitrogen cycling and nitrous oxide emission in grass-clover pasture
Provedor de dados: Organic Eprints
Autores: Ambus, P.
The paper reports on a work assessing the relationship between gross N transformations in grass-clover soils and emissions of nitrous oxide. By this manner, the source strength of the biogenic processes responsible for nitrous oxide production is evaluated.
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/1781/2/1781.pdf

Effect of using water extracts of compost and organic materials on soil fertility and plant nutrition
Provedor de dados: Organic Eprints
Autores: HAMDY EL NAGGAR, Ahmed.
The aim of this work is to obtain a number of complete soluble compost extracts rich in macronutrients which can be used for fertigation safely through modern irrigation systems and to evaluate their effects on soil fertility and potato (c.v. Sieglinde) growth under organic farming system. Three materials were treated with water to obtain the following dilution ratios: Farm Compost 1:5 (FC5); Farm Compost 1:20 (FC20); Farm Compost + Guano 0.75: 0.25: 5 (FCG); Guano 0.25:5 (G) and Commercial Compost 1: 10 (CC). The release of the nutrients (N, P, K, Ca, Mg) from the aforementioned treatments was monitored as a function of time. The effect of dilution, C/N ratio of the amendments, and Guano additions to compost were determined. During 10 days of extraction,...
Tipo: Thesis
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2002
URL: http://orgprints.org/6469/1/AhmedElNaggar02.pdf

Soil Nitrogen: research and extension
Provedor de dados: Organic Eprints
These are the proceedings of the 4th QLIF workshiop with contributions of several European soil and nitrogen researchers.
Tipo: Proceedings
Palavras-chave: Nutrient turnover; Soil.
Ano: 2008
URL: http://orgprints.org/13548/1/QLIF_2008__Nitrogen.pdf

Er kamme et alternativ til pløjning?
Provedor de dados: Organic Eprints
Autores: Bugge Henriksen, Christian.
På Landbohøskolen arbejder vi med et alternativt jordbearbejdningssystem, hvor man i stedet for at pløje hypper jorden op i kamme om efteråret. Opsætning af kamme hvor det øverste jordlag lægges ind i kammen er en langt mere skånsom jordbehandling end pløjning hvor jorden vendes rundt. I forhold til andre former for pløjefri dyrkning har kamme den umiddelbare fordel, at de giver bedre mulighed for at indarbejde husdyrgødning og afgrøderester i jorden, ligesom de giver bedre mulighed for at bekæmpe ukrudtet mekanisk. Vores foreløbige resultater viser desuden at kamme rummer muligheder for at reducere udvaskningen af kvælstof og øge omsætningen af organisk stof.  I det nystartede projekt (CARMINA) undersøger vi mulighederne for at få dyrknings-systemer med...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality; Production systems; Soil tillage.
Ano: 2000
URL: http://orgprints.org/483/1/SEMINAR2000.pdf

Produção agroecológica de mudas e desenvolvimento a campo de couve-chinesa.
Provedor de dados: Organic Eprints
Autores: Tessaro, Dinéia; Matter, Juliana Maria; Kuczman, Osvaldo; Furtado, Lucia de Fatima; Costa, Luiz Antonio de Mendonça; Costa, Monica Sarolli Silva de Mendonça.
O trabalho foi desenvolvido em duas etapas: a produção de mudas de couve-chinesa em bandejas e posterior transplante para o campo, objetivando avaliar o desempenho de diferentes substratos sobre o desenvolvimento da cultura. Para isso determinou-se, tanto na fase de formação das mudas, quanto nas plantas adultas, o comprimento da parte aérea, número de folhas, comprimento da raiz, massa seca da parte aérea, massa seca da raiz e diâmetro do coleto. A etapa de produção de mudas foi conduzida em ambiente protegido, com os seguintes tratamentos: T0 substrato comercial Plantmax® (HA); T1: 100% composto; T2: 95% composto + 2,5% areia + 2,5% pó de rocha; T3: 90% composto + 3% areia + 7% de pó de rocha e T4: 85% composto + 6% areia + 9% pó de rocha. Na produção de...
Tipo: Journal paper
Palavras-chave: Production systems; Farming Systems; Nutrient turnover.
Ano: 2012
URL: http://orgprints.org/28507/1/Tessaro_produ%C3%A7%C3%A3o.pdf

Organic manures as sources of fertiliser sulphur
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
On a global scale, S excretion from domestic animals may be estimated to around 8 million t per year, corresponding to 80% of the World S consumption for mineral fertiliser manufacture. The utilisation of this potential source of fertiliser-S is discussed focusing on the use of manure from housing and manure storages applied to agricultural land. Especially in the developed countries the S content of manure collected from cattle and pigs (1 million t S per year) has a potential as S-fertiliser, as legal demands on the utilisation of manure N and/or P already require the use of animal wastes as fertilisers. Content and composition of manure-S from both monogastrics and ruminants may be extremely variable, depending on the S content of the feed. If the diet...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/1411/1/Proc_505_Eriksen_proof.pdf

AMARANTHS (Amaranthus viridis) Dry matter and soil qualities: Organic Vs Inorganic Fertilizers
Provedor de dados: Organic Eprints
Autores: ADEOLUWA, OLUGBENGA O.; AKINYEMI, OLUWASEYI.
Continuous use of mineral fertilizer in soils is associated with reduced crop and soil quality.In this report, comparative effects of poultry manure and its extract, compost and mineral fertilizers was observed.   The study was carried out on the field in two successive plantings (first planting and residual) at the Department of Agronomy, University of Ibadan, Ibadan, Nigeria. The treatments used were poultry manure, poultry manure extract, NPK(15-15-15), and control. Fertilizer treatments applied at 100 kg N / ha were laid in a completely randomized block design with four replicates.   Observations taken percentage dry matter and some chemical properties of the post harvest soils. Analysis of   variance (ANOVA) at (P&lt;0.05) was used as statistical...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/24105/1/24105%20OWC14%20A4_MM.pdf

Redistribution of sulphur during generative growth of barley with different sulphur and nitrogen status.
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Nielsen, M; Mortensen, JV; Schjørring, JK.
The effect of S and N application on the distribution and redistribution of S compounds in spring barley (Hordeum vulgare L.) was investigated in pot experiments by determination of changes in the content of total-, sulphate- and thiol-S in leaves, ears and stems during the grain-filling period. Nitrogen and sulphur had a clear interactive effect on the yield of all plant parts with little or no effect of S at low N application rates and similar low effect of N without S application. The sulphate concentration in the different plant parts was markedly affected by the S application rate. This effect was most pronounced in leaves, less in stems and least in ears. In S-replete plants leaf S decreased during grain development by an average of 28%, while in...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/154/1/paper.pdf

Temporal effects of organic and conventional farming systems on the chemical properties of vineyard
Provedor de dados: Organic Eprints
Autores: Erdal, Ulfet; Ongun, Ali Rıza; Sökmen, Ömer.
In this study, It is aim to compare the effects of chemical properties in organic and conventional vineyard farming system for 9 year long between 2000-2009.in Manisa,Salihli, in Aegean Region. The study was carried out in 5 replicates completely randomized design According to soil analysis results, certified fertilizer and green manure and ground pruned branches were applied as plant nutrition material in organic plots. On the other hand, 21% ammonium sulphate, 26% ammonium nitrate, 43% triple super phosphate as P2O5 and 48-52% potassium sulphate as K2O were applied in conventional plots. According to soil analysis results, there were no changes in saturation, salinity and lime values in both farming system. In conventional plots, phosphorus level...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farming Systems; Nutrient turnover; Soil.
Ano: 2016
URL: http://orgprints.org/32501/1/%C3%9Clfet%20Erdal%20Bursa.pdf

Effects of green manure storage and incorporation methods on nitrogen release and N2O emissions after soil application
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Sørensen, Peter; Petersen, Søren O.; Ma, Xiuzhi; Ambus, Per.
More efficient use of green manure-derived nitrogen (N) may improve crop yields and reduce environmental impacts in stockless organic arable farming. In this 3-month incubation study, we tested a new strategy where green manure leys are harvested and preserved until the following spring either as compost mixed with straw or as silage of harvested ley biomass. Grass-clover compost or silage was soil-incorporated by either simulated ploughing (green manure placed at 15 cm depth) or harrowing (green manure mixed into the upper 5-cm soil horizon) in order to assess treatment effects on net release of plant-available N, nitrous oxide (N2O) fluxes, and soil respiration. Grass-clover silage provided the highest net N release with similar results for the two...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2014
URL: http://orgprints.org/27643/25/Carter%20et%20al.%202014_BFOS.pdf

Dry matter yield, chemical composition and estimated extractable protein of legume and grass species during the spring growth
Provedor de dados: Organic Eprints
Autores: Solati, Z; Jørgensen, U; Eriksen, J; Søegaard, K.
BACKGROUND: Knowledge of the variation of extractable protein amount in legumes and grasses as affected by harvest time is important for identifying optimal combinations to enable a high protein production in a biorefinery. The extractability of protein was estimated using the Cornell Net Carbohydrate and Protein System across six harvests during the spring growth.  RESULTS: The estimated extractable protein [g kg−1 dry matter (DM)] defined as the easily available fractions B1+B2 was significantly higher in white clover and lucerne at all harvests while, if the more cell wall attached fraction B3 can be extracted, white clover had the highest extractable protein amongst all species. Total yield of B1+B2 per ha was higher in white clover and red clover at...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32972/1/Solati_et_al-2017-Journal_of_the_Science_of_Food_and_Agriculture%20%282%29.pdf

Leaching of soil organic carbon and nitrogen in sandy soils after cultivating grass-clover swards
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.; Hansen, E.M.; Eriksen, J.
Dissolved organic matter is the basis for many of the biogeochemical processes in the soil. Several studies have focused on the formation and losses of dissolved organic matter in forest systems, whereas a limited number have dealt with this aspect in agricultural soils. The purpose of this study was to estimate the leaching of dissolved organic carbon (DOC) and nitrogen (DON), with focus on the period after cultivating grass-clover swards. Grass-clovers were ploughed in the spring prior to sowing cereals followed by either catch crops or bare soil. The concentrations of DOC and DON decreased with soil depth and ranged at 90 cm soil depth between 7 and 21 mg C L-1, and between 1 and 3 mg N L-1, respectively in a sandy loam soil, and between 16 and 63 mg C...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Pasture and forage crops; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/5371/1/5371.pdf

EFFECTS OF COVER CROP MANAGEMENT AND COMPOST APPLICATION ON SOIL FERTILITY OF ORGANIC MELON
Provedor de dados: Organic Eprints
Autores: Tittarelli, F.; Campanelli, G.; Farina, R.; Napoli, R.; Ciaccia, C.; Testani, E.; Leteo, F.; Canali, S.
A field experiment was carried out in Central Italy on growing melon (Cucumis melo L.) after barley (Hordeum vulgare L.). Three different systems of cover crop termination (green manure, roller crimper and fallow, as control) were combined with three doses of compost (0, 15  and 30 t ha-1 d.m.) in a strip plot design. The main objective of the research was to evaluate their effects on organic melon production and on short and long term soil nitrogen (N) fertility. Marketable yield and quality and soil N availability along the melon cycle were determined and a simplified N budget calculated. Green manure (GM) treatment showed the highest total and marketable yield, followed by fallow (FA), while roller crimper (RC) was characterized by a significant lower...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2013
URL: http://orgprints.org/23596/1/23596_Tittarelli_MM.pdf

Eiweißstoffwechsel und Bodenfruchtbarkeit
Provedor de dados: Organic Eprints
Autores: Scheller, Edwin.
Die Lebensprozesse im Boden werden in hohem Maße durch den Eiweißstoffwechsel getragen. Je ausgewogener und besser der Eiweißstoffwechsel, desto besser sind auch die Parameter der Bodenfruchtbarkeit. Zudem scheint es einen Zusammenhang zwischen der durch die Kupferchloridkristallisation erfassbaren Produktqualität und dem Eiweißstoffwechsel im Boden zu geben. (aus: Bioland 1/2002)
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology.
Ano: 2002
URL: http://orgprints.org/1369/1/1369%2Dscheller%2D2001%2Deiwei%C3%9Fstoffwechsel%2DBioland.pdf

PlantyOrganic; bedrijfsontwerp.
Provedor de dados: Organic Eprints
Autores: van der Burgt, Geert-Jan.
Increasingly strict legislation about fertilizer inputs and developing organic regulations are a strong  stimulation to optimize the internal nutrient dynamics of organic arable farms. In the project  “PlantyOrganic”, initialized by Biowad and realized at SPNA location Kollumerwaard, a challenging  arable system is developed and tested: 100% internal nitrogen supply without input of nutrients from  outside. In this report the design of the rotation and fertilizer scheme is presented and discussed, and  the starting conditions in spring 2012 are documented.
Tipo: Report
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/21698/1/2012%2D030_LbP_PlantyOrganic_Bedrijfsontwerp_DIGITAAL_no_blancs.pdf

Fate of 15N- and 14C from labelled plant material: Recovery in perennial ryegrass-clover mixtures and in pore water of the sward
Provedor de dados: Organic Eprints
Autores: Rasmussen, J.; Gjettermann, B.; Eriksen, J.; Jensen, E.S.; Høgh-Jensen, H.
The below ground C and N dynamics leading to organic and inorganic N leaching from perennial ryegrass-clover mixtures are not well understood. Based on the hypothesis that four different plant materials would degrade differently, a 16 months field experiment was conducted to determine (i) the source strength of labelled plant residues in dissolved inorganic N (DIN) and dissolved organic N (DON) in pore water from the plough layer, and (ii) the plant uptake of organically bound N. Litterbags containing 14C- and 15N-labelled ryegrass or clover roots or leaves were inserted into the sward of a ryegrass-clover mixture in early spring. The fate of the released 14C and 15N was monitored in harvested biomass, roots, soil, and pore water percolating from the...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/16290/1/16290.pdf

Utilisation of Compost at Sheepdrove Organic Farm
Provedor de dados: Organic Eprints
Autores: Philipps,.
Organic soil management focuses on optimising soil biological activity, recycling nutrients, water retention and drainage.  Composting the FYM materials derived from within the SOF system was thought to be insufficient to supply the nutrient requirements across the entire farm. Organic standards permit the importation of some supplementary nutrients, if these are in the form of organic matter then composting is required for at least six months prior to being spread on organic land. Composting is a recommended practice for organic farming systems, as there is ample evidence that a good composting process effectively kills weed seeds and pathogens.   The wider sustainability issues that SOF are concerned with lead to the development of composting stable...
Tipo: Report
Palavras-chave: Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/10304/1/Interim_report_on_compost_oct_2003.doc

Effect of nose ringing and stocking rate of pregnant and lactating outdoor sows on exploratory behavior, grass cover and nutrient loss potential
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Studnitz, M.; Strudsholm, K.; Kongsted, A.G.; Hermansen, J.E.
Nose ringing of outdoor sows is practiced to reduce grass sward damage for environmental reasons but conflicts with natural behaviour considerations. We investigated effects of ringing pregnant and lactating outdoor sows on foraging and explorative behaviour, grass cover and nutrient deposition. The experiment included both ringed and unringed sows. For unringed sows the paddocks were either used continuously throughout the experiment or divided into two and sows were moved half way through the experimental period leaving the first used paddock for regrowth. Ringing did not prevent the sow’s rooting, but rooting was less pronounced, when sows were ringed. On average, ringing increased grass cover from 14 to 38% and from 64 to 81% in paddocks with pregnant...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Pigs; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/10043/1/10043.pdf

Mineral nitrogen in the course of a cash crop and two livestock rotations - first results from the long-term monitoring Trenthorst
Provedor de dados: Organic Eprints
Autores: Schaub, Dagmar; Paulsen, Hans Marten; Böhm, Herwart; Rahmann, Gerold.
The long-term monitoring Trenthorst, situated near Lübeck in a temperate maritime climate on loamy soils, was established in 2003 and compares two cash crop and three livestock farming systems. We studied the soil mineral nitrogen contents of one cash crop and two livestock farms, specialised in dairy cows and goats/oilseeds resp., with the hypothesis that the livestock farms show a more even course of Nmin in the rotation and a higher rotation mean. The rotation average of Nmin in the cash crop farm was not lower than the ones in the livestock farms. But in the course of the rotations differences became evident: compared to the livestock farms the cash crop farm showed higher Nmin-values after the first rotation year (mulched vs. cut grass clover) but...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions.
Ano: 2008
URL: http://orgprints.org/12230/1/Schaub_12230_ed.doc

Phosphorus supply to organic agriculture:WHAT DOES THE ORGANIC SECTOR THINK ABOUT DIFFERENT PHOSPHORUS FERTILIZERS?
Provedor de dados: Organic Eprints
Autores: Løes, Anne-Kristin.
Workshops were held in sixEuropean countries participating in the CORE Organic-project IMPROVE-P, to explore the opinions among organic agriculture (OA) stakeholders on recycled fertilizer products. Phosphorus (P) will be depleted over time in soil via export of farm products, and needs replacement to maintain soil fertility. Green waste was the most popular fertilizer product, accepted by more than 90% of the respondents. Least popular was conventional manure from fur animals, but even for this material, more than 30% of the stakeholders were willing to accept its use in OA. There is a large interest among organic stakeholders in fertilizer products derived from human excreta, provided these can be controlled to be safe with respect to food safety issues...
Tipo: Report
Palavras-chave: "Organics" in general; Soil quality; Farming Systems; Soil biology; Nutrient turnover; Soil.
Ano: 2016
URL: http://orgprints.org/30368/1/NORS%C3%98K%20RAPPORT%20nr%203%202016%20P%20FERTILIZERS.pdf

Højere økologiske udbytter med flere tilgængelige næringsstoffer
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Magid, J.
Der er stor enighed om, at bedre tilgængelighed af næringsstoffer er nøglen til højere udbytter; spørgsmålet er dog stadig hvilke alternative løsninger, der kan anvendes i den økologiske produktion.
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/35341/1/index.html

Vlinderbloemigen tillen stikstofvoorziening naar een hoger niveau
Provedor de dados: Organic Eprints
Autores: Beeckman, Annelies; Delanote, Lieven.
Groenbemesters winnen algemeen aan belang om erosie tegen te gaan en om het nitraatresidu in de bodem te beperken. In de gangbare landbouw komen groenbemesters steeds ‘na’ een teelt. In de biologische landbouw vervullen groenbemesters echter ook een sleutelfunctie als groenbemestingsgewas ‘vóór’ een teelt.  MAP4 stuurt vrij eenzijdig naar het gebruik van grasachtige en bladrijke groenbemesters. Uitgaande van de N- en P-normen in MAP4 en de intentie om tot meer gesloten kringlopen te komen, zijn vlinderbloemige groenbemesters evenwel meer dan ooit van belang voor de biologische landbouw.  In dit project werd nagegaan welke vlinderbloemige groenbemesters beschikbaar zijn en wat de mogelijkheden van inzaai op drie momenten in het jaar zijn. Hierbij werd zowel...
Tipo: Report
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Farm nutrient management.
Ano: 2013
URL: http://orgprints.org/27432/1/vv%20leguminoos%20grandioos%20Inagro%202012%202013.pdf

Betydning af efterafgrøder:erfaringer fra sædskifteforsøgene.
Provedor de dados: Organic Eprints
Autores: Tersbøl, Michael.
Efterafgrøder – der også kaldes fangafgrøder - giver ikke i alle situationer et merudbytte i sædskiftet, men de mindsker udvaskningen af kvælstof, giver et mere stabilt udbytte og forbedrer frugtbarheden på længere sigt.
Tipo: Web product
Palavras-chave: Nutrient turnover; Crop combinations and interactions.
Ano: 2004
URL: http://orgprints.org/3908/1/3908.pdf

A comparative study of nitrate leaching from intensively managed monoculture grass and grass-clover pastures
Provedor de dados: Organic Eprints
Autores: P.S., Hooda; M., Moynagh; I.F., Svoboda; H.A., Anderson.
Nitrate leaching losses from intensively managed monoculture grass and grass-clover pastures were measured during 1994-96 at a long-term experimental farm in south-west Scotland. Field-size lysimeter plots were established in 1993 on the existing pastures on a silty clay loam non-calcareous gley. No fertilizer-N was applied to the grass-clover, while the monoculture grass was fertilized with c.240 kg N ha-1 year-1, but both swards received 2-3 cattle slurry applications annually (120-390 kg total N ha-1 year-1). The pastures supported 2-3 cuts for silage conservation, and were grazed by dairy cattle and stocked with sheep during the winter months.   Initially, leachate nitrate concentrations from the fertilized grass were considerably larger than those...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 1998
URL: http://orgprints.org/6175/1/Younie2002Effect.pdf

A flexible tool for simulation of soil carbon turnover
Provedor de dados: Organic Eprints
Autores: Petersen, B.M.; Olesen, J.E.; Heidmann, T.
Existing models of soil organic matter (SOM) turnover are implemented within rigid and often complex modelling environments, which makes the testing of influence of SOM model structure a rather difficult task.  A new soil carbon turnover simulation tool is presented (C-TOOL v. 1.0). It facilitates the construction of a wide range of user-definable SOM models based on linked SOM pools and a decay described for each pool by first order kinetics. Simulation of carbon isotopes 13C and 14C is facilitated. No programming is necessary for defining or redefining models, as the model structure is given in set-up files. The program is fast, and can utilise a range of time-steps, which enhances the computation of steady level SOM contents.  The ability of C-TOOL to...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/85/1/85.doc

Svovl til korn
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/225/1/Svovl_til_korn.doc

Cropping systems with winter wheat or spring wheat? Root growth, catch crops, nitrogen leaching and baking quality
Provedor de dados: Organic Eprints
Autores: Thorup-Kristensen, Kristian; Pedersen, Lene.
In organic farming winter wheat is typically grown after good pre-crops, as it pays well for this in terms of yield and quality. However, winter wheat develops slowly during the autumn, and much nitrate may be lost by leaching before spring. System with catch crops followed by spring wheat, or maybe catch crops intercropped with winter wheat could improve the utilization of the pre-crop effects in wheat cropping. In this experiment we studied wheat and catch crop root growth, crop and soil N dynamics, and effects on yield and baking quality in wheat cropping systems with catch crops.  The results showed that the com-bination of catch crops and spring wheat was ideal for resource use, but also that winter wheat had a much deeper root system (c. 2.0 m) than...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2006
URL: http://orgprints.org/7483/1/Paper_for_congress.doc

Regenwormen – Architecten van vruchtbare grond
Provedor de dados: Organic Eprints
Autores: Pfiffner, Lukas.
Deze brochure geeft een kort overzicht van de biologie, de ecologie en de meervoudige diensten van regenwormen aan landbouwers en geeft aanbevelingen voor de bevordering van deze buitengewone wezens in landbouwbodems.
Tipo: Book
Palavras-chave: Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32187/1/Brochure_Regenwormen%20%E2%80%93%20Architecten%20van%20vruchtbare%20grond.pdf

Compost duurzaam ingezet. De Compost Scorekaarten: een instrument voor het afwegen van de waarde van compost
Provedor de dados: Organic Eprints
Autores: Schrik, Yannick; Koopmans, Chris.
Het duurzame gebruik van een reststof zoals compost hangt sterk samen met de waarde die de compost heeft bij toepassing. Deze publicatie geeft via heldere Compost Score Kaarten inzicht in het vinden van de juiste compostsoort voor het gewenste doel. Of het nu gaat om organischestofvoorziening, verbetering van de bodemstructuur of de nutriëntenvoorziening van gewassen: een bewuste keuze voor de compostsoort en –kwaliteit draagt bij aan een duurzame inzet en duurzaam hergebruik van reststoffen.
Tipo: Other
Palavras-chave: Soil quality; Nutrient turnover; Environmental aspects.
Ano: 2015
URL: http://orgprints.org/29451/1/2793.pdf

Entwicklung eines Prognosemodells für den N-Düngebedarf im  ökologischen Gemüsebau
Provedor de dados: Organic Eprints
Autores: Sradnick, A.; Feller, C.; Fink, M.
Several field grown vegetables are known to have a short vegetation period coupled with a high nitrogen demand. The proposed amendment of the German fertilization ordinance provides several changes. Thus in future organic vegetable farmers have to adapt their fertilization to reduce nitrogen surplus but still produce vegetables with good quality. The aim of our work was to predict the nitrogen supply in organic vegetable production with a simple model. This should allow organic farmers to reduce the nitrogen surplus and facilitate them to meet the regulation of the new fertilization ordinance. Therefore the parameters to predict the maximal nitrogen supply in organic fertilizers and their mineralization constants were estimated by single kinetic functions....
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Vegetables.
Ano: 2017
URL: http://orgprints.org/31860/1/Entwicklung%20eines%20Prognosemodells%20f%C3%BCr%20den%20ND%C3%BCngebedarf.pdf

Criteri di ammissibilità e di utilizzo degli effluenti di allevamento e dei concimi ed ammendanti derivati in agricoltura biologica.
Provedor de dados: Organic Eprints
Autores: Canali, Dr. Stefano; Riva, Dr. Francesco; Dell'Orco, Dr. Silvia.
Nel modello agricolo biologico l’utilizzo degli effluenti animali e dei concimi e ammendanti da loro derivati riveste un ruolo fondamentale nella gestione della fertilità del suolo, anche in considerazione dello scarso contenuto in sostanza organica dei suoli mediterranei. Questi mezzi tecnici devono garantire una qualità agronomica, ambientale e igienico sanitaria, in relazione alle condizioni in cui le attività di produzione ani-male e vegetale sono realizzate e rispettare tutti i vincoli normativi nazionali ed europei  in vigore. Nel presente contributo, vengono discusse le condizioni di ammissibilità degli effluenti in base all’allevamento di origine e ai trattamenti di stabilizzazione che questi devono subire prima della loro distribuzione sul terreno...
Tipo: Working paper
Palavras-chave: Nutrient turnover; Regulation; Quality and evaluation of inputs; Farm nutrient management; Animal husbandry.
Ano: 2005
URL: http://orgprints.org/7808/1/Zootbiol_WP8.pdf

CN-SIM - a model for the turnover of soil organic matter. I: Long term carbon development
Provedor de dados: Organic Eprints
Autores: Petersen, B.M.; Berntsen, J.; Hansen, S.; Jensen, L.S.
A computer model is presented that describes the flow of C and N in the soil. It employs a structure with conceptual compartments. Organic matter is represented by seven different compartments, two for added matter, two for soil microbial biomass, one for microbial residues, one for native organic matter, and one for inert organic matter. The latter pool probably represents both truly inert matter, and matter with a very slow turnover. This paper describes the parameterisation and performance of this model on selected long-term field data from United Kingdom, Sweden and Denmark. Statistical methods were employed to optimise parameters, and obtain proximate confidence intervals for these parameters. Very satisfactory simulations could be acquired, using the...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/87/1/87.pdf

Formas de fósforo no tecido de plantas anuais de inverno cultivadas em Latossolo Vermelho sob diferentes sistemas de manejo de solo
Provedor de dados: Organic Eprints
Autores: CASALI, C.A.; KAMINSKI, J.; SANTOS, D.R.; CALEGARI, A.; PICCIN, R.; GEBERT, F.H.; BELLINASO, R.J.S.; ROSSATO, L.F.R.
As plantas de cobertura propiciam a proteção e a reciclagem de nutrientes do solo, como o fósforo (P). Contudo, o teor e as formas de acúmulo de P podem variar entre espécies e sistemas de manejo de solo. O objetivo do trabalho foi avaliar as formas de acúmulo de P no tecido vegetal de plantas anuais de inverno, manejadas sob Sistema Plantio Direto (SPD) e Cultivo Convencional (SCC). O experimento foi instalado em 1986 no Instituto Agronômico do Paraná, em Pato Branco-PR, sobre um Latossolo Vermelho aluminoférrico. Ele se baseia no uso de seis plantas anuais de inverno (trigo, aveia branca, centeio, ervilhaca, nabo forrageiro e tremoço azul) que foram manejadas sob SPD e SCC. Em maio de 2011 as espécies foram semeadas, sem o uso de fertilizantes, e em...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil tillage; Greenhouses and coverings.
Ano: 2012
URL: http://orgprints.org/29924/1/2012%20-%20Casali%20-%20Fertbio%20Formas%20de%20f%C3%B3sforo.pdf

Das PC-Programm BEFU, Teil Ökologischer Landbau
Provedor de dados: Organic Eprints
Autores: Kolbe, Hartmut; Köhler, Brigitte.
Im Ökologischen Landbau stehen heute Aufgaben an, für die umfangreiche Kalkulationen erforderlich sind. Mit neuen gesetzlich Anforderungen (DüV, CC) und der vertieften Betriebsberatung steigt die Nachfrage nach PC-gestützten Programmen. Auf der Grundlage langjähriger Erfahrungen beim Einsatz des Programms BEFU in Sachsen wurden Prinzipien zur Grunddüngung, Nährstoff- und Humusbilanzierung und zur Berechnung der legumen N-Bindung entwickelt. Ziel ist es, mit speziell an die Produktionsbedingungen des Ökologischen Landbaus angepassten Modulen sowohl Verfahren für einfache Berechnungen als auch für die vertiefte Betriebsberatung anzubieten.
Tipo: Journal paper
Palavras-chave: Environmental aspects; Nutrient turnover; Knowledge management; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/8977/1/Infodienst_07_06_Oeko_BEFU.pdf

Phosphor und Kalium im ökologischen Landbau – aktuelle Probleme, Herausforderungen, Düngungsstrategien
Provedor de dados: Organic Eprints
Autores: Kolbe, Hartmut.
Über die augenblickliche Situation und Entwicklungstendenzen der Nährstoffversorgung auf den Ökobetrieben liegen keine umfassenden Erkenntnisse vor. Nach Untersuchungen in Sachsen bzw. Sachsen-Anhalt wird nur eine sehr geringe Anzahl der Bodengehalte an Phosphor (P) und Kalium (K) der Ackerflächen in die VDLUFA-Versorgungsklasse A eingestuft und aus den hohen Anteilen an den Versorgungsstufen C – E kann ein relativ gutes Versorgungsniveau abgeleitet werden. Aus flächenbezogenen Nährstoffbilanzierungen der Ökobetriebe gehen im Durchschnitt jedoch negative P- und K-Salden hervor. Im Laufe der Zeit haben sich deutlich unterschiedliche Vorstellungen zur Grunddüngung und Bodenuntersuchung im Ökolandbau entwickelt, die kurz angesprochen werden:   - Auf Grund der...
Tipo: Book chapter
Palavras-chave: Composting and manuring; Nutrient turnover; Air and water emissions; Soil.
Ano: 2010
URL: http://orgprints.org/19354/1/P_K_Oeko10.pdf

Kann man bei der Nährstoffbilanzierung im ökologischen Anbau mit den üblichen Faustzahlen rechnen?
Provedor de dados: Organic Eprints
Autores: Raupp, Dr Joachim.
Nutrient budgets are an important tool of farm planning. Normally the amounts of manure, feedstuffs, yields etc. as well as their nutrient contents are measured and analysed in each single case. If this is impossible for labour reasons, standard data sets of nutrient contents in agricultural products have to be used. However, these data sets have been determined in conventional farming. Thus, the question arises, whether theses results can be transferred to organically grown crops. This question was investigated with rye samples of a long-term trial with farmyard manure and mineral fertilization.     In many cases the N, P and K contents in organically and minerally fertilized samples differed significantly, though one of the treatments did not always show...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2001
URL: http://orgprints.org/768/1/rapft01%2D2.pdf

Konsulenternes erfaringer med udbyttebegrænsende faktorer på de økologiske bedrifter
Provedor de dados: Organic Eprints
Autores: Askegaard, M; Hermansen, S.
Resultat af spørgeskemaundersøgelse blandt de økologiske planteavlskonsulenter. Konsulenterne kommer med deres bedste bud på de udbyttebegrænsende faktorer i deres lokalområder
Tipo: Report
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2017
URL: http://orgprints.org/33007/1/Oe-17-3855-Resultat-sporgesundersogelse-blandt-oekologiske-planteavlskonsulenter.pdf

Livet i jorda og jordlappen, foredrag og demonstrasjon
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun.
Foredrag om jordliv og vurdering av jorda. Praktiske øvelser med lupe hvor en ser på jordorganismer og jordaggregat. Demonstrasjon av 10 indikatorer som inngår i Jordlappen Trinn 1. Tingvoll
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Soil.
Ano: 2017

Species diversity effects on productivity, persistence and quality of multispecies swards in a four-year experiment
Provedor de dados: Organic Eprints
Autores: Jing, J; Søegaard, K; Cong, W-F; Eriksen, J.
Plant species diversity may benefit natural grassland productivity, but its effect in managed grassland systems is not well understood. A four-year multispecies grassland experiment was conducted to investigate the effect of species diversity legumes and non-leguminous forbs on productivity, persistence and sward quality under cutting or grazing regimes and with or without slurry application. Three mixtures were established± 3-mix: grass, red and white clover, 10-mix: 3-mix plus birdsfoot trefoil and six non-leguminous forbs, and 12-mix: 10-mix plus lucerne and festulolium. Species diversity increased sward production and yield persistence under cutting regime. The 12-mix had the highest yield from the second year onwards and no statistically significant...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32971/1/Jing%20et%20al.%202017.pdf

Hvad kan jordbundsanalyser bruges til?
Provedor de dados: Organic Eprints
Autores: Plantener, Pernille.
Der udbydes mange forskellige jordbundsanalyser af forskellige analyseinstitutter. Du kan enten selv udtage prøverne, evt. med udstyr, du låner hos os, eller bestille Gefion til at gøre det. Vi anbefaler at prøverne sendes til analyse gennem os, da vi har en god aftale med det troværdige, tyske laboratorium AgroLab. Sammen med resultaterne vil du modtage eventuelle anbefalinger herfra. Fra udtagning til svar på prøverne og anbefaling af tiltag skal du regne med 1 måned.
Tipo: Report chapter
Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/27267/1/Hvad%20kan%20jordbundsanalyser%20bruges%20til.%20P.%20Plantener.pdf

Waste materials from biogas production - effects on soil fertility and climate
Provedor de dados: Organic Eprints
Autores: Johansen , Anders; Carter, Mette S.; Hauggaard-Nielsen, Henrik; Løes, Anne-Kristin.
Future agricultureal systems will produce bioenergy on  basis of on- and off-farm crops and residues, implying beneficial recycling of plant nutrients back to soil and plants. This will reduce emission of climate gases and may also reduce spread of weed seeds, parasites and pathogens. However, it may also induce long-term reduction in soil organic pools.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover; Health and welfare; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/19474/4/19474.pdf

Wat is beter: compost of bokashi?: Bokashi is voedsel voor het bodemleven, compost is geschikt om in te planten
Provedor de dados: Organic Eprints
Autores: Janmaat, Leen.
Door overmatige aanvoer van diervoeders voor vlees-, ei- en melkproductie, kent Nederland een fosfaatprobleem. Dierlijke mest wordt hierdoor gediskwalificeerd tot afvalstroom, terwijl mest feitelijk een belangrijke grondstof is voor plantengroei. Bij organische mest draait het om de koolstof met daarbij verschillende mineralen waaronder ook stikstof. Afhankelijk van de samenstelling (C/N) werkt organische mest meer als voer voor het bodemleven dan wel als voeding voor de plant. Los van alle mestregels is het streven binnen de biologische sector om zoveel mogelijk biologische mest te gebruiken en daarmee kringlopen op landelijke of regi-onale schaal te sluiten.  De laatste jaren komt ook bokashi in de mode. Enkele biologische boeren zijn de mogelijkheden...
Tipo: Newspaper or magazine article
Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/36682/1/3269.pdf

Bio ohne Vieh ist eine grosse Herausforderung
Provedor de dados: Organic Eprints
Autores: Dierauer, Hansueli; Böhler, Daniel.
Der Trend zum viehlosen oder viehschwachen Ackerbau macht auch vor dem Biolandbau nicht Halt. Am Fallbeispiel eines viehlosen Ackerbaubtriebs im Zürcher Unterland untersuchte das FiBL die Schwierigkeiten, die sich bei der Umstellung auf Biolandbau ergeben können. Im Vordergrund stehen Fruchtfolge, Nährstoffversorgung und Direktzahlungen.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality; Policy environments and social economy.
Ano: 2004
URL: http://orgprints.org/2654/1/dierauer%2D2004%2Dviehlos%2Dim%2Dbiolandbau.pdf

Long term farming systems affect soils potential for N2O production and reduction processes under denitrifying conditions
Provedor de dados: Organic Eprints
Autores: Krause, Hans-Martin; Thonar, Cécile; Eschenbach, Wolfram; Well, Reinhard; Mäder, Paul; Behrens, Sebastian; Kappler, Andreas; Gattinger, Andreas.
N2O is a potent greenhouse gas with an atmospheric lifetime of 114 years which also contributes to ozone layer destruction. Mitigating N2O emissions is especially challenging to the agricultural sector that is responsible for the majority of anthropogenic N2O release. In order to develop effective mitigation strategies, a detailed understanding of drivers for N2O production and reduction in agriculturally managed soils is needed. Denitrification is recognized as one of the most important source processes for N2O emissions from soils. However, the last step in denitrification, the reduction of N2O to N2 is the only known sink for N2O in soil. Although the impact of single parameters on denitrification is quite well documented, there is still a knowledge gap...
Tipo: Journal paper
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32664/1/krause-etal-2017-SoilBioChem-Vol114-p31-41.pdf

Planty Organic - Voortgang 2015
Provedor de dados: Organic Eprints
Autores: Hospers-Brands, A.J.T.M.; Pollema, Thomas; Bus, Michiel.
2015 was het vierde jaar waarin de systeemontwikkeling “PlantyOrganic” in praktijk is gebracht. Op de zes percelen zijn de gewassen geteeld die voorzien waren en zijn metingen verricht aan bodem en gewas. De gebruikte meststoffen waren geheel afkomstig vanuit het eigen systeem, zoals in het ontwerp was voorzien. De stikstofbinding door de grasklaver, de motor van het systeem, bleef achter bij de verwachtingen. Daardoor waren de totaal gegeven hoeveelheden stikstof ca. 30 % lager dan waar in het ontwerp van uit is gegaan. De bodemstikstof is getoetst met metingen die in het stikstofmodel NDICEA zijn ingevoerd. De match tussen metingen en berekeningen is voldoende tot goed, met uitzondering van een onverwacht hoge meting in de zomer, na een lange droge...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Soil.
Ano: 2016
URL: http://orgprints.org/30841/1/3112.pdf

Praxiseinführung und Evaluierung eines Kalkulationsschemas zur bedarfsgerechten N-Düngung im ökologischen Freilandgemüsebau
Provedor de dados: Organic Eprints
Im Rahmen des von der Sächsischen Landesanstalt für Landwirtschaft durchgeführten Projektes wurden auf sechs ökologisch bewirtschafteten Gemüsebaubetrieben Düngungsversuche zur Demonstration des möglichen Produktivitätszuwachses durch eine bedarfsorientierte N-Düngung und zur Evaluierung eines Kalkulationsschemas in verschiedenen Gemüsekulturen angelegt. Neben betriebsüblicher Düngung (meist nur in Form von Wirtschaftsdüngern) wurden Parzellen mit einer darüber hinausgehenden N-Düngung mit organischen Handelsdüngern sowie solche ohne Wirtschaftsdüngergaben integriert.  Zusätzlich zur Ertragserfassung konnte durch Bestandesanalyse die N-Nachlieferung des Bodens, die N-Freisetzung aus Wirtschafts- und organischen Handelsdüngern sowie die N2-Fixierung von...
Tipo: Project description
Palavras-chave: Nutrient turnover; Vegetables; Composting and manuring.
Ano: 2023

Effects of bioethanol residues on the functional and genetic diversity of soil microbiota
Provedor de dados: Organic Eprints
Autores: Johansen, Anders; Stevenson, Bryan; Hauggaard-Nielsen, Henrik; Jensen, Erik Steen.
Regarding the use of residual material from bioethanol conversion, a series of experiments were performed. The work included two NZ soils from organic farming systems (Templeton and Ballantray, respectively) and treatments with three types of biomaterials: 1) residual material from bio-ethanol conversion (based on rye straw; 2) untreated rye straw; 3) grass-clover mixture - as well as a control with no amendment. The dried and ground biomaterials were supplied at 2 and 10 mg kg-1 dry soil, incubated in 1-L glass vials and harvested destructively after 3, 5 and 21 days. In this way, four experimental series were performed, each with three sequential harvests. The soil was analyzed for various microbial parameters: bacterial colony-forming units (not in all...
Tipo: Newspaper or magazine article
Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/16901/4/16901.pdf

Protocols for soil functionality assessment in vineyards
Provedor de dados: Organic Eprints
Autores: Costantini, E.A.C.; Priori, S.; Landi, S.; Lagomarsino, A.; Castaldini, M.; Giffard, B.; Fulchin, E.; Tardaguila, J.; Schroers, H.J.; Martensson, A.; Tangolar, S.; Akca, E.
The purpose of this guideline is to describe the methods used during ReSolVe project for soil functionality assessment, so they can be implemented in similar studies.  A brief introduction first underlines what are the main functions of soil and why maintaining an optimal soil functionality is particularly of major interest in viticulture.  Then the different protocols selected for ReSolVe project and this guideline are presented according to the following classification:  - Part I: assessment of soil physical and chemical features;  - Part II: assessment of soil biological features (ecosystem service provision and providers);  - Part III: assessment of rhizosphere biological features;  - Part IV: assessment of grapevine quantitative and qualitative...
Tipo: Report
Palavras-chave: Soil quality; Soil biology; Specific methods; Nutrient turnover; Soil; Technology transfer; Biodiversity and ecosystem services; Research methodology and philosophy; Viticulture.
Ano: 2018
URL: http://orgprints.org/33864/1/2018.09.19%20Protocols_for_soil_functionality_assessment_in_vineyards.pdf

Sistemas de culturas sob diferentes manejos por longa duração alteram as formas de fósforo do solo?
Provedor de dados: Organic Eprints
Autores: CASALI, C. A.
The thesis objective was to evaluate the forms of accumulation and release of phosphorus from cover crops waste under long time of different soil management systems and its relationship with the soil phosphorus forms. The experiment was established in 1986 on an Oxisol in the IAPAR experimental station in Pato Branco, Paraná State, Brazil. The treatments consisted of six winter cover crops (blue lupine, vetch, oats, radish, rye and wheat) and the winter fallow treatment, cultivated under no-tillage (NT) and conventional (CT). In September 2011 were collected soil samples (0-5 and 5-10 cm) and the shoots of winter cover crops. Confected litterbags (0.2 x 0.2 m) were collected at 7, 14, 28, 56 and 112 days after the cover crops management. In the residues...
Tipo: Thesis
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil tillage; Greenhouses and coverings.
Ano: 2012
URL: http://orgprints.org/29911/1/tese%20Carlos%20Alberto%20Casali.pdf

Auswirkungen reduzierter Hofdüngergaben im Bioackerbau
Provedor de dados: Organic Eprints
Autores: Dubois, David; Mäder, Paul; Fliessbach, Andreas; Strasser, Fredi.
Im Biolandbau ist das Idealbild eines gemischt wirtschaftenden Betriebes mit Vieh und Pflanzenbau weit verbreitet. Aus wirtschaftlichen Zwängen wird der Trend zu viehschwachen oder gar viehlosen Biobetrieben immer wichtiger. Untersuchungen der FAL und des FiBL im DOK-Versuch zeigen, dass sich, wenn die Bewirtschaftung nicht angepasst wird, die Reduktion der Hofdüngergaben ungünstig auf Ertrag, Unkrautbesatz und Bodenfruchtbarkeit auswirkt.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Weed management; Soil biology; Soil quality; Composting and manuring.
Ano: 2003
URL: http://orgprints.org/2726/1/dubois%2D2003%2Dreduzierte%2Dhofduengergaben.pdf

Find energien - fremtiden kommer
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.
Avisomtale og presentation fra videnskabsteater-forestilling om bæredygtig energi, som turnerede Sjælland rundt i marts 2012.
Tipo: Teaching resource
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2012
URL: http://orgprints.org/20906/1/20906a.pdf

Effects of vertical distribution of soil inorganic nitrogen on root growth and subsequent nitrogen uptake by field vegetable crops
Provedor de dados: Organic Eprints
Autores: Kristensen, H.L.; Thorup-Kristensen, K.
Information is needed about root growth and N uptake of crops under different soil conditions to increase nitrogen use efficiency in horticultural production. The purpose of this study was to investigate if differences in vertical distribution of soil nitrogen (Ninorg) affected root growth and N uptake of a variety of horticultural crops. Two field experiments were performed each over 2 years with shallow or deep placement of soil Ninorg obtained by management of cover crops. Vegetable crops of leek, potato, Chinese cabbage, beetroot, summer squash and white cabbage reached root depths of 0.5, 0.7, 1.3, 1.9, 1.9 and more than 2.4 m, respectively, at harvest, and showed rates of root depth penetration from 0.2 to 1.5 mm day)1 C)1. Shallow placement of soil...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2007
URL: http://orgprints.org/14749/1/14749.pdf

Nitrate leaching in an organic dairy/crop rotation as affected by organic manure type, livestock density and crop.
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Askegaard, M; Kristensen, K.
In dairy farming systems the risk of nitrate leaching is increased by mixed rotations (pasture/arable) and the use of organic manure. We investigated the effect of four organic farming systems with different livestock densities and different types of organic manure on crop yields, nitrate leaching and N balance in an organic dairy/crop rotation (barley – grass-clover – grass-clover – barley/pea – winter wheat – fodder beet) from 1994 until 1998. Nitrate concentrations in soil water extracted by ceramic suction cups ranged from below 1 mg NO3-N/l in 1st year grass-clover to 20-50 mg NO3-N/l in the winter following barley/pea and winter wheat. Peaks of high nitrate concentrations were observed in 2nd year grass-clover, probably due to urination by grazing...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 1999
URL: http://orgprints.org/142/1/Text.doc

Grössere Biomassen und aktivere mikrobielle Gemeinschaften  in Böden unter biologischer Bewirtschaftung eine globale  Meta-Analyse
Provedor de dados: Organic Eprints
Autores: Lori, M.; Symanczik, Sarah; Mäder, Paul; Gattinger, Andreas.
Population growth, climate change and other impacts challenge our food and farming system and provide arguments for further intensification in agriculture. One option is  eco-functional intensification through organic farming, an approach based on exploiting internal natural resources and processes for securing and improving agricultural productivity whilst minimizing negative environmental impacts. In this concept an active soil microbiota plays a crucial role. Thus, we conducted a literature  search followed by meta-analysis to quantify possible differences in key indicators for soil microbial abundance and activity in organic and conventional farming systems.  We integrated data from 57 studies including 148 pairwise comparisons and found significant...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31956/1/Gr%C3%B6%C3%9Fere%20Biomassen%20und%20aktivere%20mikrobielle.pdf

Spatial variability of symbiotic N2 fixation in grass-white clover pastures estimated by the 15N isotope dilution method and the natural 15N abundance method
Provedor de dados: Organic Eprints
Autores: Hansen, Jacob P.; Vinther, Finn P.
Aiming at estimating the spatial variability in N2 fixation, and to evaluate the appropriateness of the 15N isotope dilution (ID) method and the natural 15N abundance (NA) method in reflecting spatial variability under the influence of cattle grazing, the symbiotic N2 fixation in grass-white clover mixture was studied. At the Foulum site, where the ID method was used, differences in the climatic conditions between the two years of investigations caused a considerable difference in plant growth rates and proportion of clover. Consequently, the total N2 fixation in ungrazed reference plots was significantly less in 1998 than in 1997, being 5.9 and 12.5 g N m-2, respectively. In both years there was a wide range in concentration of inorganic N in the soil...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality; Soil biology; Pasture and forage crops.
Ano: 2001
URL: http://orgprints.org/172/1/Hansen_og_Vinther_2001.pdf

Nitrous oxide emissions from arable soil: Effects of crop rotation, tillage and manure management
Provedor de dados: Organic Eprints
Autores: Petersen, Søren O.
Soil carbon storage and nitrous oxide (N2O) emissions are both important for the greenhouse gas balance of agricultural soil, but difficult to verify under field conditions due to high spatial and temporal variability. Carbon stock changes are particularly elusive because they occur over decades, and future climate or management changes may revert current trends. Emissions of N2O from arable soil are derived mainly from the short-term (&lt;1 yr) turnover of crop residues, fertilizers and manure, which indicates that mitigation options may be found with a better understanding of management effects on soil C and N cycling and N2O emissions. This presentation will describe N2O studies within long-term crop rotation experiments that allow side-by-side...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil tillage; Air and water emissions; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/22016/1/22016.PDF

L'agricoltura bio accresce la fertilità del suolo e la biodiversità
Provedor de dados: Organic Eprints
Autores: Fliessbach, Andreas; Mäder, Paul; Pfiffner, Lukas; Dubois, David; Gunst, Lucie.
Risultati di 21 anni di ricerca DOK (Dossier No 1)
Tipo: Book
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage.
Ano: 2003
URL: http://orgprints.org/25233/1/1334-dok.pdf

Sulphate leaching and sulphur balances of an organic crop rotation on three Danish soils
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Olesen, J.E.; Askegaard, M.
Sulphate leaching may reduce the long-term possibility of maintaining the sulphur (S) supply of crops in low input farming systems. Sulphate leaching and S balances were investigated in an organic cereal crop rotation with barley (Hordeum vulgare), grass-clover (Lolium perenne/Trifolium repens and pratense), winter wheat (Triticum aestivum) and barley/pea (Pisum sativum) in mixture at three sites during the first 3 years after conversion to organic farming. Sulphate leaching decreased significantly during the 3 years, and the concentration of drainage water was lowered 1.85.5 times in the third year. Similarly, the S-content of the crops decreased significantly over the years, reflecting lower soil S availability. Sulphur application to spring barley at...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/159/1/S_paper.pdf

Balancing soil organic matter in organic agriculture - a theoretical approach
Provedor de dados: Organic Eprints
Autores: Brock, Dipl.geogr. Christopher; Leithold, Prof.Dr. Günter.
Soil organic matter (SOM) balances can assist sustainable organic matter management. Still, existing methods need to be revised, especially when applied in organic farming. A basic problem is the linear concept which seemingly does not reflect the effective dynamic.  Furthermore the relevance of SOM is dependent on the cultivation system and cultivation intensity, respectively. The importance of SOM as a nutrient source increases with diminishment of cultivation intensity, i.e. synthetic fertilizer application. Here turnover of organic matter becomes the key factor for nutrient supply.  Correspondingly, a higher SOM reproduction level that promotes increased SOM content and/or turnover should be an objective in organic farming.  Soil organic matter...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil.
Ano: 2006
URL: http://orgprints.org/7219/1/Vortrag_OrgCon2006_2.doc

PlantyOrganic; Voortgang 2013
Provedor de dados: Organic Eprints
Autores: Hospers-Brands, A.J.T.M.; Anema, D.; Bus, Michiel.
2013 was het tweede jaar waarin de systeemontwikkeling "PlantyOrganic" in praktijk is gebracht. Op de zes percelen zijn de gewassen geteeld die voorzien waren en zijn metingen verricht aan bodem en gewas. Met uitzondering van de aardappelen hadden in 2013 alle gewassen de voorvrucht die in het ontwerp was voorzien. De gebruikte meststoffen waren geheel afkomstig vanuit het eigen systeem, zoals in het ontwerp was voorzien. De totaal gegeven hoeveelheden stikstof waren ca. 45 % hoger dan waar in het ontwerp van uit is gegaan. De bodemstikstof is getoetst met metingen die in het stikstofmodel NDICEA zijn ingevoerd. De match tussen metingen en berekeningen is voldoende tot goed, met een enkele uitzondering. De gewassen groeiden goed, met hoge opbrengsten in de...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Crop husbandry; Soil.
Ano: 2014
URL: http://orgprints.org/28347/1/2972.pdf

Effects of organic versus conventional farming on different chemical soil parameters in Estonia
Provedor de dados: Organic Eprints
Autores: Sanchez de Cima, Diego; Reintam, Endla; Luik, Anne.
A five-year experiment results, have shown that fertilizer amendments are needed for preserving the nutrient balance in the soil. A combination of cattle and green manure, crop rotation and other organic farming practices, with chemical fertilizer amendments could suppose a sustainable solution for maintaining a correct nutrient balance in the soil in long term, better than both farming systems, conventional and organic, by separate.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2013
URL: http://orgprints.org/24599/1/24599.pdf

Relating N2O emissions from energy crops to the avoided fossil fuel-derived CO2 – a study on bioethanol and biogas produced from organically managed maize, rye, vetch and grass-clover
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Hauggaard-Nielsen, Henrik; Thomsen, Sune T.; Heiske, Stefan; Jensen, Morten; Schmidt, Jens Ejbye; Johansen, Anders; Ambus, Per.
Field emissions of N2O during cultivation of bioenergy crops may counterbalance a considerable part of the avoided fossil CO2 emissions that are achieved by fossil fuel displacement.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2010
URL: http://orgprints.org/18329/4/18329.pdf

Beworteling van grasland - een literatuurstudie:  Nutriëntenopname in relatie tot bewortelingsdiepte en - intensiteit; factoren en potentiële maatregelen die de beworteling beïnvloeden
Provedor de dados: Organic Eprints
Autores: Deru, Joachim; Eekeren, N. van; Boer, H. de.
Ondanks dat gras van nature een uitgebreid wortelstelsel heeft blijkt uit de bestudeerde literatuur dat ook bij grassen een diepere beworteling en verhoogde wortelintensiteit bijdraagt aan een betere nutriëntenbenutting.  De wortelgroei en -morfologie van grasland zijn zeer gevoelig voor omgeving- en managementfactoren. Interacties tussen die factoren en verschillen in reactie tussen grassoorten en -rassen maken dat in de literatuur niet altijd eenduidige verbanden zijn gevonden. Binnen de kaders die de bodem fysiek aan de beworteling stelt lijkt het mogelijk om grasland dieper en intensiever te laten bewortelen door managementmaatregelen. Maatregelen bij de inzaai, aangepaste bemesting, maai- en beweidingstrategieën zijn de belangrijkste instrumenten...
Tipo: Report
Palavras-chave: Pasture and forage crops; Nutrient turnover.
Ano: 2010
URL: http://orgprints.org/17850/1/17850.pdf

A comparison of soil quality and yield parameters under organic and conventional vineyard systems in Mediterranean conditions (West Turkey)
Provedor de dados: Organic Eprints
Autores: OKUR, Nur; KAYIKÇIOĞLU, Hüsnü; ATEŞ, Fadime; YAĞMUR, Bülent.
Soil chemical and microbial parameters are commonly used as soil quality indicators to evaluate sustainable land management in agroecosystems. The objective of this research was to evaluate the impact of organic and conventional management strategies on biological,chemicalandyieldparametersinvineyards(Vitisviniferacv.Sultaniseedless). Organic plots received a mixture of barley, vetch and broad bean (25þ35 þ75kg seed ha21) as green manure, and farmyard manure (15t ha21) every year. Inorganic fertilizers (NPK)andpesticideswereusedintheconventionalmanagedvineyards.Conventionaland mulch tillage methods were used in conventional and organic plots, respectively. Microbiological and chemical soil properties were determined in the soil samples which...
Tipo: Journal paper
Palavras-chave: "Organics" in general; Nutrient turnover; Farm nutrient management.
Ano: 2015
URL: http://orgprints.org/31092/1/NUR%20OKUR-ORTAK%20MAMAKLE.pdf

Jordliv (foredrag)
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun.
Organismer i jorda er viktige for næringsforsyning, jordstruktur og plantehelse.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/33000/1/Jordlivet%20Tingvoll%2012%20mars%202018%20Bl%C3%A6stadstudenter.pdf

Untersuchungen zu den Auswirkungen im ersten und zweiten Folgejahr nach einer einmalig variierten Bodenbearbeitung auf Ertragsbildung, Verunkrautung und Nitratauswaschung unter ökologischen Produktionsbedingungen
Provedor de dados: Organic Eprints
Autores: Häberle, Annette; Pekrun, Carola; Claupein, Wilhelm; Prade, Christoph; Thierfelder, Christian; Stahr, Karl.
Einleitung   Die Belastungen des Trinkwassers haben in den letzten Jahren stark zugenommen. Durch pflanzenbauliche Maßnahmen sollen die Nitratausträge aus landwirtschaftlich genutzten Flächen auf einem möglichst geringen Niveau gehalten werden. Reduzierte Bodenbearbeitung, späte Bearbeitungstermine und Begrünungsgebote stellen einen wesentlichen Teil dieser Maßnahmen dar. Ökologisch wirtschaftende Betriebe sind in ihren Anbauverfahren zur Förderung der Ertragsbildung, zur Unkrautregulation und zur Kontrolle von Schaderregern und Schädlingen auf eine zeit- und bedarfsgerechte Bodenbearbeitung angewiesen. Dies steht zum Teil im Widerspruch zu den oben genannten Regelungen. Ziel der Untersuchung ist es, zu überprüfen, ob bestimmte Bodenbearbeitungsverfahren...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Weed management; Soil tillage.
Ano: 2004
URL: http://orgprints.org/8991/1/HaeberlePbTagung04.pdf

Hvor bliver kvælstoffet af?
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
Ved opgørelse af kvælstofbalancer er der oftest en andel af det tilførte kvælstof, der ikke kan gøres rede for. Andelen varierer fra nogle få procent og i visse tilfælde op til halvdelen af det tilførte kvælstof. I det igangværende Føjo-projekt ØKOVAND er vi i gang med undersøgelser, der måske kan besvare, hvor noget af det resterende kvælstof bliver af.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2003
URL: http://orgprints.org/1839/1/e%2Dnews.doc

Residual nitrogen effect of a dairy crop rotation as influenced by grass ley management manure type and age
Provedor de dados: Organic Eprints
Autores: Hansen, J.P.; Eriksen, J.; Jensen, L.S.
Forecasting crop nitrogen (N) demand is important for maximising productivity and minimising losses to the environment and includes taking into account residual effects. The residual N effect was estimated in a dairy crop rotation (spring barley undersown with grass-clover, 1st and 2nd year ley, spring barley/pea undersown with ryegrass, oats undersown with ryegrass and fodder beets) with different management (grazed/cut) and manure type (slurry/deep litter) by anaerobic incubation and plant N-uptake in a pot experiment and in the field.  For comparison a 10-year-old grass-clover was included. Type of animal manure did not affect the residual N effect. Crop rotations with grazed grassland had a residual effect that on average was 13% higher than the same...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/4572/1/4572.doc

Effects of Farm Type and Different Intensities of Soil Tillage on Cash Crop Yields and Soil Organic Matter
Provedor de dados: Organic Eprints
Autores: Schulz, Franz; Brock, Christopher; Leithold, Günter.
An organic long-term field experiment has been carried out at the experimental station Gladbacherhof (Giessen University, Germany) since 1998 to survey the performance of agronomical, economical and ecological indicators dependant on farm type and tillage intensity. This article presents results on cash crop yields and changes in humus contents in the first two rotations of the experiment. It can be concluded that organic stockless farming without ley affects cash crop yields and demands special attention with regard to a sustainable humus management. Stockless farming with rotational ley on the other hand up to now showed a satisfactory performance when compared to a mixed farm type with livestock. As for the yields, reduced tillage systems could cope...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Soil tillage.
Ano: 2008
URL: http://orgprints.org/11990/1/Schulz_11990_ed.doc

Økologiske søer med ring i trynen
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
I Danmark er det almindelig praksis at ringe søer på friland. I flere andre lande, eksempelvis England og Holland, er det forbudt.   Ringens formål er at forhindre søerne i at rode for meget i jorden og ødelægge græsdækket. Et godt græsdække er vigtigt især af miljømæssige årsager, da det optager og tilbageholder næringsstoffer fra dyrenes gødning. Derudover kan græs udgøre en betragtelig del af søernes daglige energibehov, og det tyder på, at et godt græsdække kan medvirke til reduceret smågrisedødelighed.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/5480/1/5480.doc

Making the most of soil nitrogen
Provedor de dados: Organic Eprints
Autores: Goodlass, G; Hatch, D J; Shepherd, M A; King, J A; Cuttle, S P; Roderick, S; Briggs, S.
Optimising the amount of nitrogen captured by fertility building crops is essential for successful organic farming. This study used a combination of literature review, empirical measurements, model development and farmer participation to produce improved guidelines on making the most of soil nitrogen for organic farmers and growers. The main field experiment examined the impact of cutting and mulching on the build up of soil nitrogen. Recommendations to organic farmers from this part of the work, are that cutting and removing herbage during the fertility building phase promotes the highest amount of nitrogen fixation. However the highest soil residues occurred when clover was mulched in situ. Application of organic manures to legumes should also be avoided...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/10251/1/Making_the_most_of_soil_nitrogen.pdf

Management af kvælstof i grovfodersædskiftet
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
I kvægsædskiftet håndteres store mængder kvælstof, som dels stammer fra N-fiksering i kløvergræsmarker og fra husdyrgødning. Især udnyttelsen af N ophobet i græsmarker stiller store krav til management. Men med god driftsledelse er det dog muligt at optimere N-udnyttelsen og dermed minimere tabene, som primært sker i form af nitratudvaskning.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Dairy cattle; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/10045/1/10045.doc

The effect of catch crops on sulphate leaching and availability of S in the succeeding crop
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Thorup-Kristensen, K.
Sulphate leaching losses may reduce the long-term possibility of maintaining the S supply of crops in low input farming systems. In order to maintain a sufficient S supply in the future when further reductions in the atmospheric deposition are expected, it is important to reduce leaching losses of sulphate. As leaching primarily occurs during autumn and winter, a plant cover in this period must be expected to affect the quantity of S leached. It has been demonstrated that a catch crop succeeding the main crop can absorb nitrate from the root zone during autumn and winter and thereby reduce nitrate leaching (Thorup-Kristensen and Nielsen 1998). Similar beneficial effects of catch crops on sulphate leaching may be expected.   The ability of catch crops...
Tipo: Book chapter
Palavras-chave: Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/1776/1/1776.pdf

Biogasproduktionens effekter på parasitter, ukrudtsfrø og jordens mikroorganismer
Provedor de dados: Organic Eprints
Autores: Johansen, Anders; Carter, Mette S.; Hauggaard-Nielsen, Henrik; Nielsen, Henrik Bangsø; Andreasen, Christian; Hansen, Christian M.; Carlsgart, Josefine; Roepstorff, Allan.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Health and welfare.
Ano: 2010
URL: http://orgprints.org/18902/4/18902.pdf

Potential of Oil Palm Empty Fruit Bunch (EFB) as Fertilizer in Oil Palm (Elaeis guineensis L Jacq.) Nurseries
Provedor de dados: Organic Eprints
Autores: ADEOLUWA, DR OLUGBENGA O.; ADEOYE, PROFESSOR GIDEON O.
Oil palm is one of the major oil crops in the world. Oil palm empty fruit bunch (EFB) could serve as an alternative and cheaper organic fertilizer in oil palm farms. This study investigated the value of composts of different forms of EFB for raising oil palm in the nursery. The experiment, which covered the pre-nursery (&lt; 3 months) and nursery stages (3-13 months) used different EFB: cow dung ratios (100:0, 90:10, 80:20, 70:30 and 60:40) as compost as well as cow dung only and mineral fertilizer (NPKMg 12-12-17-2). The composts were added to the soil at the rate of 4.8 g N /plant. The experiment was laid out in a randomized complete block with three replicates. Data were collected on dry weight, nutrient concentrations, and soil pH changes. Oil palm...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/12808/1/AdeOluwa_12808.doc

Nyt dyrkningssystem til reduceret jordbearbejdning afprøves i Danmark
Provedor de dados: Organic Eprints
Autores: Hermansen, Nina.
Presentation of roller crimping in a new project at AU-Aarslev
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil tillage; Vegetables; Biodiversity and ecosystem services.
Ano: 2016
URL: http://orgprints.org/32026/1/Webversion%20Nyt%20dyrkningssystem%20til%20reduceret%20jordbearbejdning.pdf

The effect of tillage prctices on a leek crop's nitrogen utilization from a grass-clover sward
Provedor de dados: Organic Eprints
Autores: Willekens, Koen; Van Gils, Bert; De Vliegher, Alex; Delanote, Lieven; Beeckman, Annelies; Vandecasteele, Bart.
Adopting conservation agriculture practices in organic agriculture involves some risks and challenges. Nitrogen availability from a grass-clover ley for the subsequent leek crop was clearly affected by mode and timing of destruction of the grass-clover sward. Minor differences were found between a reduced tillage practice and conventional ploughing.
Tipo: Conference paper, poster, etc.
Palavras-chave: Production systems; Crop combinations and interactions; Nutrient turnover; Soil tillage; Air and water emissions.
Ano: 2014
URL: http://orgprints.org/23916/1/23916_MM.pdf

Afgræsningsmarkers eftervirkning
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
I nitratfølsomme vandindvindingsområder med landbrugsproduktion tilrådes af forsigtighedshensyn en grænseværdi på 50 mg nitrat pr. liter i nedsivningsvandet. Til trods for et lavere udvaskningspotentiale i økologisk end i konventionelt jordbrug, så har økologisk jordbrug ikke altid nitratkoncentrationer under grænseværdien – det gælder især på kvægbrugene. Årsagen er, at intensive afgræsningssystemer forøger tabsrisikoen pga. at drøvtyggere udskiller 75-95% af deres N-indtag i gødningen, og hovedparten af dette bliver afsat i marken under afgræsning. På den måde sker der en betydelig opbygning af N i afgræsningsmarker, og ved ompløjning frigives derfor hyppigt N i et omfang, som den efterfølgende afgrøde ikke er i stand til at udnytte med nitratudvaskning...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/3670/1/3670.doc

Effet de la fertilisation organique à base de farine de poisson sur 3 types de tomates conduite selon le mode biologique.
Provedor de dados: Organic Eprints
Autores: Beji, Sadreddine.
Le présent travail a étudié l’effet de la fertilisation organique à base de farine de poisson sur trois types de tomates conduites selon le mode biologique. L’essai s’est déroulé sous serre Delta 9 dans la région d’Agadir au sud ouest du Maroc. Trois doses de farine de poisson (73 g /plante, 110 g /plante et 140 g /plante qui représentent 170 kg d’azote par hectare, 255 N/ha et 360 N/ha) ont été appliquées sur trois types de tomates (grappe, ronde et cerise). Les résultats obtenus ont montré que la farine de poisson contribue à l’amélioration de la fertilité du sol notamment pour ce qui est de la teneur du sol en matière organique qui est passée de 0.64% avant l’installation de la culture à 1.32% après la récolte du 8ème bouquet, le taux des nitrates qui a...
Tipo: Thesis
Palavras-chave: Nutrient turnover; Vegetables; Composting and manuring.
Ano: 2003
URL: http://orgprints.org/6864/1/BejiSaderddine03.pdf

Evidence for denitrification as main source of N2O emission from residue-amended soil
Provedor de dados: Organic Eprints
Autores: Li, Xiaoxi; Sørensen, Peter; Olesen, Jørgen E.; Petersen, Søren O.
Catch crops, especially leguminous catch crops, may increase crop nitrogen (N) supply and decrease environmental impacts in cropping systems, but they may also stimulate nitrous oxide (N2O) emissions following spring incorporation. In this 28-day laboratory incubation study, we examined the carbon (C) and N dynamics and N2O evolution after simulated incorporation of residues from three catch crop species into a loamy sand soil, with variable soil moisture (40, 50 or 60% water-filled pore space (WFPS)). The catch crops include two leguminous (red clover and winter vetch) and one non-leguminous species (ryegrass). Plant material was placed in a discrete layer surrounded by soil in which the nitrate (NO3-) pool was enriched with 15N to distinguish N2O derived...
Tipo: Journal paper
Palavras-chave: Pasture and forage crops; Crop combinations and interactions; Nutrient turnover; Air and water emissions; Farm nutrient management.
Ano: 2015
URL: http://orgprints.org/30111/1/LXX3-2016%20SBB%20vol%2092%20p153-160.pdf

Veränderung von Mineralstoffgehalten in Böden und Pflanzen von Öko-Milchviehbetrieben in den letzten 14 bis 15 Jahren
Provedor de dados: Organic Eprints
Autores: Leisen, Edmund.
Most of the dairy farms have not applied purchased fertilisers since they changed to Organic farming. In this study it has been investigated, whether the plant nutrients in the soil have been decreased or increased during a period of 14 to 15 years. The studies have been made in Northern Germany. The P-contents in the plants remained constant, although the soil contents decreased. Within silages the K-contents increased and the Mg-contents remained unchanged. The purchase of fertilisers is not required in most cases, it is even unwanted in the case of potassium.
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Feeding and growth; Nutrient turnover.
Ano: 2013
URL: http://orgprints.org/21459/1/21459_Leisen.pdf

Kväveeffektivitet i ekologisk odling-slutsatser från gårdsstatistik
Provedor de dados: Organic Eprints
Autores: Linder, Janne.
Som ett led i Jordbruksverkets arbete med utvärdering av jordbrukspolitikens miljöeffekter har vi samlat in uppgifter om användningen av växtnäring i ekologisk odling. Telefonintervjuer genomfördes med cirka 1200 lantbrukare som helt eller delvis lagt om till ekologisk odling. Ur statistiken har vi gjort bedömningar av den totala växtnäringsförsörjningen i ekologisk odling. Vi har också gjort markbalanser för olika inriktningar. Ur detta har vi dragit slutsatser om uthålligheten och effektiviteten för den ekologiska odling vi har idag.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2005
URL: http://orgprints.org/7113/1/Nutrientstat.pdf

Dyrkning i planterester giver mindre ukrudt
Provedor de dados: Organic Eprints
Autores: Rystedt, Lotte.
News release from the Danish part of SoilVeg
Tipo: Newspaper or magazine article
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage; Vegetables.
Ano: 2017
URL: http://orgprints.org/33585/1/Dyrkning%20i%20planterester%20giver%20mindre%20ukrudt%20%C3%98kologi%20og%20Erhverv_%23622%2020171201.pdf

Bio fördert Bodenfruchtbarkeit und Artenvielfalt - Erkenntnisse aus 21 Jahren DOK-Versuch
Provedor de dados: Organic Eprints
Autores: Fliessbach, Andreas; Mäder, Paul; Pfiffner, Lukas; Dubois, David; Gunst, Lucie.
In leicht verständlicher Sprache fasst das Dossier die eindrücklichen Ergebnisse aus dem DOK-Langzeitversuch zusammen, in dem die biologisch-dynamische mit der organisch-biologischen und der konventionellen Anbaumethode verglichen werden. Ausgewertet und kommentiert werden die Erträge, Nährstoffzufuhr und -entzug, Bodenstruktur, Bodenleben und Artenvielfalt.
Tipo: Book
Palavras-chave: Nutrient turnover; Soil biology; Biodiversity and ecosystem services; Soil quality.
Ano: 2000
URL: http://orgprints.org/2913/1/1089-dok.pdf

Mit Zwischenfrüchten den Ertrag fördern
Provedor de dados: Organic Eprints
Autores: Grosse, Meike; Heß, Jürgen.
Das Beikrautunterdrückungspotenzial und das N-Lieferungsvermögen von drei verschiedenen Zwischenfruchtarten wurde in einjährigen Feldversuchen getestet. Das Ziel war es, die Zwischenfruchtarten hinsichtlich ihrer Eignung für pfluglose Systeme einzuschätzen. Die Versuche wurden auf dem Versuchsgut der Uni Kassel/Witzenhauen im Rahmen von TILMAN ORG durchgeführt. Es zeigten sich deutliche Unterschiede zwischen den verschiedenen Zwischenfruchtarten, sowohl in der Beikrautunterdrückung als auch in der N-Lieferung. Der Ertrag der nachfolgenden Hauptfrucht Hafer spiegelte dies wider.
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil tillage; Weed management.
Ano: 2016
URL: http://orgprints.org/30007/1/OEL178_34_35_Grosse.pdf

Zwischenfrüchte als Vorfrüchte für die Ertrags- und Qualitätsleistung von Mais und Kartoffeln
Provedor de dados: Organic Eprints
Autores: Kolbe, Hartmut.
Catch crops of different species (legumes (I), legume and non-legume mixtures (II), grasses (III), herbs (IV), without (V)) lead to yield increasing (potato tuber) and also to yield decreasing effects (silage maize) of the subsequent crops. Main reason for these results seems to be differences in the C/N rations, so that especially in organic farm-ing the catch crops have to plough under in a relatively young growth stage. Over this, most catch crop species have had small but significant increasing effects on the con-tents of N, P, K, Mg and further ingredients of the following crops.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Root crops.
Ano: 2007
URL: http://orgprints.org/9576/1/9576_Kolbe_Poster.pdf

Nährstoffbilanzen im biologischen Landbau
Provedor de dados: Organic Eprints
Autores: Berner, Alfred; Heller, Stefan; Mäder, Paul.
Mit Nährstoffbilanzberechnungen lassen sich Umweltleistungen im Bereich des Nährstoffeinsatzes in der Landwirtschaft aufzeigen. In der Schweiz ist die Erfüllung einer ausgeglichenen Bilanz Voraussetzung für staatliche Subventionen im Rahmen von Ökoprogrammen. Auf den Biobetrieben wird zur Nährstoffbilanzberechnung seit langem die sogenannte DGVE-Methode (Gemüsebau: LBL-Methode), auf integriert produzierenden Betrieben die sogenannte LBL-Methode eingesetzt (Tab.1). Von der staatlichen Biokontrolle wurde zunehmend eine einheitliche, für alle Betriebstypen einsetzbare Methode verlangt. Anhand von Praxisdaten sollten daher die oben genannten Methoden auf ihre Vergleichbarkeit überprüft werden. Um die Salden besser bewerten zu können, wurden sie mit den in...
Tipo: Book chapter
Palavras-chave: Composting and manuring; Nutrient turnover; Soil quality; Soil biology.
Ano: 1999
URL: http://orgprints.org/2908/1/berner%2Det%2Dal%2D1999%2Dnaehrstoffbilanzen.pdf

Pore characteristics and hydraulic properties of a sandy loam supplied for a century with either animal manure or mineral fertilizers
Provedor de dados: Organic Eprints
Autores: Schjønning, P.; Iversen, B.V.; Munkholm, L.J.; Labouriau, R.; Jacobsen, O.H.
Application of organic residues to soil is generally assumed to improve soil tilth. Only few studies have reported on the long-term effects on the more subtle aspects of soil porosity and no reports have considered the potential effects of organic amendments on the pore system in the subsoil. We sampled undisturbed soil cores (100 cm3 and 6280 cm3) in metal cylinders in differently fertilized plots in the long-term field experiments at Askov Experimental Station, Denmark. We selected the 0-60 cm soil layer of plots dressed for a century with either mineral fertilizers (labelled NPK) or animal manure (labelled AM). Both fertilization treatments were studied at two levels of nutrient application: 'normal' (labelled '1') and 1.5 times 'normal' (labelled...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Soil biology; Soil quality; Air and water emissions; Soil tillage; Composting and manuring.
Ano: 2005
URL: http://orgprints.org/5486/1/5486.pdf

Combination of undersown catch crops and row-hoeing for optimizing nitrogen supply and weed control in organic spring barley
Provedor de dados: Organic Eprints
Autores: Phan, Hong TT; Thorup-Kristensen, Kristian.
This is an early result of a field experiment where we aimed to optimize a row cropping system for organic cereal production with the use of undersown cover crops in combination with inter-row hoeing.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Biodiversity and ecosystem services; Denmark; Farm nutrient management; Knowledge management; Europe; Regulation.
Ano: 2015
URL: http://orgprints.org/33096/1/FSD5%20conference%20paper-Hong.pdf

Indtryk fra Plantekongres 2019
Provedor de dados: Organic Eprints
Autores: Mejnertsen, P.
Oplevelser og indtryk som kan bruges fagligt eller bare give stof til eftertanke
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2019
URL: http://orgprints.org/35352/1/2019%2002%20%C3%98IJ%20Plantekongres%20PTM.pdf

In situ carbon and nitrogen dynamics in ryegrass-clover mixtures: Transfers, deposition and leaching
Provedor de dados: Organic Eprints
Autores: Rasmussen, Jim; Eriksen, Jørgen; Jensen, Erik Steen; Esbensen, Kim H.; Høgh-Jensen, Henning.
Carbon (C) and nitrogen (N) dynamics in ryegrass-clover mixtures were investigated in field mezotrons installed to depths of 20, 40 and 60 cm and equipped with suction cups to collect percolating pore water. Ryegrass and clover leaves were cross-labelled with 14C- and 15N-enriched urea and the fate of the two tracers was studied for three months during summer. Transfer of 14C occurred mainly from ryegrass to clover, whereas the largest transfer of 15N was in the opposite direction. The average transfer of N from clover was 40% (±3.1, n=9) of N in ryegrass, whereas the fraction of N in clover donated by ryegrass was 5% (±1.2, n=9). The amount of 14C transferred from ryegrass to clover was 1.7% (±0.1, n=9) of the 14C-activity in the total aboveground biomass...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2007
URL: http://orgprints.org/10390/1/10390.pdf

Stickstoffnutzungseffizienz roher und anaerob vergorener  Güllen: Eine Studie mit unterschiedlichen 15N Methoden
Provedor de dados: Organic Eprints
Autores: Hutter, M.; Krebs, R.; Mayer, Jochen.
In agricultural biogas plants in Switzerland, in general 80 % or more of the digested organic matter is farmyard manure. Organic waste materials are used as cosubstrates. A field experiment with silage maize was conducted to test whether the apparent nitrogen use efficiency (NUE) of anaerobically digested slurries is higher than the one of raw slurries in the year of application. Two different 15N labelling  methods were used. In the 15N direct method, slurry NH4-N was labelled. In the indirect 15N isotope dilution method soil was pre-labelled by incorporating 15N labelled  clover-grass powder; maize received unlabelled slurry. In the 15N direct approach, raw slurries had the lowest apparent NUE of NH4-N, two anaerobically digested (AD)  slurries had an...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/31863/1/Stickstoffnutzungseffizienz%20roher%20und%20anaerob%20vergorener.pdf

Veileder til Jordlappen, Jordlappen Trinn 1 -kurs om jord.    Visual soil assessment (Jordlappen), main instruction
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun.
Jordlappen Trinn 1 er et dagskurs for gårdbrukere, landbruksrådgivere, studenter og andre. Kurset skal gi økt kunnskap om jordkvalitet med hovedvekt på jordstruktur og jordbiologi. Jordlappen består av en veiledning til 10 indikatorer og sjekkpunkter som gjøres ute i felt. Disse er jordstruktur, jordart, moldinnhold, omdanning av planterester, jordpakking, vanninfiltrasjon, plantevekst, rotvekst, biologisk aktivitet, antall og arter meitemark. Med spade og Jordlappen kan du selv sjekke jorda di etter kurset. Plansjer som tilhører finnes i det andre dokumentet.
Tipo: Teaching resource
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Soil; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/34216/1/Jordlappen%20Veileder%20Trinn%201%20Kurs%20om%20jord%20med%20forside%20final%202018%20PDF%20print.pdf

Effects of soil, root mycorrhization, organic and phosphate fertilization, in organic lettuce production
Provedor de dados: Organic Eprints
Autores: Brito, L Miguel; Sampaio, Áurea; Pinto, Rui; Mourão, Isabel; Coutinho, João.
The influence of organic and phosphate fertilization, and root mycorrhization, in organic lettuce production, was assessed with factorial treatment combinations of: soil type (SOP – soil from organic and SCP – soil from conventional production) and organic fertilizer (0, 2 and 4 t ha-1) in the first trial; mycorrhizal inoculation (mycorrhized and non-mycorrhized plants) and Gafsa phosphate (0, 100 and 200 kg P2O5 ha-1) in the second. Lettuce yield decreased in the SCP with the application of increasing rates of organic fertilizer due to the very high electrical conductivity (50.1 dS m-1) and lack of maturation of this fertilizer. However, the harmful effects of the organic fertilizer were minimized in the SOP. The application of increasing rates of Gafsa...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover; Vegetables; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/23031/1/23031%20Brito_MM.pdf

Minder en Anders Bemesten; resultaten van een vierjarig project over innovatieve bemesting.
Provedor de dados: Organic Eprints
Autores: van der Burgt, Geert-Jan; Timmermans, Bart; Staps, S.
In this report a summary is given from several experiments during three years at four farms. This summary focuses on yield; mineral balances and product quality are sometimes described. The overall soil quality descriptions can only be found in the complete reports which can be found in the reference list.   This project aimed at reduced manure applications in an adapted fertilization strategy in several farm types, realizing:  • Equal or higher yields  • Improvement of product quality  • Maintenance or improvement of sustainable soil fertility.  The results of the experiments at four farms are:  • At Joost van Strien’s farm it has been shown clear that the use of cut-and-carry fertilizers is a good option. The fertilizing value is as good as or better...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/21702/1/2010%2D032_LbP_Minder_en_Anders_Bemesten_4_jaar.pdf

Response of soil microbial biomass and community structures to conventional and organic farming systems under identical crop rotations
Provedor de dados: Organic Eprints
Autores: Esperschütz, Jürgen; Gattinger, Andreas; Mäder, Paul; Schloter, Michael; Fließbach, Andreas.
In this study the influence of different farming systems on microbial community structure was analyzed using soil samples from the DOK long-term field experiment in Switzerland, which comprises organic (BIODYN and BIOORG) and conventional (CONFYM and CONMIN) farming systems as well as an unfertilized control (NOFERT). We examined microbial communities in winter wheat plots at two different points in the crop rotation (after potatoes and after maize). Employing extended polar lipid analysis up to 244 different phospholipid fatty acids (PLFA) and phospholipid ether lipids (PLEL) were detected. Higher concentrations of PLFA and PLEL in BIODYN and BIOORG indicated a significant influence of organic agriculture on microbial biomass. Farmyard manure (FYM)...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; "Organics" in general; Soil quality.
Ano: 2007
URL: http://orgprints.org/13315/1/Esperschuetz-FEMSME-2007.pdf

Rhizodeposition of nitrogen by red clover, white clover and ryegrass leys
Provedor de dados: Organic Eprints
Autores: Høgh-Jensen, Dr Henning; Schjoerring, Dr Jan K.
Correct assessment of the rhizodeposition of N in grassland is essential for evaluation of the biological N2-fixation of legumes, for the total N balance of agro-ecosystems, and for the pre-cropping value of  grasslands. Using a leaf-feeding technique by which plants were 15N labelled while growing in mezotrons in the field, the rhizodeposition of N by unfertilised red clover, white clover and perennial ryegrass growing in pure stands was shown to amount to 64, 71 and 9 g N m-2, respectively, over two complete growing seasons. The corresponding values for red clover and white clover growing in mixtures with ryegrass were 89 and 32 g N m-2, respectively. The rhizodeposited N compounds, including fine roots, constituted more than 80% of the total...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Pasture and forage crops.
Ano: 2001
URL: http://orgprints.org/288/1/rhizo_deposition_final.pdf

Ecological and agronomic evaluation of crop rotations in organic farming systems
Provedor de dados: Organic Eprints
Autores: Bachinger, Dr. Johann; Stein-Bachinger, Dr. Karin; Fuchs, Sarah.
The integration of nature conservation measures in organic farming requires special know-ledge about potential goal conflicts between ecological and agronomic requirements. The aim of this paper is to introduce a generation and evaluation tool for crop rotations that allows an assessment of the complex interdependencies of different biotic and abiotic parameters. The interdisciplinary ‘Nature Conserva-tion Farm Brodowin’ project provides the experimen-tal basis for developing practical solutions and compromises in this context. Two generated six-course crop rotations are presented as examples of this approach. The results show the sensitivity of the evaluation tool and its usability for improving crop rotations with regard to nature conservation
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Biodiversity and ecosystem services.
Ano: 2006
URL: http://orgprints.org/7206/1/Bachinger.doc

Organic Farming on large farms with special reference to Eastern Germany
Provedor de dados: Organic Eprints
Autores: Bachinger, J.; Stein-Bachinger, K.
Nearly 3 % of the total arable land of the five new States of Germany have been converted to organic farming according to the AGÖL standards. The average farm size reaches about 200 ha, while the average size of organic farms in West Germany amounts to 30 ha. The structure of the large farms in East Germany contrasts with the organic farms in West Germany and are mainly characterised by a higher complexity of organisation, involving mainly blue collar workers and low livestock units.    Under the site and structural conditions of large organic farms in North-East Germany, for economic and environmental reasons, it is especially important to develop and apply special nutrient management strategies concerning the prediction and optimisation of nitrogen...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2000
URL: http://orgprints.org/980/1/980%2Dbachinger%2Dstein%2Dbachinger%2D2000%2Deastern%2Dgermany.pdf

Einfluss der Bearbeitungsintensität beim Umbruch von Leguminosen-Grasgemengen auf die N-Mineralisierung zur Folge-frucht Winterweizen
Provedor de dados: Organic Eprints
Autores: Wald, Fabian; Pekrun, Carola; Claupein, Wilhelm.
Einleitung  Leguminosen-Grasgemenge sind als N-Quelle in Fruchtfolgen des Organischen Landbaus von zentraler Bedeutung. Nach meist mehrjährigem Anbau wird der von den Leguminosen assimilierte Stickstoff mit dem Umbruch der Narbe durch die Mineralisation der organischen Substanz wieder freigesetzt. In der Praxis steht für eine Steuerung der Mineralisierung ausschließlich das Instrument der Bodenbearbei-tung zur Verfügung. Ziel dieser Untersuchungen war es, die Beeinflussbarkeit der N Mineralisierung durch eine Variation des Narbenumbruchs zu quantifizieren, um so eine Datengrundlage für die Modellierung der N-Dynamik in Abhängigkeit von der Bodenbearbeitung zu schaffen.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil tillage.
Ano: 2001
URL: http://orgprints.org/8987/1/WaldPbTagung01.pdf

Estimating legume N2 fixation in a grass-clover mixture of grazed organic cropping systems using two 15N methods.
Provedor de dados: Organic Eprints
Autores: Vinther, Finn P.; Jensen, Erik S.
The input of N through symbiotic N2 fixation (SNF) in grass-clover mixtures was determined in an organic cropping system for grazing during three years. The mixture of perennial ryegrass (Lolium perenne L.) and white clover (Trifolium repens L.) was established by undersowing in spring barley (Hordeum vulgare L.) and maintained subsequently for two production years. Dinitrogen fixation was determined using the 15N isotope dilution techniques and two labelling procedures. Using either pre-labelling of the soil with immobilisation of the 15N by addition of a carbon source before establishment of the grass-clover mixture or adding the 15N labelled ammonium to the established crop, resulted in similar estimates of the proportion of N derived from the...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality; Soil biology; Pasture and forage crops.
Ano: 2000
URL: http://orgprints.org/167/2/vinther_and_Jensen_2000.pdf

Societal responses for addressing nitrogen fertilizer needs: Balancing food production and environmental concerns
Provedor de dados: Organic Eprints
Autores: Palm, C.A.; Machado, P.L.O.A.; Mahmood, T.; Melillo, J.; Murrell, S.T.; Nymangara, J.; Scholes, M.; Sisworo, E.; Olesen, J.E.; Pender, J.; Stewart, J.; Galloway, J.N.
The N fertilizer accessibility and use situations have arisen primarily from a suite of national and international policies in agriculture and environmental sectors.  There is currently closer interaction among these sectors in Europe and to some extent in the US that strive to balance food production and pollution concerns.  When we look to the future, can countries that are beginning to intensify their agricultural production learn from the experiences of others? Are there measures that can be taken to stave off serious environmental problems before they occur? Where environmental problems do exist, how can future policies be crafted to solve these problems while ensuring food security and boosting economies?      Effective policies that focus on food...
Tipo: Book chapter
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/4669/1/4669.pdf

PlantyOrganic: Design and results 2012
Provedor de dados: Organic Eprints
Autores: Burgt, G.J.H.M.; Bus, M.C.
Increasingly strict legislation about fertilizer inputs and developing organic regulations are a strong  stimulation to optimize the internal nutrient dynamics of organic arable farms. In the project  “PlantyOrganic” , initialized by Biowad and realized at SPNA location Kollumerwaard, a challenging  arable system is developed and tested: 100% internal nitrogen supply without input of nutrients from  outside. In this report the design of the rotation and fertilizer scheme is presented and discussed, and  the starting conditions in spring 2012 are documented. The NDICEA nitrogen model is used to  explore the nitrogen dynamics. It is concluded that a 100% farm-own nitrogen supply can be  achieved with good production levels. The 2012 results gave no reason to...
Tipo: Report
Palavras-chave: Nutrient turnover; Air and water emissions; Soil; Farm nutrient management.
Ano: 2013
URL: http://orgprints.org/22839/1/2012-048%20LbP%20Planty%20Organic%20Design%20and%20results%202012.pdf

Do we pay proper attention to the subsoil C turnover?
Provedor de dados: Organic Eprints
Autores: Olesen, J.E.; Petersen, B.M.
The Kyoto Protocol allows carbon sequestration from changes in agricultural land use to be a mechanism for reducing anthropogenic greenhouse gas emissions. There is a specific requirement in the protocol for verification of the sequestration estimates, which may often involve the use of soil carbon simulation models and thus puts a large requirement on the validity of these models.     The commonly used soil organic matter models have been calibrated on the basis of measurements of topsoil C contents under the implicit assumption that there is negligible vertical transport of soil C. We demonstrate this assumption to be wrong, and that it may lead to large deviations when modelling long-term soil organic matter development. Therefore a model with a net...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/4670/1/4670.doc

Modellberechnungen für treibhausgasrelevante Emissionen und Senken in landwirtschaftlichen Betrieben Ost-Österreichs
Provedor de dados: Organic Eprints
Autores: Kasper, Martina; Freyer, Bernhard; Amon, Barbara; Hülsbergen, Kurt-Jürgen; Schmid, Harald; Friedel, Juergen K.
Landwirtschaftliche Nutzungssysteme sind in unterschiedlicher Weise an der Emission und Speicherung von klimarelevanten Gasen (CO2, CH4 und N2O) beteiligt. Die wesentlichen Projektziel sind die Bereitstellung von Daten- und Berechnungsgrundlagen für eine umfassende Darstellung von Profilen treibhausgasrelevanter Emissionen und Senken landwirtschaftlicher Betriebe in den acht Hauptproduktionsgebieten Österreichs. In jeder Region werden die beiden vorherrschenden Betriebstypen mit dem Programm REPRO modelliert, da es die Analyse der C-, N- und Energieflüsse im System Boden-Pflanze-Tier-Umwelt kombiniert. Als Beispiel werden die Ergebnisse des Hauptproduktionsgebietes "Nordöstliches Flach- und Hügelland" im Anschluss präsentiert.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Quality and evaluation of inputs.
Ano: 2011
URL: http://orgprints.org/17776/3/Kasper_17776.pdf

Humusmanagement und Humusbilanz hessischer Öko-Betriebe
Provedor de dados: Organic Eprints
Autores: Brock, Christopher; Oltmanns, Meike; Spiegel, Ann-Kathrin.
Mit dem Projekt „Humusmanagement und Humusbilanz hessischer Öko-Betriebe“ soll das Verständnis von Möglichkeiten und Grenzen des Humusmanagements unter Bedingungen des ökologischen Landbaus gefördert werden. Gleichzeitig bietet das Projekt Einblicke in die Humusbilanzierung und die daraus zu ziehenden Analysen und Bewertungen. Zielgruppen sind dabei gleichermaßen Praktiker, Berater und Wissenschaftler. Selbst in wissenschaftlichen Fachgruppen herrscht derzeit keine Einigung über die geeignete Methodik zur Humusbilanzierung und deren letztendliche Aussagekraft.  Diese Broschüre bietet Praktikern und Beratern deshalb einen Überblick über die Methodik und damit eine Handreichung für die wichtigsten Fragen zur Humusbilanz und -versorgung: Wie berechne und...
Tipo: Report
Palavras-chave: Crop combinations and interactions; Composting and manuring; Nutrient turnover; Biodiversity and ecosystem services.
Ano: 2013
URL: http://orgprints.org/22605/1/LLH_Humusmanagement.pdf

The effect of Penicillium bilaii on wheat growth and phosphorus uptake as a ected by soil pH, soil P and application of sewage sludge
Provedor de dados: Organic Eprints
Autores: Sánchez‐Esteva, Sara; Gómez‐Muñoz, Beatrice; Stoumann Jensen, Lars; Neergaard, Andreas de; Magid, Jakob.
Background: Penicillium bilaii may enhance P availability to plants, since it has been shown to increase plant growth and P uptake. There is currently increasing interest in using microorganisms to promote P mobilisation from organic P sources. An investigation was conducted to determine the e ects of P. bilaii on P uptake and growth of wheat in the presence and absence of sewage sludge. Two soils di ering in P contents and pH were used, as it was hypothesised that these a ect the e ciency of P mobilisation.  Methods: A pot experiment, in which wheat was grown for 35 days in a moderately acidic soil of low P status and a calcareous soil of moderate P status, was conducted. A full factorial design was used with two non‐sterilised soils, three amendments...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2016
URL: http://orgprints.org/30704/1/Sanches%20CBTA%202016.pdf

Millora de la conservació del sòl i l'ús de recursos en els sistemes hortícoles ecològics mitjançant la gestió de cultius que proporcionen serveis agroecològics
Provedor de dados: Organic Eprints
Autores: Sans Serra, Xavier F.
Els Cultius que proporcionen serveis agroecològics (ASC) s'introdueixen en els ecosistemes agrícoles per proporcionar o millorar serveis ecològics. Si la seva gestió és adequada, aquests cultius poden millorar la qualitat i fertilitat del sòl. A més, també contribueixen a mitigar les emissions de gasos d'efecte hivernacle i tenen una influència en l'aparició de flora arvense,  les malalties i les plagues dels cultius que els segueixen.  L'ASC es finalitza abans de la sembra dels cultius comercials, per a evitar la seva competència. La forma més estesa per acabar amb l'ASC és la incorporació al sòl mitjançant la llaurada (adob verd). No obstant això, la llaurada comporta un gran ús d’energia i genera pertorbacions en el sòl. Per aquests motius està rebent...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Nutrient turnover; Soil.
Ano: 2015
URL: http://orgprints.org/30536/1/P%C3%B2ster_SOILVEG_University%20of%20Barcelona.pdf

Bodenfruchtbarkeit im biologischen Landbau nach Hans-Peter Rusch
Provedor de dados: Organic Eprints
Autores: Paulsen, Hans Marten.
Bodenfruchtbarkeit entsteht durch physikalische, chemische und biologische Einflussgrößen. Im Zusammenspiel mit den örtlichen Klimabedingungen sind Wasserhaushalt, Lufthaushalt, sowie die Temperaturregulierung der Böden wesentliche Faktoren, die den Stoffumsatz im Boden und die Bedingungen für das Pflanzenwachstum bestimmen.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Crop husbandry.
Ano: 2011
URL: http://orgprints.org/19907/1/573_OEL_Paulsen_BioAustria_2011.pdf

Highly productive forage legume stands show no positive biodiversity effect on yield and N2-fixation
Provedor de dados: Organic Eprints
Autores: Dhamala, NR; Eriksen, J; Carlsson, G; Søegaard, K; Rasmussen, J.
Background and aims While N2-fixation in diversified grasslands including forage legumes and non-legumes has been widely studied, N2-fixation in swards containing only forage legumes remains unclear. In this study, we investigated N2-fixation in pure stands and mixtures of three forage legumes. Methodology N2-fixation, dry matter (DM) and nitrogen (N) yields were quantified in a field experiment for red clover (Trifolium pratense L.), white clover (Trifolium repens L.) and lucerne (Medicago sativa L.) pure stands and mixtures using the isotope dilution method. Results All three forage legume species derived most (around 85%) of their N from atmospheric N2-fixation (%Ndfa). However, no positive effect of species diversity was found in any of the mixtures....
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil.
Ano: 2017
URL: http://orgprints.org/31784/1/Dhamala%20et%20al%202017%20Plant%20and%20Soil.pdf

Pamuk Yetiştiriciliğinde Organik ve Konvansiyonel   Tarım Uygulamalarının Verim, Kalite ve Toprak Özellikleri Üzerine Etkileri
Provedor de dados: Organic Eprints
Autores: Erdal, Ülfet; Sökmen, Ömer; Üner, Kürşat; Bilir, Lamia; Göçmez, Selçuk; Okur, Nur; Okur, Bülent; Anaç, Dilek; Ongun, Ali Rıza; Ertem, Atila; Çakmak, Reşat.
Konvansiyonel ve organik tarım sistemlerini karşılaştırmak ve bu iki farklı sistemin, toprağın fiziksel, kimyasal, mikrobiyolojik dinamiği, lif kalitesi, verimdeki değişimi, yaprakların makro, mikro element kapsamları ve katkı kalıntının etkisini belirlemek amacıyla yapılmış bir çalışmadır. 2002-2008 yılları arasında 7 yıl süre ile Menemen’de pamuk+pamuk+buğday münavebe sisteminde yürütülmüştür. Organik parsellere toprak analiz sonuçları değerlendirilerek bitki besleme materyali olarak organik sertifikalı gübre, yeşil gübre kullanılmıştır. Konvansiyonel parsellere ise %21’lik amonyum sülfat ile %26’lık amonyum nitrat, fosforlu gübre olarak %43’lük triple süper fosfat ve potasyumlu gübre olarak %48-52’lik potasyum sülfat uygulanmıştır. Organik parsellerde...
Tipo: Book chapter
Palavras-chave: "Organics" in general; Soil quality; Nutrient turnover; Farm nutrient management.
Ano: 2010
URL: http://orgprints.org/22126/1/Organik%20tarim%20kapak.jpg

Comprendre l’agriculture grâce aux essais de longue durée
Provedor de dados: Organic Eprints
Autores: Fliessbach, Andreas.
Sur invitation du FiBL, d’Agroscope et de l’EPFZ, près de 90 chercheurs de 20 pays se sont réunis en conférence du 6 au 11 octobre au Monte Verità à Ascona TI pour les 40 ans du lancement de l’essai DOC, qui compare les systèmes agricoles biodynamique, organo-biologique et conventionnel. Plus de 40 exposés ont permis aux participants de présenter et de discuter les résultats de leurs essais de longue durée et de partager leurs connaissances sur l’importance des différents systèmes agricoles pour répondre aux défis de l’avenir.
Tipo: Newspaper or magazine article
Palavras-chave: Soil quality; Systems research and participatory research; Nutrient turnover.
Ano: 2019
URL: http://orgprints.org/36695/1/bioactualites_9_2019_fliessbach.pdf

Evaluación de la descomposición con el uso de bolsas de té
Provedor de dados: Organic Eprints
Autores: Tresch, Simon; Fliessbach, Andreas.
La comparación de la descomposición del té verde, un material de descomposición rápida, con el té rooibos, un material difícil de degradar, permite el cálculo del índice de bolsas de té. Este método proporciona información sobre la capacidad del suelo,como un organismo “vivo”, para ransformar los residuos orgánicos en nutrientes disponibles para las plantas y contribuir a la acumulación de humus en el suelo. Esta técnica es fácil de aplicar. Se coloca una bolsa de té en el suelo y se saca a los tres meses mirando cuánto material queda. Es fascinante descubrir el resultado del trabajo incesante de nuestros minúsculos ayudantes del suelo, y cómo esta labor proporciona nutrientes a una nueva generación de plantas.  English version available at...
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32465/1/tresch-fliessbach-2017-teabag-spanish.pdf

High yield and low N leaching with barley as a green crop for silage after grass-clover
Provedor de dados: Organic Eprints
Autores: Hansen, E.M.; Eriksen, J.; Vinther, F.P.
Danish organic farmers experience increasing difficulties with clover soil fatigue due to continuous cultivation of clover. A solution could be to undersow barley with Italian ryegrass after ploughing of grass-clover where the barley could be used as a green crop for silage (i.e., barley harvested at the beginning of heading), and Italian ryegrass could be used for cutting in autumn.   This method offers advantages not only for the farmer but also for the environment. When grass-clover is ploughed there is a high risk of N leaching. However, new field experiments show, that with the suggested method it is possible to reduce leaching to a minimum and simultaneously achieve a high production of roughage.
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/5474/1/5474.PDF

Sommerzwischenfrüchte für verbessertes Stickstoff- und Beikrautmanagement in ökologischen Anbausystemen mit reduzierter Bodenbearbeitung in den gemäßigten Breiten
Provedor de dados: Organic Eprints
Autores: Grosse, Meike; Heß, Jürgen.
Zwischenfrüchte spielen in ökologischen Anbausystemen mit reduzierter Bodenbearbeitung eine wesentliche Rolle. In dieser Übersichtsarbeit werden Ergebnisse aus einer ausführlichen Literaturrecherche hinsichtlich des N-Lieferungs- und Beikrautunterdrückungspotenzials von Zwischenfrüchten dargestellt. Die N-Aufnahme- und Biomasseertragsdaten verschiedener Zwischenfruchtarten und -artenmischungen werden tabellarisch wiedergegeben.  Sie unterliegen – auch innerhalb einer Art – einer großen Spannbreite. Die N-Aufnahme ist dabei weitgehend – auch artübergreifend – vom Biomasseertrag abhängig. Gründe für ein gutes N-Aufnahmevermögen werden diskutiert. Die Steuerung der Mineralisierung durch die Wahl des Einarbeitungszeitpunkts wird erörtert. Mechanismen der...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Weed management.
Ano: 2018
URL: http://orgprints.org/33427/1/jfk_2018_06_grosse_and_hess.pdf

Root development of beetroot, sweet corn and celeriac, and soil N content after incorporation of green manure
Provedor de dados: Organic Eprints
Autores: Christiansen, J.S.; Thorup-Kristensen, K.; Kristensen, H.L.
Root development in beetroot (Beta vulgaris L. ssp vulgaris var. conditiva Alef.), sweet corn (Zea mays L. convar. Saccharata Koern.) and celeriac (Apium graveolens L. var. rapaceum Gaud.) was followed during two growing seasons with the aim of describing the root systems and nitrogen (N) utilisation of the three vegetables. The crops were grown after incorporation of green manure either in the preceding Autumn or Spring. Beetroot reached a final root depth of 1.55 – 1.8 m. For sweet corn, the final root depths were 0.6 and 0.9 m, and, for celeriac, 0.45 and 0.6 m in the two years, respectively. The simple measure of average root depth reflected the depth to which soil mineral N was depleted over the season by each of the three vegetables. Autumn...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Vegetables.
Ano: 2006
URL: http://orgprints.org/10135/1/10135.pdf

Kvælstof forsvinder
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
Ved opgørelse af kvælstofbalancer er der oftest en andel af det tilførte kvælstof, der ikke kan gøres rede for. Andelen varierer fra nogle få procent og i visse tilfælde op til halvdelen af det tilførte kvælstof. I det igangværende Føjo-projekt ØKOVAND er vi i gang med undersøgelser, der måske kan besvare, hvor noget af det resterende kvælstof bliver af.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2003
URL: http://orgprints.org/1838/1/klumme.doc

Strip-cropping and recycling of waste for biodiverse and resource-efficient intensive vegetable production
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne Lakkenborg.
Core Organic Cofund project funded in 2018 about new agronomic methods to improve biodiversity and soil fertility in the organic production of vegetables.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Crop combinations and interactions; Composting and manuring; Nutrient turnover; Vegetables; Biodiversity and ecosystem services.
Ano: 2019
URL: http://orgprints.org/34431/3/AU-4%20Poster%20Stripcropping%20CORE%20Organic%20research%20seminar%2019-01-2019_34431.pdf

The Effect of Plant Growth Promoting Rhizobacteria on Barley Seedling Growth, Nutrient Uptake, Some Soil Properties, and Bacterial Counts
Provedor de dados: Organic Eprints
Autores: Cakmakci, Ramazan; Donmez, M.Figen; Erdogan, Ummugulsum.
This study was conducted with barley in greenhouse conditions in order to investigate seed inoculation with 5 different  N2-fixing (Bacillus licheniformis RC02, Rhodobacter capsulatus RC04, Paenibacillus polymyxa RC05, Pseudomonas putida RC06, and  Bacillus OSU-142) and 2 different phosphate-solubilising (Bacillus megaterium RC01 and Bacillus M-13) bacteria in comparison to  control and mineral fertiliser (N and P) application. Among the strains used in the present study, 6 plant growth promoting  rhizobacteria (PGPR) stimulated indole acetic acid (IAA) production and 3 of them stimulated phosphate solubilisation; all bacterial  strains fixed N2 and significantly increased the growth of barley. Available phosphate in soil was significantly increased by...
Tipo: Journal paper
Palavras-chave: "Organics" in general; Nutrient turnover; Soil.
Ano: 2007
URL: http://orgprints.org/31215/1/UE-1.pdf

Below-harvest biomass and N2 fixation in grass-clover at different cutting frequencies
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
The below-harvest nitrogen accumulating in stubble, stolons and roots is an important com-ponent in the N balance and the potential N losses in grass-clover cropping systems. The effects of cutting frequency on the total dry matter, total nitrogen and N2 fixation, including contributions from below-harvest production, were studied. In a greenhouse experiment with red and white clover plants, cutting reduced the above-ground dry matter production by 56-62% and the below-ground by 68-73%, compared to uncut plants. Similarly, in a two-year field study with ryegrass-white clover, simulated grazing reduced the harvested dry matter production by 6-19% and the below-harvest, i.e., stubble, stolons and roots, by 20-35% com-pared to normally mowed grass-clover....
Tipo: Book chapter
Palavras-chave: Nutrient turnover; Pasture and forage crops.
Ano: 2005
URL: http://orgprints.org/4163/1/4163.pdf

Breeding forb species for intensively managed multi-species mixtures
Provedor de dados: Organic Eprints
Autores: Cong, W.-F.; Meyer, V.; Klitgaard, G.; Grønbæk, O.; Eriksen, J.
Adding certain forbs such as chicory (Cichorium intybus L.), caraway (Carum carvi L.) or plantain (Plantago lanceolata L.) to grass-clover mixtures can further enhance or largely maintain the high productivity of grass-clover mixtures (Cong et al., 2018). This study aimed to screen varieties of three competitive forbs - chicory, caraway and plantain with high yield and quality performance, and to examine whether these varieties perform well when grown with traditional grass-clover mixtures.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2019
URL: http://orgprints.org/34983/1/EGF_Breeding_Cong%2520et%2520al.%5B1%5D.docx

Use of a mixture of biotite- and apatite-rich rock powder in a soil with inherent low soil fertility
Provedor de dados: Organic Eprints
Autores: Bleken, Ass. prof Marina Azzaroli; Krogstad, Prof. Tore; Speetjens, Koen; Heim, Ass. pref. Michael.
Long-term fertility of organically managed soils is challenged by repeated removal of plant nutrients through cash crops. The use of selected rock powders may contribute to maintain soil fertility. A pot trial with Italian ryegrass and white clover was used in order to study the potential of a biotite-rich and of an apatite-rich rock powder to maintain and improve the nutrient supply of organically managed soils.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality.
Ano: 2008
URL: http://orgprints.org/12402/1/Bleken_12402_ed.doc

Effect of vetch and broccoli in four-year rotation of organic cucurbitaceous and solanaceous vegetables under Mediterranean conditions
Provedor de dados: Organic Eprints
Autores: Bilen, Emre; Özsoy, Nazire; Nazik Bayram, Ceren Ayşe; Ünal, Mehmet; Kaya, Seçkin; Duman, İbrahim; Aksoy, Uygun; Al-Bitar, Lina.
Vegetables are among the main ingredients of the Mediterranean cuisine and thus enlarging organic local markets increase their demand for a diversity of vegetables. Long-term rotations based mainly on vegetables are rather rare in the Mediterranean countries. A four year experiment was carried out between 2006 and 2010 at Ege University Department of Horticulture in cooperation with CIHEAM Mediterranean Institute of Bari. And two different pre-crops, broccoli and vetch were tested under an organic management system as compared to fallow during the autumn-winter period. The summer main crops were rotated between solanaceous and cucurbitaceous vegetables as tomato (2007), zucchini (2008) pepper (2009) and eggplant (2010). The experiment aimed at recommending...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Weed management.
Ano: 2011

Første års undersøgelser af udbyttebegrænsende faktorer i økologisk vårbyg
Provedor de dados: Organic Eprints
Autores: Hermansen, S.
På trods, eller på grund, af et særdeles udfordrende dyrkningsår er der kommet nogle interessante resultater ud af arbejdet med at lokalisere hvilke næringsstoffer der begrænser udbytterne, specielt i økologisk vårbyg, men formodentligt generelt i økologi
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2019
URL: http://orgprints.org/35349/1/Oe-19-3855-Naeringsstofbalancer-i-okologiske-vaarbygmarker-LI.pdf

DOC-trail: 20 years of organic and conventional farming affect soil microbial properties
Provedor de dados: Organic Eprints
Autores: Oberholzer, H.R.; Mäder, Paul; Fliessbach, Andreas.
In a long-term field trial (DOC; = bio-Dynamic, bio-Organic, Conventional) at Therwil, Switzerland, agricultural production systems have been compared since 1978. The production systems differ mainly in the amount and form of fertiliser and plant protection strategy. Crop rotation and soil tillage were the same. In the most prominent systems soil microbial properties were investigated for the first time after two crop rotations in 1990. In 1998, after 3 crop rotations, soil microbial properties were investigated in all field plots.  Conclusions  Agricultural systems exert distinct effects on chemical and microbiological soil properties, prominently the bio-dynamic system with the application of composted manure. Part of the influence on microbiological...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality; Biodiversity and ecosystem services; Soil biology.
Ano: 2000
URL: http://orgprints.org/2933/1/oberholzer%2Det%2Dal%2D2000%2Ddoc.pdf

Evaluation of invasive Acacia species compost as alternative horticultural organic substrates
Provedor de dados: Organic Eprints
Autores: Brito, L Miguel; Reis, Mário; Mourão, Isabel; Coutinho, João.
The physical and chemical characteristics of composts of invasive Acacia longifolia and Acacia melanoxylon shrubs were evaluated to identify compost limitations as a substrate component. The bulk density was &lt;0.4 g cm-3 and the total pore space was &gt;85% of the total volume. Air capacity, the easily available water and buffering capacity were also within acceptable recommended values for horticultural substrates. With increased composting time the physical characteristics of the composts improved, but the same was not true for chemical characteristics. It is recommended to use these acacia composts in mixtures with peat which increases the content of organic matter and the C/N ratio, and decreases the pH and the electrical conductivity, of the final...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover; Biodiversity and ecosystem services.
Ano: 2014
URL: http://orgprints.org/23032/1/23032%20Brito_MM.pdf

Bağ Yetiştiriciliğinde Organik ve Konvansiyonel   Tarım Uygulamalarının Verim, Kalite ve Toprak Özellikleri Üzerine Etkileri
Provedor de dados: Organic Eprints
Autores: Erdal, Ülfet; Sökmen, Ömer; Üner, Kürşat; Bilir, Lamia; Göçmez, Selçuk; OKUR, Nur; Okur, Bülent; Anaç, Dilek; Ongun, Ali Rıza; Ertem, Atila; Çakmak, Reşat.
Bağ tarımı yapılan alanlarda konvansiyonel ve organik tarım sistemlerini karşılaştırmak ve bu iki farklı sistemin, toprağın fiziksel, kimyasal, mikrobiyolojik dinamiği, meyve verimindeki değişimi, yaprakların makro, mikro element kapsamları ve katkı kalıntının etkisini belirlemek amacıyla yapılmış bir çalışmadır. 2000-2008 yılları arasında tesadüf parselleri deneme deseninde, 9 yıl olarak, Manisa İlinin Salihli ilçesinin Poyrazdamları köyünde yürütülmüştür. Organik parsellere toprak analiz sonuçları değerlendirilerek bitki besleme materyali olarak organik sertifikalı gübre, yeşil gübre ve bağ budama artıkları kullanılmıştır. Konvansiyonel parsellere ise %21’lik amonyum sülfat ile %26’lık amonyum nitrat, fosforlu gübre olarak %43’lük triple süper fosfat ve...
Tipo: Book chapter
Palavras-chave: "Organics" in general; Soil quality; Nutrient turnover; Farm nutrient management.
Ano: 2010
URL: http://orgprints.org/22128/1/Organik%20Ba%C4%9F%20topra%C4%9F%C4%B1n%20s%C3%BCrd%C3%BCr%C3%BClebilirli%C4%9Fi.pdf

Roots below one meters depth are important for nitrate uptake by annual crops
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
The root depths of annual crops vary from 0.2 m to more than 2 m depending on root growth rate and length of growing season. However, studies of root growth and N uptake are often restricted to a depth of 1 m or less, as root biomass is assumed to be negligible below this depth. We have studied the importance of root growth and N uptake to a depth of 2.5 m in fully grown field vegetables and cover crops by use of minirhizotrons and deep point placement of 15N. These data were used for calculation of the potential rate of nitrate uptake below 1 m depth. The rate was found to be significant for the six crops studied. The effect of root depth on soil N left by an annual crop was simulated with the EU-rotate N model. The results showed that deep rooted crops...
Tipo: Book chapter
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Vegetables.
Ano: 2008
URL: http://orgprints.org/11459/1/11459.pdf

Effects of green manure storage and incorporation methods on nitrogen release and N2O emissions after soil application
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Sørensen, Peter; Petersen, Søren O.; Ma, Xiuzhi; Ambus, Per.
More efficient use of green manure-derived nitrogen (N) may improve crop yields and reduce environmental impacts in stockless organic arable farming. In this 3-month incubation study, we tested a new strategy where green manure leys are harvested and preserved until the following spring either as compost mixed with straw or as silage of harvested ley biomass. Grass-clover compost or silage was soil-incorporated by either simulated ploughing (green manure placed at 15 cm depth) or harrowing (green manure mixed into the upper 5-cm soil horizon) in order to assess treatment effects on net release of plant-available N, nitrous oxide (N2O) fluxes, and soil respiration. Grass-clover silage provided the highest net N release with similar results for the two...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2014
URL: http://orgprints.org/26717/13/Carter%20et%20al.%202014_BFOS_online.pdf

DOB Crop
Provedor de dados: Organic Eprints
Autores: de Visser, Richard.
Præsentation af avler-forsøg i DoubleCrop, erfaringer og resultater fra implementering i praksis
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Crop combinations and interactions; Composting and manuring; Nutrient turnover; Soil tillage; Vegetables; Root crops.
Ano: 2019
URL: http://orgprints.org/35466/1/DOBCROP%20pr%C3%A6sentation%20HortiAdvice%20marts%202019.pdf

Hvad begrænser udbytterne i økologisk vårsæd?
Provedor de dados: Organic Eprints
Autores: Hermansen, S.
De vigtigste udbyttebegrænsende faktorer i økologisk planteavl gennemgås
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2019
URL: http://orgprints.org/35354/1/Plantekongres.pdf

Managing Manure on Organic Farms
Provedor de dados: Organic Eprints
Autores: Shepherd, Mark; Gibbs, Paul; Philipps, Lois.
The booklet provides information on typical nutrient contents of livestock manures – from organic and ‘conventional’ sources; describes the availability of manure nutrients to the growing crop; outlines best management practices to optimise manure nutrient supply and outlines best management practices to optimise manure nutrient supply.   It draws on scientific research undertaken in the 1990, much of it in the UK, and most of it funded by DEFRA.
Tipo: Book
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/24819/1/Booklet4ManuresOrganic.pdf

Low nitrate leaching from long-term grass-clover
Provedor de dados: Organic Eprints
Autores: Eriksen, J.P.; Vinther, F.P.; Søegaard, K.
In the future there is expected to be a higher proportion of grass in the dairy crop rotation than today. Changes in the EU Common Agricultural Policy stipulate that subsidies should be decoupled from production. Pastures are thus better able to compete economically with other roughage/feedstuff sources.     Also, the development in farm size is dramatic and as dairy farms grow bigger, an increasing number of farms cannot use the entire crop rotation for grazing. The management of dairy cattle grazing becomes increasingly difficult with distance to the milking parlour, and on these farms we already experience grass-intensive rotations located close to the farm buildings.    Because of these conditions grass leys are expected to become older than the 2-3...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/5479/1/5479.PDF

Factors affecting the concentration of Zn, Fe and Mn in herbage from organic farms and in relation to dietary requirements of ruminants
Provedor de dados: Organic Eprints
Autores: Govasmark, Espen; Steen, Arvid; Bakken, Anne Kjersti; Strøm, Turid; Hansen, Sissel.
To obtain a general picture of the herbage zinc, iron and manganese concentrations and their relation to dietary requirements of ruminants on organic farms, we analysed soil and herbage samples from four regions in Norway. The soil median Zn, Fe and Mn concentrations were 0.18, 13 and 0.84 mg/L, respectively. The herbage median (10th-90th percentile) Zn, Fe and Mn concentrations (mg/kg) in herbage in the first cut were 19 (14-34), 50 (36-88), 34 (22-86) and in the second cut 21 (16-37), 84 (52-171) and 66 (36-205), respectively. The results of mixed model analysis of herbage Zn, Fe and Mn indicate that soil pH, soil texture, soil mineral concentration and botanical composition are the most influencing factors. We conclude that Zn, Fe and Mn did not limit...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farm nutrient management; Feeding and growth.
Ano: 2005
URL: http://orgprints.org/6110/1/ZnMnFe_artikkel.pdf

Pas på kalium og svovl i økologiske sædskifter
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Askegaard, M.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/224/1/Landsbladet_agro2.doc

Meitemarkens rolle i omdanning av planterester
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun; Meisingset, Erling L.
Ulike arter meitemark har forskjellig adferd og ulik betydning for omdanning av planterester. Stor meitemark, skogsmeitemark og kompostmeitemark spiser store mengder planterester og heller lite jord. Grå, rosa og delvis lang meitemark spiser mer omdannede planterester og større andel jord. Grå, stor, lang og rosa meitemark graver ganger av ulike typer i jorda. Meitemarkens fordøyelsessystem har krås til å "knuse" og blande jord og planterester. Omdanningen av planterester er også et tett samspill mellom mark og mikroorgansimer. God smakelighet og passe størrelse på planterestene er positivt for marken. Meitemarken utnytter ikke selv all næringen som er i planterestene. Ekskrementene er derfor fulle av næring for planterøtter og jordlivet ellers. God...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology.
Ano: 2005
URL: http://orgprints.org/6835/1/Gr%C3%B8nnForskning_mm_planter_m_ref_05.pdf

Impact of leguminous living mulch on soil microbial biomass and activity in different European climatic zones
Provedor de dados: Organic Eprints
Autores: Marinari, S.; Papp, R.; Marabottini, R.; Moscatelli, M.C.
The positive effect of Living Mulch on soil microbial biomass and its activity was more evident in the Mediterranean environment starting from the main crop planting (t1) . Conversely, in the Northern site the effect of LM was significant in not tilled soil at the main crop harvesting (t2). These preliminary results establish the bases for the final evaluation at end of the project, on the importance of pedoclimatic conditions to prove the effect of Living Mulch at different tillage levels.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Soil.
Ano: 2015
URL: http://orgprints.org/29640/1/poster%20Soil%20Leguminous%20LM%20Norway.pdf

Controlled traffic farming increases root growth, crop and soil nitrogen in vegetable cropping systems
Provedor de dados: Organic Eprints
Autores: Hefner, M.; Labouriau, R.; Nørremark, M.; Kristensen, H. L.
Results from field trials on sandy and sandy loam of controlled traffic farming
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover; Soil tillage; Air and water emissions; Vegetables; Root crops.
Ano: 2018
URL: http://orgprints.org/35459/1/20th%2BNitrogen%2BWorkshop_2018_Final%2BProceedings%287%29.pdf

Untersuchungen zum Einsatz von Blattdüngern im ökologischen Obstbau - Status Quo Analyse und Prüfung von Blattdüngern
Provedor de dados: Organic Eprints
Ziel der Status Quo Analyse war es, die zur Zeit üblichen Boden- und Blattdüngungsstrategien mit Hilfe von Blattanalysen zu überprüfen. Bei den Sorten 'Elstar' und 'Topaz' wurden auf jeweils 3 Betrieben im Mittleren Neckarraum dazu Erhebungen zu Fruchtansatz, Ertrag, Fruchtqualität und Nährstoffversorgung der Blätter durchgeführt. Häufig wurde ein Mangel bei Mangan und Zink festgestellt. Die Sorte 'Topaz schien außerdem Kalium und Bor schlechter aufzunehmen. In 3 Exaktversuchen wurden außerdem verschiedene Blattdünger geprüft. Teilweise konnten positive Effekt bei Phytoamin und Wuxal Ascofol festgestellt werden. Allerding beeinflußte das betriebsspezifische Ertragsniveau und der Wuchscharakter der Bäume das Verhältnis wichtiger Hauptnährstoffe zu einander....
Tipo: Project description
Palavras-chave: Nutrient turnover; Fruit and berries.
Ano: 2023

Einfluss verschiedener Zwischenfrüchte als Vorfrüchte für die Ertrags- und Qualitätsleistung von Silomais und Kartoffeln
Provedor de dados: Organic Eprints
Autores: Schliesser, Ingeborg; Schuster, Martina; Kolbe, Hartmut.
Mehrjährige Gefäß- und Feldversuche des Landesamtes für Umwelt, Landwirtschaft und Geologie in Sachsen zeigen, dass Zwischenfrüchte zu höheren Erträgen bei Silomais oder Kartoffeln führen können. Zudem konnte bei bestimmten Zwischenfrüchten eine deutliche Verringerung des Nitratgehalts im Boden nachgewiesen werden.  Insbesondere der Anbau von Weißem Senf, Sommerraps, Phacelia und Welschem Weidelgras verringerte den Nitratgehalt um bis zu 75 Prozent des Bodenausgangsgehaltes. Ähnliche Wirkung zeigten das Landsberger Gemenge und ein Gemenge aus Phacelia, Buchweizen und Platterbse. Damit können Zwischenfrüchte gut zur Verringerung des Nitrateintrags ins Grundwasser beitragen.    Bei reinen Leguminosen ist die Nitrataufnahme aus dem Boden aufgrund ihrer...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Composting and manuring; Nutrient turnover; Root crops.
Ano: 2010
URL: http://orgprints.org/19351/1/Z%2DFruechte_Oekolandbau10.pdf

Soil respiration, nitrogen mineralisation and uptake in barley following cultivation of grazed grasslands
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Jensen, L.S.
Soil tillage was studied as a strategy to synchronise N mineralization with plant demand following ploughing of two types of grazed pastures (ryegrass/white clover [Lolium perenne/Trifolium repens] and pure ryegrass). The swards were either rotovated and ploughed or only ploughed. Soil respiration, as determined by a dynamic chamber method, was related to net N mineralization and to plant N uptake in a subsequent spring barley crop (Hordeum vulgare). Diurnal variations in temperature were important for the CO2 flux and care must be taken that temperatures during measuring periods are representative of the daily mean. Soil tillage increased the CO2 flux considerably compared to untilled soil with total emissions of 2.6 and 1.4 t carbon ha-1, respectively,...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/153/1/10330139.pdf

National and regional net nitrogen balances in Finland in 1990-2005
Provedor de dados: Organic Eprints
Autores: Salo, Tapio; Lemola, Riitta; Esala, Martti.
Nitrogen (N) balance has been identified as a principal agri-environmental indicator. In addition to national N balances, calculation of N balances for different agricultural regions is also recommended. In this study, national and regional net N balances for Finland were calculated. The net N balance is the result of deducting the NH3-N losses from manure and fertilisers from the gross N balance. The N balance calculation was based on data for Finnish Rural Centres and calculated per cultivated hectare. The main data inputs for the calculations were agricultural and environmental statistics, coefficients of manure excretion and crop N concentrations. Finnish national net N balance decreased from 90 kg ha–1 in 1990 to 50 kg ha–1 in 2005. The decrease in...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2007
URL: http://orgprints.org/16896/1/salo.pdf

Long-term effect of different soil management systems and winter crops on soil acidity and vertical distribution of nutrients in a Brazilian Oxisol
Provedor de dados: Organic Eprints
Autores: Calegari , A.; Tiecher, T.; Hargrove, W. L.; Ralisch, R.; Tessier , D.; Tourdonnet, S.; Guimarâes, M. F.; Santos, D. R.
“Strategies” to sustain crop productivity by reducing the fertilizer and lime demands must be developed. The use of plant species that use more efficiently the soil nutrients and tillage systems that provide nutrients accumulation in more labile forms are prerequisites for sustainable agroecosystems. This study aimed to evaluate the long period effect of cultivating different winter species under different soil management systems on vertical distribution of soil nutrients and the soil acidity distribution in soil profile. The experiment was established in 1986 with six winter treatments (blue lupine, hairy vetch, oat, radish, wheat and fallow) under conventional tillage (CT) and no-tillage (NT) in a very clayey Rhodic Hapludox in Southern Brazil. As a...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil tillage.
Ano: 2013
URL: http://orgprints.org/29744/1/Long-term%20effect%20of%20different%20soil%20management%20systems%20and%20winter%20crops%20on%20soil%20acidity%20and%20vertical%20distribution%20of%20nutrients%20in%20a%20Brazilian%20Oxisol.pdf

Simulating Root Density Dynamics and Nitrogen Uptake – Can a Simple Approach be Sufficient?
Provedor de dados: Organic Eprints
Autores: Pedersen, Anders; Zhang, Kefeng; Jensen, Lars Stoumann; Thorup-Kristensen, Kristian.
The modeling of root growth in many plant–soil models is simple and with few possibilities to adapt simulated root proliferation and depth distribution to that actually found with different crop species. Here we propose a root model, developed to describe root growth, root density and nitrogen uptake. The model focuses on annual crops, and attempts to model root growth of different crop species and row crops and its significance for nitrogen uptake from different parts of the soil volume.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Root crops; Farm nutrient management; Vegetables.
Ano: 2007
URL: http://orgprints.org/10744/1/10744.pdf

Bewertung von Bodenfruchtbarkeit, Stickstoffhaushalt und Ertrag.
Provedor de dados: Organic Eprints
Autores: Burgt, Geert-Jan H.M.; Rietema, C.; Bus, M.
Dieser Bericht ist die Übersetzung der Publikation "Planty Organic 5 jaar: evaluatie van bodem-vruchtbaarheid, stikstofhuishouding en productie", die um ein kurzes Kapitel über die nach der Veröffentlichung gewonnenen Ergebnisse der Jahre 2017 und 2018 ergänzt wurde. Vom ursprünglichen Bericht lag bereits eine englische Fassung vor.    Der Jahresbericht 2017 wurde in niederländischer Sprache publiziert; der Jahresbericht 2018 ("Planty Organic – voortgang 2018") ist, ebenfalls als niederländische Datei, auf www.louisbolk.nl zu finden.    Der ursprüngliche Bericht wurde vollständig und unverändert übersetzt. Zusätzlich wurde ein Schlusskapitel angehängt, Kapitel 8, in dem der Frage nachgegangen wird, ob sich die in der Bewertung der Jahre 2012 – 2016...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Soil.
Ano: 2019
URL: http://orgprints.org/36534/1/3428.pdf

Phosphat-Mobilisierung durch Haupt- und Zwischenfrüchte nach Düngung von weicherdigem Rohphosphat im ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Steffens, Diedrich; Stamm, Roland; Leithold, Günter; Schubert, Sven.
Obwohl die agronomische Wirksamkeit von weicherdigem Rohphosphat gering ist, wird weicherdiges Rohphosphat im organischen Landbau gedüngt. Das Ziel des Projektes war es in Feld- und Gefäßversuchen in einer Fruchtfolge 2002/2003 und 2003/2004 zu prüfen, ob weicherdiges Rohphosphat von phosphataneignungseffizienten Pflanzen (Weißlupine und Ackerbohne) für phosphataneignungsineffiziente Pflanzen (Spinat und Mais) mobilisiert wird. Es zeigte sich, dass die P-Aufnahme von Spinat in einer Fruchtfolge mit Weißlupine und Ackerbohne höher war als in einer Fruchtfolge mit Sommerweizen. In Gefäßversuchen führte die Applikation von neuem Thomasphosphat (CaHPO4) zu einer höher Phosphataufnahme der Pflanzen als Rohphosphat.
Tipo: Report
Palavras-chave: Crop combinations and interactions; Composting and manuring; Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/17240/1/17240%2D02OE424%2Duni_giessen%2Dsteffens%2D2003%2Dphosphatmobilisierung.pdf

University of Nottingham: stockless organic experiment
Provedor de dados: Organic Eprints
Replicated experiment, set up in 2000 to investigate conversion strategies for stockless organic systems.
Tipo: Research facility description
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2023

Post-harvest effect of cover crops on creeping thistle Circium arvense
Provedor de dados: Organic Eprints
Autores: Thi Thuy, Hong Phan; Thorup-Kristensen, Kristian.
Cover crops move nitrogen (N) to the top soil. This enhances the N uptake of the succeeding barley crop, especially at early growth stages, and limits the access of the thistle to the N from the subsoil. The autumn tillage for perennial weed control, in contrast, provides a N distribution favorable for the uptake by thistles rather than barley crop. The evidence of post-harvest effect of cover crops on the N status of C. arvense gives a better understanding of their roles in weed control.
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions; Composting and manuring; Nutrient turnover; Weed management.
Ano: 2016
URL: http://orgprints.org/31543/1/Post-harvest%20effect%20of%20cover%20crops%20on%20creeping%20thistle%20Circium%20arvense.pdf

Field homogeneity in OSCAR-MEE
Provedor de dados: Organic Eprints
Autores: Marinari, S.; Papp, R.; Sripada, U.; Thami-Alami, I.; Campiglia, E.; Pearce, B.D.; Bergkvist, G.; van der Heijden, M.; Baresel, J.P.; Finckh, Maria R.
Soil properties at the beginning of the MEE (Multi Environment Experiments) were statistically analyzed in order to verify the field homogeneity. The initial soil properties represent the starting point to interpret the effect of CC and LM on soil fertility during crop cycle.Soil properties of the fields were quite homogeneous at the beginning of crop cycles (first and second).  The soil properties of the experimental fields in the selected areas showed a wide variety of pedons to be used for the comparison of CC and LM effect in different climate zones.  Soils from the Northern European sites are more acid and richer of nutrients and organic matter with respect to the soils in Southern sites.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Soil biology; Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/29641/1/poster%20OSCAR%201.pdf

Reducing nitrogen and potassium losses during farmyard manure composting by improving composting techniques
Provedor de dados: Organic Eprints
Autores: Raupp, Dr Joachim; Oltmanns, Meike.
Based on literature findings the paper deals with the question, which circumstances are connected with nutrient losses and by which means this can be reduced. Nitrogen rich, particularly ammonia rich manures seem to be predestined to have high N losses. Some recommendations concerning C:N ratio, turning of the heaps, how to avoid seepage produc-tion etc. can be derived. Strategies are suggested how to achieve favourable composting conditions
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2006
URL: http://orgprints.org/7529/1/C%2Dode3.doc

Stickstoffverfügbarkeit von Komposten im Ökolandbau
Provedor de dados: Organic Eprints
Autores: Lammert, Benjamin; Weissbart, Joseph; Groschupp, Christine; Vetter, Dr. Reinhold; Berner, Alfred; Leclerc, Blaise; Schaub, Christiane.
Das Projekt zielt darauf ab, die Stickstofffreisetzungsdynamik der im ökologischen Landbau gebräuchlichsten Komposte besser abzuschätzen durch Ermittlung von Beziehungen zwischen Kompostierungsverfahren und agronomischem Potential (insbesondere Stickstoffver-fügbarkeit).  Es wird versucht, den landbaulichen Wert von Komposten anhand von einfachen Kriterien zu kennzeichnen. Vorgeschlagen wird ein 3-stufiges Analysenverfahren:  1. Sich vergewissern, dass der Kompost nicht mehr aktiv ist (Stabilität).  2. Den Reifegrad des Komposts messen (Schätzung der produzierten Menge an Humusverbindungen).  3.Bewertung der Qualität der produzierten Humusverbindungen (Kationenaustauschkapazität)  Desweiteren werden Beiträge geliefert zu technischen (Einfluss von Bodentyp,...
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/2448/1/121abkd.pdf

Overwintering grass-clover as intercrop and moderately reduced nitrogen fertilization maintain yield and reduce the risk of nitrate leaching in an organic cauliflower (Brassica oleracea L. var. botrytis) agroecosystem
Provedor de dados: Organic Eprints
Autores: Xie, Yue; Kristensen, Hanne Lakkenborg.
Cauliflower (Brassica oleracea L. var. botrytis) has high nitrogen (N) demand during growing, but due to its low N use efficiency and N-rich residues, it may cause N losses by leaching after harvest. A field experiment was conducted to investigate the effect of overwintering grass-clover as an intercrop and moderately reduced N fertilization on organic cauliflower yield and risk of nitrate leaching. The experiment tested sole-cropped (S) and intercropped (I) systems using a substitution design and two N fertilizer rates (180 and 230 kg N ha−1). To investigate the competition between cauliflower and grass-clover, cauliflower grown alone with empty grass-clover rows (Semp) and grass-clover grown alone with empty cauliflower rows (GCemp) were included. The...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Air and water emissions; Vegetables.
Ano: 2016
URL: http://orgprints.org/32019/1/Xie%20%26%20Kristensen%202016%20Scientia%20Hort.pdf

Simulating crop production and nitrate leaching losses from organic arable crop production
Provedor de dados: Organic Eprints
Autores: Olesen, J.E.; Berntsen, J.
Crop models can be powerful tools to analyse the effect of changes in management of cropping systems on productivity and environmental impact, provided the models have been thoroughly tested. The FASSET model was found to adequately reproduce effects of management (manure and catch crops) and of site (soil and climate) on crop yields and nitrate leaching from a 4- crop rotation with a grass-clover green manure crop in one out of four years. Scenario analyses shown that the nitrate leaching increased relatively more with increasing N fixation in the grass-clover than did the crop yields. The yields could be increased and the nitrate leaching reduced by using catch crops and/or using the grass-clover for biogas instead of a green manure, assuming that the...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Production systems.
Ano: 2004
URL: http://orgprints.org/4673/1/4673.doc

Berichte aus dem Ökolandbau
Provedor de dados: Organic Eprints
Autores: Schuster, Martina; Kolbe, Hartmut; Bauer, Katharina; Jäckel, Ulf.
Der erste Teil des Heftes (M. Schuster &amp; H. Kolbe) handelt über den Einfluss von Stroh- und Gründüngung auf die Ertrags- und Qualitätsleistung von Hafer in viehlosen Anbausystemen des ökologischen Landbaus. Es wird der Einfluss von Stroh- und Gründüngung auf den Ertrag und die Qualität von Öko-Hafer untersucht. 3-jährige Feldversuche zeigen, dass Strohdüngung einen leichten Ertragsrückgang bei Hafer zur Folge hat. Gründüngung dagegen führt sowohl mit Leguminosen als auch mit Gras zu deutlichen Mehrerträgen.  Im zweiten Beitrag (K. Bauer &amp; U. Jäckel) werden 10 Jahre Ökolandbau im Lehr- und Versuchsgut Köllitsch in Sachsen ausgewertet. Dabei zeigt sich, dass trotz negativer Nährstoffbilanzen für N, P, K und Mg lediglich bei K eine Unterversorgung...
Tipo: Newspaper or magazine article
Palavras-chave: Production systems; Crop combinations and interactions; Composting and manuring; Nutrient turnover; Soil tillage.
Ano: 2015
URL: http://orgprints.org/29537/1/Stroh_LfULG_Schriftenreihe_Heft_2_2015.pdf

Fosfor og kalium holdes levende i grøngødninger og efterafgrøder
Provedor de dados: Organic Eprints
Autores: Korsgaard, Maren.
Efterafgrøder bruges især til at bevare kvælstoffet i de øvre jordlag og hindre det i at vaske ud. Men efterafgrøder opsuger alle næringsstoffer og forebygger dermed også udvaskning af eksempelvis svovl og kalium. Fosfor udvaskes ikke så let, men kan blive bundet så hårdt i jorden, at det ikke er tilgængeligt for planterne. En grøn jord med plantevækst vil forebygge at dette sker, idet fosforet indbygges i planterne og dermed bevares på tilgængelig form til den efterfølgende afgrøde.
Tipo: Report chapter
Palavras-chave: Composting and manuring; Nutrient turnover; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/27264/6/27264.pdf

Improved Phosphorus Recycling in Organic Farming: Navigating Between Constraints
Provedor de dados: Organic Eprints
Autores: Möller, Kurt; Oberson, Astrid; Bünemann, Else K.; Cooper, Julia; Friedel, Jürgen K.; Glaesner, Nadia; Hörtenhuber, Stefan; Løes, Anne-Kristin; Mäder, Paul; Meyer, Gregor; Müller, Torsten; Symanczik, Sarah; Weissengruber, Lina; Wollmann, Iris; Magid, Jakob.
Phosphorus (P) is an essential element for all living organisms. At the current rate of extraction, global reserves of mineable deposits will be exhausted within the next few centuries. This publication aims to summarize the current knowledge on P recycling for organic farming. The evaluation of recycled P fertilizers (RPFs) includes (i) a chemical characterization, (ii) assessment of their plant P availability and added effects in the soil, (iii) life cycle assessments, (iv) a risk assessment of their long-term impacts on soil pollution, and (v) the compilation of other environmental impacts of different treatment approaches to produce RPFs.  The highest nutrient recovery rates for P are achieved by rather simple process approaches of P recycling, while...
Tipo: Book chapter
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/32661/1/Moeller-etal-2018-Advances_in_Agronomy-vol147-chapter4-p159-237-article-in-press.pdf

Monitoring and comparing cover crop performances
Provedor de dados: Organic Eprints
Autores: Casagrande, Marion.
The acquired information on biomass production and expected nutri-ent release of cover crop species and/or cultivars will provide greater certainty for the selection of suitable varieties and the estimation of fulfilment of the nutrient requirements of the subsequent crop.    Method and results of practical testing  MERCI is an easy-to-use tool which simplifies:  • Estimation of the dry matter produced per hectare (tonnes per hectare);  • Calculation of the nitrogen trapped (or stored) by the cover crop;  • Definition of the nitrogen refund levels for the subsequent crop (kg/ha).  The references used in the calculations are based on more than 10 years of trials on cover crops in Poitou-Charentes/France. Simulations are carried out with INRA's STICS...
Tipo: Practice tool
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/32611/1/PA_015_ITAB_monitoring_cover_crop_ab_GW_MC_LK.pdf

Kurzfristige Auswirkungen des Pflugverzichts auf Collembolen-  Gemeinschaften des Bodens
Provedor de dados: Organic Eprints
Autores: Moos, Jan Hendrik; Schrader, Stefan; Paulsen, Hans Marten.
Collembolans, a widespread group of soil fauna, could potentially be used as indicators of management changes in (organic) farming systems. Therefore, we studied effects of reduced tillage compared with conventional tillage on collembolan communities in the short term. Results of a two-year field trial showed that collembolan communities are likely influenced by different tillage systems. However,  these effects could not be statistically verified. Furthermore, annual variation seems to strongly influence the composition of collembolan communities. We tend to assign these effects to different crops cultivated during our study.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31957/1/Kurzfristige%20Auswirkungen%20des%20Pflugverzichts%20auf.pdf

New Approaches to Phosphorus Regulation and Management
Provedor de dados: Organic Eprints
Autores: Cornish, Peter; Obersen, Astrid.
Phosphorus (P) conservation and the environmental, ecological and economic issues related to over-use and under-use of P on organic farms are addressed. Re-examination of Certification Standards is recommended to ensure the conservation and efficient use of P through adaptation of organic management to local conditions, ecology, culture and scale. Changes that will conserve P and minimise environmental risk are identified, along with the necessary research to make this possible.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/12830/1/12830.pdf

Fertilization of Dioscorea rotundata with poultry manure: effects on nutrient dynamics and nutrient use efficiencies
Provedor de dados: Organic Eprints
Autores: Andres, C.; NGuessan Diby, L.; Kouamé Hgaza, V.; Frossard, E.
Similar effects of poultry manure (PM) and mineral fertilizer suggest that PM is a cheap and effective alternative to fertilizers for yam production!
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2012
URL: http://orgprints.org/25174/1/andreas-etal-2012-fertilization_Dioscorea-rotundata_Poster_SGPW.pdf

Der Einfluss symbiotischer Bodenpilze auf den Stickstoffzyklus
Provedor de dados: Organic Eprints
Autores: Bender, Franz; Conen, Franz; Neftel, Albrecht; Oberholzer, Hans-Rudolf; Olbrecht, Luise; Jocher, Markus; Rollog, Mark; van der Heijden, Marcel G.A.
To increase nutrient use efficiency and reduce nutrient losses are key aspects for sustainable agriculture. Arbuscular mycorrhizal fungi (AMF) are an import and widespread group of plant-symbiotic soil fungi. Here we investigate the role of those soil microorganisms, for effective nutrient recycling. We conducted greenhouse and lysimeter experiments to compare the cycling of important plant nutrients in systems with high and low abundance of AMF. AMF increased plant N nutrition, reduced leaching losses of mineral N, and prevented emissions of N2O, an important greenhouse gas. The results show the importance of AMF for an effective nutrient management. Farmers should implement strategies to promote AMF in the soil, as they are an indispensable compound of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover; Air and water emissions.
Ano: 2013
URL: http://orgprints.org/21514/1/21514_Bender.pdf

Ecological Function and Biodiversity Indicators in European Soils
Provedor de dados: Organic Eprints
The strategic goal of EcoFINDERS is to provide the EC with tools to design and implement soil strategies aimed at ensuring sustainable use of soils, including: i) Characterisation of European soil biodiversity; ii) Determination of relations between soil biodiversity, soil functions and ecosystem services; iii) Design of policy-relevant andcost-effective indicators for monitoring soil biodiversity. The project will: i) Develop and standardise  tools and procedures to measure microbial and faunal diversity; ii) Describe the diversity of soil organisms (microbes and fauna), iii) Decipher the interactions among soil organisms and with plants through foodwebs and iv) Determine the role played by soil organisms in soils ecosystem services (nutrient cycling,...
Tipo: Research Programme description
Palavras-chave: Soil biology; Nutrient turnover; Biodiversity and ecosystem services.
Ano: 2023

Dynamics of mineral nitrogen, water-soluble carbon and potential nitrification in band-steamed arable soil
Provedor de dados: Organic Eprints
Autores: Elsgaard, Lars.
Steaming of narrow soil bands prior to sowing is a new technique that reduces the need for intra-row weeding in herbicide-free row crops. However, the steam treatment may eliminate both weed seeds and non-target soil organisms, thereby affecting the nutrient cycling in the soil. This study tested the effect of band-steaming on N and C dynamics in a sandy loam soil that was steamed in situ to  maximal temperatures of 70–90°C using a prototype bandsteamer. Soil samples (0–5 cm depth) were collected during 90 days from band-steamed soil, undisturbed control soil, and control soil treated just mechanically with the bandsteamer. In the steamed soil, ammonium concentrations  increased from 1.1 to 20.3 μg NH4+-N g−1 dry weight  during 28 days. This coincided with...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil.
Ano: 2010
URL: http://orgprints.org/18005/1/18005.pdf

Coltivare senza aratro - giova al suolo e al clima
Provedor de dados: Organic Eprints
Autores: Krauss, Maike.
Un’agricoltrice che rinuncia all’aratro può generare un arricchimento di humus e più protezione del clima. Perché il metodo funzioni è però necessario un vasto sapere nell’ambito.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Soil tillage; Air and water emissions.
Ano: 2017
URL: http://orgprints.org/32228/1/Bioattualit%C3%A0_6_2017_M.Krauss.pdf

Grundwasserschutz im Organischen Landbau: Untersaaten in Kartoffeln zur Minderung hoher Restnitratmengen im Boden
Provedor de dados: Organic Eprints
Autores: Haas, Guido.
Nach Kartoffeln werden hohe Nitratgehalte im Boden festgestellt. Um diese hohen Nitratgehalte zur und nach der Ernte im Boden organisch bewirtschafteter Kartoffeln zu mindern, wurden in den Jahren 1997 und 1998 verschiedene Arten für eine Untersaat in Feldversuchen auf dem Versuchsbetrieb Wiesengut sowie im Jahre 1999 zusätzlich auf drei weiteren Praxisbetrieben im Rheinland untersucht.  Untersaaten in Kartoffeln sind in organisch wirtschaftenden Betrieben in Anbauregionen mit regelmäßigem frühem Krautfäulebefall anbauwürdig. Für eine Untersaat vor Reihenschluß der Kartoffeln mit dem letzten Häufelgang (etwa Mitte Juni) eignen sich Sonnenblume und Mais. Diese Untersaaten wuchsen nach dem häufig im Juli einsetzenden Krautfäulebefall und raschem Absterben...
Tipo: Book
Palavras-chave: Nutrient turnover; Crop combinations and interactions.
Ano: 2001
URL: http://orgprints.org/13925/1/Report_KaUS02.pdf

Biogaserzeugung im viehlosen Betrieb: Effekte auf Stickstoffmanagement, Erträge und Qualität
Provedor de dados: Organic Eprints
Autores: Stinner, Walter; Möller, Dr. Kurt; Leithold, Prof. Dr. Günter.
In organic farming systems without livestock some problems arise concerning the nitrogen management: On the one hand, there is a lack of transportable nitrogen fertilisers, on the other hand there is a potential for high losses with the usual management. The biological N2 fixation is decreased, when clover grass is mulched. If the biomass of intercrops and clover grass gets mineralised in autumn, it can be leached in winter.   In the trial referred to here, the impact of fermentation of biomass on some agricultural parameters like yield etc. are investigated within a crop-rotation of clover grass, potatoes, winter wheat, peas, winter wheat and summer wheat with undersown clover grass. Intercrops are sown after winter wheat and peas.   In the control...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/3717/1/3717.pdf

N-Lieferung und Beikrautunterdrückung dreier Zwischenfruchtarten
Provedor de dados: Organic Eprints
Autores: Grosse, Meike; Heß, Jürgen.
Methoden der reduzierten Bodenbearbeitung wie nicht-wendende Verfahren oder eine nur oberflächliche Bearbeitung des Bodens gelten als umweltfreundliche Alternativen zum herkömmlichen Pflügen. Sie haben das Potenzial, die positiven Leistungen ökologischer Anbausysteme zu verstärken, wenn sie an die spezifischen Bedingungen des Ökologischen Landbaus angepasst werden. Auf dem Lehr- und Versuchsbetrieb der Universität Kassel, der Hessischen Staatsdomäne Frankenhausen, wurde ein wiederholter einjähriger Versuch angelegt. Dabei wurden drei verschiedene Zwischenfruchtarten mit unterschiedlicher Bodenbearbeitungsintensität eingearbeitet. Darauf folgte der Anbau von Hafer. Untersuchungen zur N-Lieferung und zum Beikrautunterdrückungspotenzial der Zwischenfrüchte...
Tipo: Newspaper or magazine article
Palavras-chave: "Organics" in general; Nutrient turnover; Soil tillage; Weed management.
Ano: 2016
URL: http://orgprints.org/29729/1/TILMAN%20ORG%20Naturland%20Nachrichten%201_2016.pdf

The effect of grasses grown for seed in mixture with legumes on the incidence of weeds and soil nitrogen content
Provedor de dados: Organic Eprints
Autores: Cagas, Bohumir; Machac, Radek.
This report was presented at the UK Organic Research 2002 Conference on behalf of the Colloquium of Organic Researchers (COR).  The incidence of weeds and the content of soil nitrogen were investigated in the first year of a field trial with organic grass seed production in which the grasses were grown with companion legumes. Two grass species, timothy (Phleum pratense L.) cv. Sobol and perennial ryegrass (Lolium perenne L.) cv. Baca, were tested together with three legumes: red clover (Trifolium pratense L.) cv. Start, white clover (Trifolium repens L.) cv. Vysocan and black medick (Medicago lupulina L.) cv. Ekola. The N-nutrition and control of weeds were provided by three “ecological” methods and a conventional one (bacterial nodules of legumes, mulch,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Pasture and forage crops; Crop combinations and interactions; Weed management.
Ano: 2002
URL: http://orgprints.org/8292/1/cagas_machac_Grasses_legumes.pdf

Kan kvælstofmineraliseringen styres ved jordløsning?
Provedor de dados: Organic Eprints
Autores: Thomsen, I. K.
Jordløsning kan fremme frigivelsen af kvælstof, og dermed anvendes som styringsredskab til at øge mængden af mineralsk kvælstof i planternes vækstperiode.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/279/1/abenhus2002.ppt

Effekte unterschiedlicher Systeme der Grundbodenbearbeitung  auf Erträge und Beikraut im Dauerfeldversuch Gladbacherhof
Provedor de dados: Organic Eprints
Autores: Schulz, Franz; Brock, Christopher; Leithold, Günter.
An organic long-term-field experiment with two factors has been carried out since  1998 at the experimental station Gladbacherhof, University of Giessen. Effects of  different crop rotations combined with tillage treatments (mouldboard plough, twolayer-  plough and tillage without plough) on plants, soil and weeds have been  investigated. This article presents results on cash crop yields and weeds according to  soil tillage. It can be concluded that, as for the yields, reduced tillage systems could  cope with the regularly ploughed reference system if at least a shallow soil inversion  was carried out. Concerning the lower yields in the soil tillage system without  ploughing the impact of nutrient availability seems to be more important than the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Weed management; Soil tillage.
Ano: 2009
URL: http://orgprints.org/14272/1/Schulz_14272.pdf

Bedeutung der Wirtschafts- und Sekundärrohstoffdünger für den ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Köpke, Prof. Dr. Ulrich.
Die Düngerwirtschaft im historischen Selbstverständnis des ökologischen Landbaus wird dargestellt. Nährstofflüsse durch innerbetrieblich erzeugte und durch zugekaufte organische Düngemittel werden diskutiert.
Tipo: Book chapter
Palavras-chave: Nutrient turnover; Technology assessment; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/8348/1/S_444_titelei_komplett.indd.pdf

Potential of three microbial bio-effectors to promote maize growth and nutrient acquisition from alternative phosphorous fertilizers in contrasting soils
Provedor de dados: Organic Eprints
Autores: Thonar, Cécile; Lekfeldt, Jonas D.S.; Cozzolino, Vincenza; Kundel, Domimika; Kulhánek, Martin; Mosimann, Carla; Neumann, Günter; Piccolo, Alessandro; Rex, Martin; Symanczik, Sarah; Walder, Florian; Weinmann, Markus; de Neergaard, Andreas; Mäder, Paul.
Background: Agricultural production is challenged by the limitation of non-renewable resources. Alternative fertilizers are promoted but they often have a lower availability of key macronutrients, especially phosphorus (P). Biological inoculants, the so-called bio-effectors (BEs), may be combined with these fertilizers to improve the nutrient use efficiency.    Methods: The goal of this study was to assess the potential of three BEs in combination with alternative fertilizers  (e.g., composted manure, biogas digestate, green compost) to promote plant growth and nutrient uptake in soils typical for various European regions. Pot experiments were conducted in Czech Republic, Denmark, Germany, Italy, and Switzerland where the same variety of maize was grown in...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32920/1/Thonar2017-Potential%20of%20three%20microbial%20bio%E2%80%91effectors%20to%20promote%20maize%20growth%20and%20nutrient%20acquisition%20from%20alternative%20phosphorous%20fertilizers%20in%20contrasting%20soils.pdf

Autumn sown catch crop understoreys as strategy to reduce nitrate leaching in winter cereals
Provedor de dados: Organic Eprints
Autores: Loges, Ralf; Mauscherning, Inken; Taube, Friedhelm.
Under conditions with wet mild winters due to high nitrate leaching risk growing systems with high nitrogen (N) uptake efficiency in autumn are necessary, especially after pre crops with a high N release. In 2003 and 2004 a field trial was conducted in Northern Germany to investigate autumn N uptake and nitrate leaching in autumn sown winter wheat (Triticum aestivum L.) and winter oilseed rape (Brassica napus) grown intercropped with catch crops. Catch crops in pure stands were sown as control. In each system three catch crops common vetch (Vicia sativa), forage rape (Brassica napus) and oats (Avena sativa) were tested simultaneously. The experiment was run parallel after grass clover (high N status) and oats (low N status). N uptake, soil mineral nitrogen...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/12535/1/Loges_12535_ed.doc

Organic farming and resource efficiency
Provedor de dados: Organic Eprints
Autores: Oelofse, Myles; de Neergaard, Andreas.
The Chapter discusses the efficiency of nutrient and energy use in organic farming, regarding the pressing need to make efficient use of natural resources. Nutrient recycling, the use of adapted plant varieties and energy-saving through the ban of synthetic nitrogen fertilizer are organic farming practices that enhance resource efficiency.
Tipo: Report chapter
Palavras-chave: "Organics" in general; Nutrient turnover; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/18489/1/18489.pdf

Collembola’s role in regulating mass fluxes in soil and the effects of contrasting life histories
Provedor de dados: Organic Eprints
Autores: Larsen, Thomas; Krogh, Paul Henning; Magid, Jakob; Hobbie, Erik; Marc, Ventura.
The study determined metabolic rates and elemental pools for two Collembola species with contrasting life histories. The fittest of the two species, P. minuta, excreted the equivalent of 10–12% of the elemental body content per day, and P. armata 7–10%. Most elements are lost to excretion (CO2 and N-waste). These figures in combination with stoichiometry and life histories indicate that the cost of P. minuta’s better fitness is a requirement for a higher quality diet than P. armata. The data produced in this study can be used to estimate the collembolan contribution to C and N fluxes in the soil.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2006
URL: http://orgprints.org/9257/1/9257.pdf

Sicherung des Ertragspotentials von Luzerne-Kleegrasbeständen durch Verbesserung des aktuellen Schwefelversorgungszustandes ökologisch bewirtschafteter Flächen - Situation und Bedeutung unter Praxisbedingungen
Provedor de dados: Organic Eprints
Autores: Becker, Konstantin; Riffel, Alexandra; Leithold, Günter.
Mit In den Jahren 2012 bis 2014 durchgeführten deutschlandweiten Untersuchungen sollte festgestellt werden, inwiefern die Flächen des ökologischen Landbaus durch den mittlerweile eingetretenen Rückgang der Schwefeleinträge aus der Atmosphäre von einer allgemeinen Schwefelmangelsituation betroffen sind, die negative Auswirkungen auf das Wachstum und das Leistungsvermögen von Futterleguminosen haben und damit die Nachhaltigkeit im ökologischen Landbau gefährden. Zudem sollten geeignete Parameter gefunden werden, um die Schwefelversorgungsituation für den Anbau von Futterleguminosen im ökologischen Landbau prognostizieren und charakterisieren zu können, sowie Handlungsempfehlungen für ökologisch wirtschaftende Betriebe abgeleitet werden.  Die...
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/29689/1/29689-10OE104-uni-giessen-leithold-2015-luzerne-kleegrasbestaende.pdf

SimDen - en simpel model til kvantificering af N2O-emission og denitrifikation.
Provedor de dados: Organic Eprints
Autores: Vinther, Finn P.; Hansen, Søren.
Denitrifikationen, som er særdeles vigtig både i landbrugs- og miljømæssig henseende, er en af de vanskeligste processer i kvælstof kredsløbet at kvantificere, idet den er kendetegnet ved en stor rumlig og tidslig variation. Der er brug for mange ressourcekrævende målinger for med rimelig sikkerhed at kvantificere denitrifikationen på markniveau. Eksperimentel bestemmelse af denitrifikationen er derfor oftest udelukket, og man må ty til matematiske modeller, hvis man ønsker at estimere hvad denitrifikationen har været, eller ønsker at vide hvad denitrifikationen måtte blive ved en given ændring i landbrugspraksis. Også modeller kan dog være vanskelige at håndtere, idet de fleste modeller kræver adgang til flere baggrundsoplysninger end det oftest er muligt...
Tipo: Report
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/3139/1/SimDen.pdf

Root Growth and Nitrogen Utilization of a Leek Crop and an Undersown Catch Crop
Provedor de dados: Organic Eprints
Autores: Nielsen, Dr. Kai Lønne; Thorup-Kristensen, Dr. Kristian.
After its late harvest a leek (Allium porrum) crop will normally leave large quantities of nitrogen (N) in the soil which may be subject to leaching. A possible method to reduce N leaching losses is to establish a catch crop before the harvest of the leek crop. It was the aim of this study to investigate the effects of incorporating a catch crop in a leek crop with minimal competition and to monitor how root growth affected N availability across soil depths at different distances between catch and leek crop rows. To reduce competition between both crops leek was planted at 0.5 and 0.75 m row distances and chicory (Cichorium intybus) as a catch crop at an interrow spacing of 0.75 m. Minirhizotron glass tubes were inserted in the  middle of the interrow...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Production systems; Crop combinations and interactions; Vegetables.
Ano: 2001
URL: http://orgprints.org/1608/1/KTK_06009.pdf

Sådan findes den optimale balance mellem øko-græsproduktion og miljø
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Græsmarker af længere varighed, forbedret management, strategisk gødskning og artsblandinger er nøgleord, når den optimale balance mellem produktion og miljø skal findes på stadig større kvægbrug.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/16295/1/16295.pdf

Drohnenbilder zur Untersuchung von Pflanzenwachstum und Nährstoffdynamik
Provedor de dados: Organic Eprints
Autores: Wittwer, Raphaël; Tombez, Grégoire; van der Heijden, Marcel.
Ein besseres Verständnis der Dynamik hinter der Freisetzung von pflanzenverfügbaren Nährstoffen aus Boden oder organischen Dünger und eine Verbesserung der Nährstoffverwertung von Ackerfrüchten sind zwei wichtige Herausforderungen, um die Produktivität im ökologischem Ackerbau zu erhöhen. Doch diese Prozesse sind stark sowohl von biotischen (z.B. Bodenmikroben) als auch abiotischen (z.B. Temperatur, Niederschlag, Bodenfeuchtigkeit, Bodenstruktur) Faktoren beeinflusst und erschweren effiziente Untersuchungen. Fernbilderkundung-Technologien (remote sensing) haben sich in den letzten Jahren stark weiterentwickelt und bieten heute neue Ansätze und Methoden, um der Ernährungsstatus von Pflanzen sowie die Dynamik des Pflanzenwachstums nicht destruktiv zu...
Tipo: Conference paper, poster, etc.
Palavras-chave: Surveys and statistics; Specific methods; Nutrient turnover; Crop husbandry.
Ano: 2015
URL: http://orgprints.org/27132/1/27132_wittwer.pdf

Improving Yield of Corchorus Olitorus I. with Legacy Fertility of Jack Bean Fallow and Compost Amendments in an Organic Farming System
Provedor de dados: Organic Eprints
Autores: AdeOluwa, Olugbenga O.; Oyewole, O. Matilda; Soetan, G. O.
Ability of applied soil fertilizer to sustain crop production beyond a cropping season is an advantage to farmers, especially resource constraint organic farmers who cannot afford repeated application of organic fertilizers. Thus, this report presents evaluation of legacy soil fertility (residual) influence of previous Jack bean-fallow and a commercial compost application on the yield of corchorus in an organic farming system in two cropping seasons. The experiment was conducted at the Organic Vegetable Garden of Teaching and Research Farm, University of Ibadan, Corchorus seed were sown in plots of Brewery Waste Compost grades A and B, Brewery Waste Compost grade A +Jack bean residual fertility, Brewery Waste Compost grade B + Jack bean residual fertility,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil.
Ano: 2018
URL: http://orgprints.org/33437/4/10%20AdeOluwa%2C%20OO%20Article.pdf

FØJOII-29: Nature Quality in Organic Farming. Midterm Status Report 2003
Provedor de dados: Organic Eprints
Autores: Fredshavn, Jesper; Tybirk, Knud; et al.,.
The work is organised in five work packages (WP 1-5, Table A1). Since the start in July 2001 the following work has been accomplished:   WP 1. Starting up seminar and the annual seminars have served as a successful platform for project planning and cross-cutting activities. The general project co-ordination and planning of field work and selection of case study areas has been stimulated both at these meetings and in separate meetings with the WP responsibles. The first cross-cutting (CC4) has been accomplished in close co-operation with WP 5 and all project scientists. A homepage for the project is now available.   WP 2. Eleven case areas with high concentration of organic farmers have been selected and 347 farmers have been interviewed. A database...
Tipo: Report
Palavras-chave: Nutrient turnover; Landscape and recreation; Soil biology; Biodiversity and ecosystem services.
Ano: 2003
URL: http://orgprints.org/1577/1/1577.pdf

GREENHOUSE GAS FLUXES IN AGRICULTURAL SOILS UNDER ORGANIC AND NON-ORGANIC MANAGEMENT
Provedor de dados: Organic Eprints
Autores: Gattinger, Andreas; Skinner, Colin; Müller, Adrian; Krause, Hans-Martin; Mäder, Paul.
Farming practices are known to exert strong control over the soils’ function to act as sources or sinks for greenhouse gases (GHG). This paper deals with the outcome of a recent meta-analysis based on the evaluation of 19 published long-term farming system comparisons. It provides a comprehensive data base regarding GHG fluxes from soils under organic and non-organic management. There is scientific evidence for lower nitrous oxide emissions from organically managed soils when scaled to the area. However, further data from farming system comparisons are required, particularly from long-term GHG measurements covering several cropping seasons or ideally entire crop rotations. This enables closing knowledge gaps concerning N fluxes and pools under organic...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover; Air and water emissions; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/24368/1/24368%20Gattinger_submitted_MM.pdf

Entwicklung der Grundnährstoffgehalte in einem schwach lehmigen Sandboden Nordostdeutschlands nach langjähriger ökologischer Bewirtschaftung
Provedor de dados: Organic Eprints
Autores: Gruber, Dr. Harriet; Thamm, Uwe.
The following paper shows the impact of organic farming on the development of contents of phosphorus, potassium and magnesium in the soil. The basis is a six-year crop rotation with animal manures (85 dt/ha/a) in the location of Gülzow (Mecklenburg- Prepomerania). From 1993 to 2004 samples of soil were taken with aan soil auger in a depth between 0 and 30 cm. The discussion of changes in chances of the nutrient contents nutriens content is connected with nutrient balances. As a result, nutrients bilances, witch are in balance. On this time the the contents of potassium shows decreasing tendency. Organic farming does notno lead to lower contents of phosphorus and magnesium. The impacts of soil and year are high.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/3454/1/3454.pdf

Organik Bitkisel Üretimde Biyoteknoloji ve Ar-Ge
Provedor de dados: Organic Eprints
Autores: Sahin, Fikrettin.
Dünyada tarımsal üretimin yoğun olarak yapıldığı ülke veya bölgelerde sentetik gübre ve kimyasalların aşırı kullanımı insan ve çevre sağlığını tehdit ettiği çok sayıda bilimsel araştırmalar ile ortaya konulmuştur. Bu nedenle aşırı sentetik gübre ve kimyasalların tarımsal üretimde kullanılmasının insan sağlığı ve ekolojik denge üzerindeki olumsuz yan etkilerini azaltmak veya tamamen ortadan kaldırmak için yeni ve alternatif tarımsal üretim sistemleri geliştirilmiştir. Tarımsal üretimde sentetik girdileri azaltan sürdürülebilir tarım veya reddeden (mümkünse) organik tarım stratejileri önem kazanmıştır. Organik tarım daha çok dogal girdilerin kullanılması önerilmektedir. Bitkisel üretimde verim ve kaliteyi tehtid eden sorunların (beslenme ve koruma) çözümünde...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Nutrient turnover; Farm nutrient management.
Ano: 2010
URL: http://orgprints.org/26606/1/Fikrettin%20SAH%C4%B0N.pdf

Understanding soil nitrogen supply: organic matter quality and quantity
Provedor de dados: Organic Eprints
Autores: Hatch, David; Shepherd, Mark; Hatley, Damian.
This report was presented at the UK Organic Research 2002 Conference. The soil organic matter (SOM) contents of organic and conventionally farmed soils were compared. Whilst the quantity of SOM was found to be similar with both systems, the quality of SOM differed in respect of higher amounts of N released by the organic soils under anaerobic incubation. This indicated a greater potential rate of mineralization and suggested that the inherent fertility of the organic soils had been improved
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farming Systems; Soil quality.
Ano: 2002
URL: http://orgprints.org/8262/1/Hatch_soil_nitrogen_supply.pdf

Sorption of dissolved organic C and P to agricultural top- and subsoil
Provedor de dados: Organic Eprints
Autores: Gjettermann, Birgitte; Styczen, Merete; Hansen, Søren; Borggaard, Ole K.; Hansen, Hans C.B.
In order to study the mobility of dissolved organic carbon (DOC) and dissolved organic P (DOP) in soil, the pH-dependent sorption of dissolved organic matter to an agricultural top- and subsoil was investigated. In general, sorption isotherms had convex shapes and DOC and DOP sorption increased with time of reaction. There was a very pronounced effect of pH resulting in much higher sorption of DOC at pH 5 than at pH 7; actually extensive desorption was observed at pH 7 especially for the topsoil. Similar sorption patterns were observed for DOP, but they were not as pronounced as for DOC.
Tipo: Conference paper, poster, etc.
Palavras-chave: Environmental aspects; Nutrient turnover; Soil biology; Soil quality.
Ano: 2004
URL: http://orgprints.org/5391/1/5391.pdf

Les principes de la fertilité des sols
Provedor de dados: Organic Eprints
Autores: Berner, Alfred; al., et.
La brochure met en lumière la fertilité du sol à partir de divers points de vue scientifiques et ruraux. Les informations visent à compléter les observations pratiques des agriculteurs et veulent encourager les lecteurs à réfléchir à la relation avec le sol et à pratiquer une culture du sol véritablement durable.
Tipo: Book
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage.
Ano: 2013
URL: http://orgprints.org/25235/1/1587-fertilite-des-sols.pdf

Mineralization of lupine seed meal and seedlings used as          N fertilizer in organic vegetable production
Provedor de dados: Organic Eprints
Autores: Katroschan, K.; Stützel, H.
Seeds of grain legumes are currently discussed as N fertilizer in organic vegetable production. They can be produced by the farmers themselves and applied in well controlled amounts flexibly in time and space. Most research investigating the N mineralization of grain legume seeds was carried out using coarsely milled seeds. We hypothesized that seed germination alters the chemical composition leading to a higher N release compared to seed meal. In a pot experiment the C:N ratio of lupine seeds was shown to decrease noticeably within the first two weeks after sowing. After an incubation period of 1300°Cd net N mineralization was significantly higher for the lupine seedlings compared to the seed meal and close relationships between N mineralization and C:N...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2008
URL: http://orgprints.org/12677/1/Katroschan_12677_ed.doc

Kvælstof fra luften
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
Kløvergræs kan hente gratis kvælstof fra luften, men hvor meget drejer det sig egentlig om?  Bælgplanter, herunder de forskellige kløverarter, kan ved knoldbakteriers hjælp (symbiose) optage luftens kvælstof (N2), og derved udnytte denne uudtømmelige kvælstofkilde. Processen er simpelt-hen forudsætningen for at kunne drive økologisk jordbrug, og det har derfor stor interesse at kende størrelsen af N-fikseringen og have kendskab til hvilke faktorer der har betydning for derved om muligt at kunne optimere produktiviteten og reducere eventuelle miljømæssige effekter af et givet dyrkningssystem.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Production systems; Pasture and forage crops.
Ano: 2003
URL: http://orgprints.org/1835/1/Klumme_fra_Finn_Vinther.doc

Localized application of sewage sludge improved plant nitrogen and phosphorus uptake by rhizobox-grown spring wheat
Provedor de dados: Organic Eprints
Autores: Wang, Yaosheng; Stoumann Jensen, Lars; Magid, Jakob.
Sewage sludge (SS) can be used as an alternative fertilizer in agriculture. It is normally broad- casted and plowed into soil, but it is not clear if it has a potential as a placement fertilizer. A rhizo- box experiment was conducted to investigate the placement effect of SS and mineral nitrogen (N) fertilizer on shoot and root growth as well as nutrient uptake of spring wheat (Triticum aesti- vum L.). The treatments included localized SS, mixed SS, localized SS and ammonium, local- ized ammonium, and a control without addition of SS and ammonium to examine the effect of SS placement and, further, if ammonium co-localization would enhance the placement effect. The re- sults show that SS fertilization improved soil N and P availability, which significantly...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2016
URL: http://orgprints.org/30701/1/Wang%20Localized%20application%20JPNSS%202016.pdf

Soil fertility in three cropping systems after conversion from  conventional to organic farming
Provedor de dados: Organic Eprints
Autores: Bakken, Anne Kjersti; Breland, Tor Arvid; Haraldsen, Trond K.; Aamlid, Trygve S.; Sveistrup, Tore E.
Temporal changes in the scores of selected soil fertility indices were studied over six years in three different cases of organic crop rotation located in southern, eastern and central Norway. The cropping history and the initial scores of fertility indices prior to  conversion to organic cropping differed between the sites. Crop yields, regarded as an   overall, integrating fertility indicator, were in all rotations highly variable with few consistent temporal trends following the first year after conversion. On the site in eastern Norway, where conversion followed several years of all-arable crop rotations, earthworm number and biomass and soil physical properties improved, whereas the system was apparently degrading with regard to P and K trade balances...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology; Farm nutrient management.
Ano: 2005
URL: http://orgprints.org/7855/1/ANNE_KJERSTI_BAKKEN.pdf

Undersowing legume crops for green manuring of lettuce
Provedor de dados: Organic Eprints
Autores: Sørensen, Jørn Nygaard; Thorup-Kristensen, Kristian.
The objective of this experiment was to investigate the potential of several species of undersown legume crops to deplete soil nitrate and to accumulate nitrogen. A further objective was to measure the effects of the legume crops as a green manure for a succeeding early lettuce crop. In two years, different undersown legume crops were compared to a control treatment where no crop was undersown. In November, at the end of their growing season, the legume crops reduced the content of mineral nitrogen in the top 1 m of the soil to one third of what was available when no crop was undersown. The N uptake in shoots and roots was in the range of 100-160 kg ha-1. The legume crops were incorporated at the beginning of April the succeeding year. In May, the content...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/1204/2/Biological_Agriculture_and_Horticulture_2003.doc

Efterafgrøder i majs - hvor svært kan det være?
Provedor de dados: Organic Eprints
Autores: Hansen, E.M.
Klimaændringer og majs hører sammen, ligesom klimaændringer og risiko for udvaskning formentlig hører sammen. Noget tyder på, at dyrkning af majs og risiko for udvaskning også hører sammen. I et forsøg på grovsandet jord, hvor der blev høstet godt 13 tons tørstof pr. ha, blev der udvasket 86 kg N pr. ha i ugødet majs efter kløvergræs. Der er derfor god grund til at benytte dyrkningsmetoder, der effektivt kan reducere risikoen for udvaskning efter majs. Udlæg af efterafgrøder er en oplagt mulighed, da efterafgrøder er en velkendt metode til at redu-cere udvaskningen – så hvor svært kan det være?
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2010
URL: http://orgprints.org/17878/1/17878.pdf

Organisk materiale i jord - fra stoff til økosystem
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun; Swensen, Berit.
Organic matter i soil - from chemical substance to ecosystem.
Tipo: Working paper
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Farm nutrient management; History of organics.
Ano: 2016
URL: http://orgprints.org/30082/1/Organisk%20materiale%20i%20jord%20-%20fra%20stoff%20til%20system%20INFO%20ferdig%20m%20ISBN%20m%20logo.pdf

Effects of digestate from anaerobic digested cattle slurry and plant materials on soil microbiota and fertility
Provedor de dados: Organic Eprints
Autores: Johansen, Anders; Carter, Mette S.; Jensen, Erik Steen; Hauggaard-Nielsen, Henrik; Ambus, Per.
Anaerobic digestion of animal manure and crop residues may be employed to produce biogas as a climate-neutral source of energy to provide fertilizers which allow recycling of plant nutrients on the farm. However, compared to fertilizing with the pristine input materials (e.g. raw animal slurry or plant residues), the effect on soil microbiota and soil fertility may be impacted due to the increased content of mineral nitrogen (N) and decreased amount of organic carbon (C); an issue of concern in especially organic farming systems.  An incubation study was performed where 1) water, 2) raw cattle slurry, 3) anaerobically digested cattle slurry + maize, 4) anaerobically digested cattle slurry + grass-clover, or 5) fresh grass-clover was applied to soil at...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions; Biodiversity and ecosystem services; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/20446/4/20446.pdf

Agronomic options for the management of phosphorus in Australian rain-fed organic broadacre farming systems
Provedor de dados: Organic Eprints
Autores: Penfold, Mr. Chris; McNeill, Dr. Ann.
The paper is an overview of strategies for agronomic management of P in organic broad-acre farming systems within the Australian rain-fed cereal/livestock belt. It concludes that to raise and maintain adequate plant-available P in these systems the importation of organic manures or composts from off-farm will be required, although the immediate issue may be access to economically viable sources.  Improving the P-use efficiency of the system by incorporating species into rotation or intercropping systems that are able to access P from less soluble sources has been a successful strategy elsewhere in the world and deserves further research effort in Australia. Agronomic management to maximise quantity and quality of pasture and crop plant residues undoubtedly...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/12466/1/Penfold_12466_ed.doc

Kvælstof begrænser udbytter i kornrige sædskifter
Provedor de dados: Organic Eprints
Autores: Hermansen, S.
Kvælstof er udbyttebegrænsende for udbytterne i økologiske sædskifter med korn
Tipo: Report chapter
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2018
URL: http://orgprints.org/35353/1/Oversigten.pdf

Effectiveness of Agroecological Intensification Techniques Towards Enhancing Soil Nutrient Status, Moisture Content, and Crop Productivity in Semi-Arid Lands of Kenya
Provedor de dados: Organic Eprints
Autores: Onwonga, Richard Ndemo; Lelei, Joyce J. Ndemo; Namoi, Nictor Litunya.
The current study investigated effectiveness of selected agroecological intensification techniques on soil moisture, nutrient (N, P, and organic C) status, and crop yields in semi-arid Katangi division of Yatta sub-County, Kenya. The study was conducted for two seasons; long and short rains of 2010. The experimental set up was a split plot fitted to a randomized complete block design. The main plots were three cropping systems (CS); monocropping (cassava and sorghum), intercropping [sorghum/dolichos (Lablab purpureus), sorghum/pigeonpea (Cajanus cajan (L.) Millspaugh), cassava/dolichos, cassava/pigeon pea) and rotation (dolichos - sorghum, pigeon pea - sorghum, dolichos - cassava and pigeon pea-cassava). The split plots comprised organic fertilizers (OF);...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Composting and manuring; Nutrient turnover; Farm nutrient management.
Ano: 2015
URL: http://orgprints.org/28879/1/Onwonga_aoc_2015_agroecological%20Intensification.doc

Efficient use of grassland nitrogen
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
In nitrate sensitive areas with agricultural production the recommended upper limit of nitrate in percolation water is 50 mg per litre. Organic farming has a lower nitrate leaching potential compared to conventional farming, but may occasionally exceed this limit, especially in the case of dairy crop rotations. In such rotations a considerable build-up of N takes place in grazed grassland. Therefore, organic dairy farming may only present an opportunity to reduce nitrate leaching if this grassland N is efficiently utilised. Losses may occur during grazing, and ploughing of grassland is followed by a large increase in the mineralization of N that often exceeds the need of the subsequent arable crop.    An experimental site at Research Centre Foulum has...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/3673/1/3673.doc

Using C-Tool to simulate soil carbon and radiocarbon development
Provedor de dados: Organic Eprints
Autores: Petersen, B.M.; Berntsen, J.
Tho model framework C-TOOL was used to simulate soil carbon and radiocarbon development. A simple three-compartment model was sufficient for describing the data.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/89/1/89.pdf

Harvning - inte bara en ogräsfråga
Provedor de dados: Organic Eprints
Autores: Myrbeck, Åsa.
Ogräsharvning – inte bara en ogräsfråga    Åsa Myrbeck  Avdelningen för jordbearbetning, SLU    Bakgrund  Val av jordbearbetningssystem kan vara av avgörande betydelse för resultaten vid ekologisk odling. Bland annat ersätter jordbearbetning och andra tekniska åtgärder stora delar av den kemiska bekämpningen av ogräset. De huvudsakliga målen med jordbearbetning brukar anges som 1) att luckra jorden, 2) att kontrollera ogräs, 3) att blanda in skörderester för att möjliggöra en bra såbädd och minska risken för växtsjukdomar och 4) att blanda in gödsel. Men det finns fler processer av betydelse för växtodlingen som delvis kan styras med hjälp av jordbearbetning. Bland annat är metoder och tidpunkt för jordbearbetning av stor betydelse för omsättningen av den...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality.
Ano: 2005
URL: http://orgprints.org/6508/1/myrbeck234_236.pdf

Labile phosphorus forms in irrigated and rain-fed semiarid Mediterranean grassy crops with long-term organic and conventional farming practices.
Provedor de dados: Organic Eprints
Autores: Romamyà, Joan; Rovira, Pere.
The availability of organic fertilisers plays a major role in organic farming systems. Such systems exclude the use of synthetic fertilisers, whilst  aiming to optimise internal nutrient cycling. The low availability of manures, particularly in dry areas, can lead to negative nutrient balances inmany  organic farming systems. Such negative nutrient balances are mainly found for P and K. In this paper,we aim to study the availability of P in irrigated  and rainfed semiarid Mediterranean grassy crops with long-term organic and conventional farming practices. NaHCO3 extracts were prepared from  an array of soils from 16 plots, covering organic and conventional management in rainfed and irrigated conditions. Inorganic (NaHCO3-Pi) and  organic P (NaHCO3-Po)...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2007
URL: http://orgprints.org/11486/1/Labile_phosphorus_forms_in_irrigated_and_rainfed_semiarid_Mediterranean_grassy_crops_with_long%2Dterm_organic_or_conventional_farming_practices.pdf

Inorganic nitrogen in soil green manured with biocidal crops
Provedor de dados: Organic Eprints
Autores: Marchetti, Rosa; Casadei, Nerio; Marino, Antonio; Sghedoni, Lidia.
The knowledge of the dynamics of inorganic N in soil may help to establish the most suitable timing for green manure (GM) incorporation, which leads to the improvement of crop N use efficiency in conventional as well as organic agriculture. The practice of green manuring with crop species belonging to the Brassicaceae family has recently expanded, in Italy and abroad, due to their demonstrated biocidal effect against soil-borne pathogens. In this plot-scale study we monitored the release of soil inorganic N in 3 soil types (1 clay and 2 loams), in the months following late-spring green manuring with plant material from Brassica juncea, Sinapis alba, and Raphanus sativus species. Soil inorganic N content increased and reached a maximum 2 months after GM...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2008
URL: http://orgprints.org/11983/1/Marchetti_11983_ed.doc

Ertragsentwicklung langjährig viehlos bewirtschafteter Öko-  Ackerflächen am Oberrhein
Provedor de dados: Organic Eprints
Autores: Recknagel, Jürgen; Nußbaumer, Helmut.
The evaluation of data from arable land in the southern part of upper Rhine valley that  has been cultivated in organic agriculture without livestock since 1972 showed  decreasing soil-contents of plant available P and K despite of positive fertilizer  balances as well as decreasing yields of cereals on sites of lower quality. Only on a  profound soil with a high level of organic substance this trend was not as marked; with  autumn rye and soybeans there the yield trend was even positive (see figure 1).
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/31552/1/Ertragsentwicklung%20langj%C3%A4hrig%20viehlos%20bewirtschafteter.pdf

Assessing soil biological characteristics: a comparison of bulk soil community DNA-, PLFA-, and Biolog-analyses
Provedor de dados: Organic Eprints
Autores: Widmer, F.; Fliessbach, A.; Laczkó, E.; Schulze-Aurich, J.; Zeyer, J.
Soil microbiological analyses may serve as a means for assessing soil characteristics. Standard microbiological culture-techniques, however, leave over 90% of the microorganisms in the environment unaccounted for. Several more recently developed analytical techniques such as DNA, phospholipid fatty acid (PLFA), and community level substrate utilization (CLSU) Ængerprints allow for more detailed analyses of soil microbial communities. We applied analyses of (1) community DNA with PCR and restriction fragment length polymorphism (RFLP), (2) community PLFAs with gas chromatography and mass spectrometry, and (3) CLSU with Biologe gram-negative-plates, to evaluate the biological characteristics of three soils used in pesticide degradation studies. Each of these...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality; Biodiversity and ecosystem services; Soil biology.
Ano: 2001
URL: http://orgprints.org/2944/1/widmer%2Det%2Dal%2D2001%2Dbulk%2Dsoil.pdf

Udvaskning før og efter ompløjning af kløvergræs
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
I afgræsningsmarker ophobes store mængder kvælstof, som det kan være vanskeligt at udnytte effektivt. Årsagen er, at intensiv afgræsning forøger risikoen for tab, fordi køerne udskiller en meget stor del af deres N-indtagelse i gødningen - hovedparten i marken under afgræsning. Af betydning for N-udvaskning i sædskiftets græsfase er: 1) græsmarkens alder, 2) botanisk sammensætning (kløver/græs), 3) benyttelse (afgræsning/slæt), 4) gødningstilførsel samt 5) tidspunkt for afgræsning. I forsøg er undersøgt betydningen af græsmarkens alder og sammensætning på udvaskning i sædskiftets græsfase. Resultaterne viser store forskelle mht. udvaskning fra ældre græsmarker. Mens udvaskningen fra gødet rent græs stiger dramatisk med græsmarkens alder, så er den på et...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/3669/1/3669.pdf

Vergleich der pflanzenbaulichen Systemwirkungen vergorener und unvergorener Wirtschaftsdünger und Vergärung von pflanzlichen Koppelprodukten in einem Betriebssystem der ökologischen Landwirtschaft mit Viehhaltung
Provedor de dados: Organic Eprints
Autores: Deuker, Arno; Möller, Kurt; Leithold, Günter.
The influence of biogas production in organic farming systems on different agricultural aspects is being researched in a field trial on the research station Gladbacherhof of the University of Giessen. The investigations took place within a whole crop rotation including 7 different crops in 8 years: two years clover grass followed by winter wheat, potatoes, rye, peas, spelt and at last summer wheat with undersown clover grass. Intercrops were sown after winter cereals and peas. This crop rotation is able to feed an average livestock husbandry in organic farming (0.8 cows ha-1). Four different fertilizing systems are being compared: 1) solid manure ploughed under before seeding of crops, 2) slurry spread out in emerging winter cereals or ploughed under to...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2005
URL: http://orgprints.org/3697/1/3697.pdf

Ackerbausysteme im ökologischen Landbau unter besonderer Berücksichtigung von N-Bilanz und Effizienzkennzahlen
Provedor de dados: Organic Eprints
Autores: Beckmann, Uta; Kolbe, Hartmut; Model, Annett; Russow, Rolf.
Auf einem Sandboden und einem Lößboden wurden in Sachsen ab dem Jahr 1992 komplexe Dauerversuche durchgeführt. Es wurden Verfahren von viehlosen (System Marktfruchtbau) sowie von viehhaltenden Betrieben (System Futterbau) in der Anbaufolge mit zweijährigem Leguminosengras, Sommerweizen und Mais simuliert. In den Versuchen wurden außerdem eine stark unterschiedliche Düngungshöhe mit verschiedenen organischen Düngemitteln sowie differenzierte anbautechnische und vegetationsbegleitende Maßnahmen berücksichtigt. Die Anbauverfahren wurden sowohl in ihren kurzzeitigen Auswirkungen auf Nährstoffdynamik (Nmin, gasförmige N-Emissionen), Ertrag und Produktqualität der Kulturarten als auch in ihren langfristigen Auswirkungen auf die Nährstoffbilanzen der Fruchtfolgen...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Systems research and participatory research; Nutrient turnover; Crop combinations and interactions; Soil tillage.
Ano: 2001
URL: http://orgprints.org/3947/1/UFZ_GasfEmiss_Abschlb.pdf

Hvordan undgås svovlmangel i økologiske sædskifter
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
I det seneste årti har der været stigende opmærksomhed på gødskning med svovl i det konventionelle landbrug. Tidligere, hvor nedfaldet af svovl fra atmosfæren var op imod 40 kg pr. ha, var det tilstrækkeligt til at dække planternes behov. En reduktion af forureningen fra afbrænding af olie og kul har sænket dette til under 10 kg pr. ha, og planterne har derfor i dag et reelt behov for supplerende tilførsel af svovl. En tilstrækkelig forsyning med svovl er vigtig, ikke alene for udbyttet, men også for kvaliteten af foder og brødhvede. Det har desuden vist sig, at svovl har betydning for planternes N-udnyttelse. Disse forhold gælder naturligvis også under økologiske betingelser, hvor behovet dog er mindre pga. et lavere udbytteniveau. Især bedrifter uden...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/3179/1/Dokument.doc

Evaluation of Different Organic ‘Packages of Practice’ in Young Tea Plantation: A case study under FAO-CFC-TBI Project at Maud Tea Estate, Assam, India
Provedor de dados: Organic Eprints
Autores: Seal, A; Bera, R; Datta, A; Saha, S; Roy Chowdhury, R; Chatterjee, Ashis Kumar; Barik, Arun Kumar; Mazumdar, Debasis; Dolui, Ajit Kumar; Sarkar, R.K.
Maintenance of young tea under organic package of practice is a challenging task and needs a proper intervention. The present study under FAO-CFC-TBI project was done at Maud Tea Estate, Assam, India to find out an effective pathway for growing healthy and productive young tea plants. Seven different organic packages of practice were chosen to evaluate their potential in terms of crop efficiency as well as soil quality rejuvenation. Crop yield was recorded of highest value under Inhana Rational Farming (IRF-2: made tea 807 kgha-1) package of practice. Yield under the treatment was 55.2 percent higher than control and about 25.6 percent higher than the next best performing package of practice i.e. VMI (653 kgha-1). The third highest yield was obtained under...
Tipo: Journal paper
Palavras-chave: Farming Systems; Nutrient turnover; Environmental aspects; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/32130/1/%2810-16%29%20Evaluation%20of%20Different%20Organic%20Packages%20of%20Practice%20in%20Young%20Tea%20Plantation.pdf

Messung und Modellierung von Änderungen der organischen Bodensubstanz in einem Kurzzeit-Feldversuch
Provedor de dados: Organic Eprints
Autores: Knebl, Lucas; Leithold, Günter; Brock, Christopher.
Aim of the study was to determine to what extend data collected in a short term field experiment can be used in the validation of a humus balance model. The „hudycrop“ short term field experiment comprised different cropping systems with a uniform previous crop (spring barley), followed by winter wheat, potatoes, red clover (3 cuts/harvested or mulched), all without additional fertilizer application. The sampling design of the experiment was small scaled, assessing biomass as well as soil organic carbon (SOC) and soil total nitrogen (STN) changes (0 - 30 cm soil depth) in miniplots (each 1 m²). Soil organic matter (SOM) changes were calculated with consideration to bulk density. Parallel to this, SOM change, based on SOC and STN inputs and outputs, was...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/27253/1/27253_knebl.pdf

N transfer in three-species grass-clover mixtures with chicory, ribwort plantain or caraway
Provedor de dados: Organic Eprints
Autores: Dhamala, NR; Rasmussen, J; Carlsson, G; Søegaard, K; Eriksen, J.
Background and aims   There is substantial evidence that legume-derived Nitrogen (N) is transferred to neighboring non-legumes in grassland mixtures. However, there is sparse information about how deep rooted nonlegume forage herbs (forbs) influence N transfer in multi-species grasslands.  Methodology   Red clover (Trifolium pretense L.) was grown together with perennial ryegrass (Lolium perenne L.) and one of three forb species: chicory (Cichoriumintybus L.), ribwort plantain (Plantago lanceolata L.) or caraway (Carum carvi L.) in a field experiment. During the first year after the establishment, red clover leaves were labeled with 15N-urea to determine the N transfer from red clover to companion ryegrass and forbs.  Results   On an annual basis, up to 15...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/31453/7/Dhamala%20et%20al_%202017.pdf

Changes in light fraction soil organic matter and in organic carbon and nitrogen in compost amended soils
Provedor de dados: Organic Eprints
Autores: Owen, Ms. Josée; Lynch, Dr. Derek; Fillmore, Ms. Sherry.
Organic vegetable growers can use compost to supply crops with nutrients and increase soil organic matter (OM), but little information is available about the transformations of compost OM over time in organically managed systems. This study examined light fraction soil organic matter (LFSOM) and organic carbon (C) and nitrogen (N) in organically and conventionally managed snap bean cropping systems (continuous beans (CB) and a fully phased beans/fall rye rotation (BR)) following three years of fertility treatments (1x and 3x compost, and 1x synthetic fertiliser, where 1x provided 50 kg ha-1 N). Light fraction C and N increased with compost amendment, with the C:N ratio significantly lower in composted plots than in synthetically fertilised plots. Rotation...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality.
Ano: 2008
URL: http://orgprints.org/11791/2/Owen_11791_ed.doc

Fertilisation de la courge de plein champ en AB
Provedor de dados: Organic Eprints
Autores: VEDIE, Hélène.
Un essai fertilisation comparant différentes doses d'azote total apportées (0-50-100-150 unités/ha) et 2 formes d'engrais organique(tourteau de ricin et Orga 6)a été conduit en plein champ pendant l'été 2009. Les résultats montrent que l'optimum agronomique et économique de cet essai est de 100 unités/ha apportées avec le tourteau de ricin, qui s'avère plus efficient que l'autre engrais testé.
Tipo: Other
Palavras-chave: Nutrient turnover; Soil; Vegetables.
Ano: 2009
URL: http://orgprints.org/17108/1/fertilisation_azot%C3%A9e_courge_AB_2009.pdf

Samdyrkning er en lovende strategi
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne L.
Discussion of the intercropping technique for reduction of nitrate leaching in vegetables
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Air and water emissions; Vegetables.
Ano: 2016
URL: http://orgprints.org/32032/1/oekologi-erhverv-nr-601.pdf

Grønkål optager nitrat fra mere end 2 meters dybde
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
Grønsager kan efterlade meget nitrat i jorden efter høst. Det skyldes at de fleste grønsager kræver en stor tilførsel af kvælstof for at udvikle sig godt, og samtidig er nogle grønsager dårlige til at udnytte det tilførte kvælstof. Hertil kommer at der ofte efterlades kvælstofrige planterester i marken ved høst. De omsættes hurtigt og mineraliseres til nitrat, der risikerer at blive udvasket og dermed forurene vandmiljøet. Både mijømæssigt og agronomisk er det uhensigtsmæssigt at tabe nitrat fra jordbrugssystemet. Det skulle hellere bruges til at give et godt udbytte af afgrøderne - ikke mindst i økologiske dyrkningssystemer.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology; Farm nutrient management; Air and water emissions.
Ano: 2005
URL: http://orgprints.org/7917/1/7917.pdf

Organische Dünger in Topfkulturen auf dem Prüfstand -  wie steht es mit der Stickstofffreisetzung?
Provedor de dados: Organic Eprints
Autores: Koch, Robert; Emmel, M.; Lohr, D.; Frankenberg, Andrea; Degen, B.; Meinken, E.; Haas, HP.; Fischinger, Stephanie.
Matching nitrogen demand of plants and N release of organic fertilizers with respect to amount and timing is one key for successful cultivation of organic ornamentals. Thereby for plants with a low to moderate N demand growers can add the fertilizer as complete preplant application (CPA). For plants with a high N demand splitting fertilization in a reduced preplant application combined with an additional fertigation (RPA+F) is preferable. Aim of the current research was the investigation of N release of organic fertilizers in incubation experiments. Results of the incubation experiment were linked to a pot trial with pelargonium. Incubation experiments reveal that most  fertilizers release about 40 to 50 % of total N and most nitrogen is released within...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover; Air and water emissions.
Ano: 2017
URL: http://orgprints.org/31877/1/Organische%20D%C3%BCnger%20in%20Topfkulturen%20auf%20dem%20Pr%C3%BCfstand%20-.pdf

Steigerung der Naturnahrung zur Förderung einer nachhaltigen und ökologischen Produktion in der Karpfenteichwirtschaft (Verbundvorhaben)
Provedor de dados: Organic Eprints
Das hier beschriebene Verbundvorhaben umfasst folgende Teilprojekte: FKZ 15NA069 und FKZ 15NA079.  Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/id/saved_search/1628.  Karpfenteiche bieten durch die Bildung von Naturnahrung ein immenses Potential. Obwohl ein aus intrinsisch nachwachsenden Rohstoffen erzeugtes Lebensmittel Fisch maximale ökologische Nachhaltigkeit sowie beste Qualität gewährleistet und die traditionelle Teichwirtschaft Deutschlands langfristig fördern würde, wird diese natürliche Ressource heute bei Weitem nicht optimal genutzt. Mit geringerem Anteil an eiweißreicher Naturnahrung leidet zudem die Qualität des heimischen...
Tipo: Project description
Palavras-chave: Feeding and growth; Nutrient turnover; Air and water emissions; Health and welfare; Aquaculture.
Ano: 2023

Karbonlagring i jord er avhengig av både planter og jordliv
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun; Riley, Hugh.
Det er ikke så enkelt å lagre karbon i jord. Både i kjøkkenhagen og i bondens åker er karbonholdige molekyler ettertraktede energikilder og byggeråstoff for organismene i jorda. Karbon tilfører vi gjennom husdyrgjødsel, kompost, jorddekke og via røttene til levende planter. Bare en liten del av karbonet vi tilfører jorda, det som skjermes for omdanning i såkalt stabil humus, vil være igjen i jorda etter noen år. Et viktig resultat av biologisk aktivitet i jorda, både plantevekst og all annen aktivitet, er dannelse av humusmolekyler.   Det er fra naturens side ingen automatikk i å lagre store mengder karbon i jord hvor det samtidig produseres og høstes store avlinger. Karboninnholdet i jord bestemmes av likevekten mellom det som tilføres og det som brukes i...
Tipo: Web product
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Research methodology and philosophy; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/32877/1/karbonlagring-i-jord-ikke-lett-avhengig-av-bade-planter-jordliv

Methode zur standortangepassten Humusbilanzierung von Ackerland im Integrierten und Ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Kolbe, Dr. Hartmut.
In dieser Arbeit werden Grundzüge einer einfachen, standortangepassten Bilanzierungsmethode für Humus vorgestellt, die den heutigen Anforderungsprofilen im Integrierten und Ökologischen Landbau entsprechen.
Tipo: Conference paper, poster, etc.
Palavras-chave: Environmental aspects; Nutrient turnover; Crop husbandry; Soil quality.
Ano: 2006
URL: http://orgprints.org/8867/1/20060524_Poster_FeldtagRoda_Humus%2DMethode.pdf

Short-term residual N unaffected by forbs in grass-clover mixtures
Provedor de dados: Organic Eprints
Autores: Dhamala, NR; Rasmussen, J; Cong, WF; Carlsson, G; Søegaard, K; Eriksen, J.
We determined the effect on residual nitrogen (N) of including forbs (chicory, ribwort plantain and caraway) in perennial ryegrass-red clover mixtures. Although soil N inputs during the grassland phase differed markedly between mixtures, in a pot experiment we found no differences in the potentially mineralizable N of the soil or in the dry matter production and N content of the spring barley test crop. The fertilizer value of the grassland mixtures corresponded to 10 g N/m2, irrespective of forb inclusion. Thus, the inclusion of nonlegume forbs did not negatively affect short-term residual N fertility of legume-based grasslands.
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32973/1/Dhamala_et_al-2017-Soil_Use_and_Management.pdf

Dyrkning i planterester gavner udbyttet og agroøkosystemet
Provedor de dados: Organic Eprints
Annual report from DCA Aarhus University where SoilVeg is described
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage; Vegetables.
Ano: 2018
URL: http://orgprints.org/33592/1/SoilVeg%20articel%20in%20DCA%202017%20Annual%20Report_AU%20p%2032_June%202018.pdf

Ergebnisse von drei 40jährigen P-Dauerversuchen in Österreich: 2. Mitteilung: Auswirkungen unterschiedlicher P-Düngerformen und –mengen auf den P-Entzug und die P -Bilanzen
Provedor de dados: Organic Eprints
Autores: Lindenthal, Thomas; Spiegel, Heide; Mazorek, Manfred; Heß, Jürgen; Freyer, Bernhard.
In drei 40jährigen Dauerdüngungsversuchen wurden die Auswirkungen unterschiedlicher P-Düngermengen (0, 44 und 175 kg P / ha x a) und P–Düngerformen (Super-, Thomas- und Hyperphosphat) auf den P-Entzug und die P-Bilanzen ausgewertet. In den 40 Jahre nicht  gedüngten Parzellen konnten Entzüge bemerkenswerter Größenordnung (649–694 kg P/ha) und entsprechend stark negative Bilanzen festgestellt werden. Die mit 44 kg P/ha x a gedüngten Thomas- bzw. Superphosphat-Varianten zeigten im gesamten 40jährigen Versuchszeitraum deutlich höhere P-Entzüge als die ungedüngte Variante (diese Unterschiede waren in den letzten 20 Versuchsjahren auf allen 3 Standorten statistisch signifikant). Bei einem Düngungsstopp nach 20 Jahren blieben die jährlichen Entzüge hoch und...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2003
URL: http://orgprints.org/2485/1/Lindenthal_et_al_2003.pdf

Assessment of soil ecosystem in degraded areas of vineyards after organic treatments
Provedor de dados: Organic Eprints
Autores: Landi, S.; D'Errico, G.; Gagnarli, E.; Simoni, S.; Goggioli, D.; Guidi, S.; D'Avino, L.; Lagomarsino, A.; Valboa, G.; Castaldini, M.; Agnelli, A.E.; Fantappiè, M.; Lorenzetti, R.; Priori, S.; Costantini, E.A.C.
In Italian vineyards, it is quite common to have areas characterized by problems in vine health, grape production  and quality, often caused by improper land preparation before vine plantation and/or management. Causes for soil  malfunctioning can include reduced contribution of the soil fauna to the ecosystem services such as nutrient cycles  and organic matter turnover.  ReSolVe is a transnational and interdisciplinary project, supported by Core-Organic+ program, aimed at testing the  effects of selective agronomic strategies for restoring optimal soil functionality in degraded areas within organic  vineyard. For this purpose, the evaluation and biomonitoring of the abundance of soil mesofauna, nematodes  and microarthropods, represents an efficient tool...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Soil; Biodiversity and ecosystem services.
Ano: 2017
URL: http://orgprints.org/32424/1/EGU2017-7025.pdf

Entwicklung der Grundnährstoffgehalte und des pH-Wertes im Boden nach 10-jähriger Bewirtschaftung nach den Richtlinien des ökologischen Landbaus
Provedor de dados: Organic Eprints
Autores: Gruber, Harriet; Thamm, Uwe.
The following paper shows the impact of organic farming on the development of contents of phosphorus, potassium, magnesium and pH in the soil. The basis is a six-year crop rotation with animal manures (ca. 85 dt/ha/a) in the location of Gül-zow (Mecklenburg-Prepomerania). From 1993 to 2003 samples of soil were taken with aa soil auger in a depth between 0 and 30 cm. The discussion of changes in the nutrient contents are connected with nutrient balances. As a re-sult, organic farming does notnot lead to lower nutrient contents in soil. Only the content of potassium shows a decreasing tendency. The pH is atat a high level and the content of magnesium increases a little.   --  (Sprache des Volltextes: Deutsch)
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2004
URL: http://orgprints.org/5125/2/h33%2D03.pdf

Nitrat-Stickstoff-Gehalte im Boden in einer 6-feldrigen  Fruchtfolge
Provedor de dados: Organic Eprints
Autores: Gruber, H.; Thamm, U.; Michel, V.
In ökologisch bewirtschafteten Systemen ist Stickstoff häufig der begrenzende Wachstumsfaktor. Daher stehen Bemühungen um seine effektive Nutzung innerhalb der Fruchtfolge im Mittelpunkt vieler Untersuchungen. Diese Problematik ist besonders auf humusschwachen Sandstandorten Nordostdeutschlands von Bedeutung. Je sandiger der Boden desto geringer ist sein Wasser- und Nährstoffspeichervermögen. In der Folge steigt die Gefahr der Nährstoffauswaschung, was insbesondere den Stickstoff betrifft. Einerseits geht dem Betriebskreislauf dadurch Stickstoff verloren, andererseits erfolgt ein verstärkter Eintrag in den Wasserkreislauf.  Von 1993 bis 2002 wurden in einer 6-feldrigen Fruchtfolge am Standort Gülzow in Mecklenburg-Vorpommern auf dem ökologisch...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover; Crop combinations and interactions; Air and water emissions.
Ano: 2003
URL: http://orgprints.org/1146/1/1146%2Dgruber%2Dh%2Det%2Dal%2D2003%2Dnitrat%2D.pdf

Microbial biomass and cellulase activity in soils under five different cocoa production systems in Alto Beni, Bolivia
Provedor de dados: Organic Eprints
Autores: Alfaro-Flores, Adalid; Morales-Belpaire, Isabel; Schneider, Monika.
Cocoa is one of the most important crops of the ‘‘Alto Beni’’ region in Bolivia. This crop is produced in different systems, among them monoculture and agroforestry. In order to determine the effect of the production system on microbiological soil characteristics, we measured microbial biomass carbon, microbial biomass nitrogen and cellulase activity and we determined the microbial quotient in soil under five different cocoa production systems (conventional monoculture, organic monoculture, conventional agroforestry, organic agroforestry and successional agroforestry) and in fallow plots. The measurements were carried out in dry and rainy season. Soil from fallow plots and soil under agroforestry had higher microbial biomass than soils under monocultures,...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop husbandry; Bolivia.
Ano: 2015
URL: http://orgprints.org/30045/1/Alfaro-Flores-etal-2015-Agroforest%20Syst-onlinefirst.pdf

Ring i trynen garanterer ikke en lav N udvaskning fra søer på græs
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Ringning af søer er et kompromis i forhold til de økologiske principper om at tilgodese dyrenes adfærdsmæssige behov. Resultaterne viser, at selvom ringning har en positiv miljøeffekt, så er der andre forhold som er mindst ligeså vigtige for potentialet for tab af næringsstoffer.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Pigs; Air and water emissions.
Ano: 2005
URL: http://orgprints.org/10049/1/10049.pdf

Dschungel unter den Füßen Unterirdisches Leben bestimmt  das Funktionieren von Agrarökosystemen
Provedor de dados: Organic Eprints
Autores: van der Heijden, Marcel; Bender, Sophia; Wagg, Cameron.
This work demonstrates that soil biodiversity plays an important role in agroecosystems. The presence of an enriched soil community in large outdoor lysimeters  enhanced plant yield and reduced nutrient leaching losses. Moreover, soil biodiversity loss and simplification of soil communities reduced ecosystem multifunctionality.  Further analysis revealed that promotion of soil biodiversity and soil ecological engineering can help to reduce the reliance on external inputs and is especially  suitable for a transition to organic agriculture. This work points to the need to support soil life for a sustainable agriculture.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31954/1/Dschungel%20unter%20den%20F%C3%BCssen%20%E2%80%93%20Unterirdisches%20Leben.pdf

Stickstoff-Fixierleistung von Ackerbohnen in Reinsaat und  Gemengen auf Auenboden
Provedor de dados: Organic Eprints
Autores: Jung, Rüdiger; Rauber, Rolf.
In 2014 the N2 fixation of spring faba beans was elevated according to high grain yields, especially in pure stands. In 2015 grain yields and symbiotically fixed N2 were  on a low level due to stress (drought, aphids). Intercropping faba beans with oat in alternate rows evoked an increasing proportion of nitrogen derived from the atmosphere compared to faba beans in pure stands. N2 fixation of faba beans at  maturity did not differ significantly between deep ploughing and reduced tillage.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31558/1/Stickstoff-Fixierleistung%20von%20Ackerbohnen%20in%20Reinsaat%20und.pdf

N released from organic amendments is affected by soil management history
Provedor de dados: Organic Eprints
Autores: Palmer, M.; Cooper, J.M; Fließbach, A.; Melville, J.; Turnbull, C.; Shotton, P.; Leifert, C.
A ryegrass bioassay was conducted to investigate the effect of soil management history on nitrogen mineralisation from composted manure and pelleted poultry manure. Soils were used from 2 field experiments comparing conventional and organic/low input management systems.  When composted manure was added, soils  which had received high rates of composted FYM under biodynamic management released a greater amount of nitrogen for plant uptake than those with a history of mineral or fresh manure fertilisation, suggesting that biological preconditioning may result in greater efficiency of composted FYM as a nitrogen source for plants.  “Native” N mineralisation was found to be related to total soil N content.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2007
URL: http://orgprints.org/10398/1/palmer-etal-2007-soils_management_history.pdf

The importance of amino-N for humus formation studied by comparing amino-N input to the soil and soil total nitrogen content in long-term experiments
Provedor de dados: Organic Eprints
Autores: Schuler, Christiana; Raupp, Joachim; George, Eckhard.
Humus formation is thought to depend directly on carbon input. Referring to earlier studies we tested the role of amino-bound nitrogen (amino-N) input to the soil using data of 10 long-term experiments with different fertilization and crop rotation treatments. In 8 out of the 10 experiments there was a significant positive correlation between the amino-N input and soil total N content. This correlation was much stronger than the one of total N input and soil N content, indicating that amino-N was more important for soil N accumulation than total N input. Amino-N from farmyard manure seems to be more effective in this respect than amino-N from other organic fertilizers.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology; Soil quality.
Ano: 2008
URL: http://orgprints.org/11910/1/Schuler_11910_ed[1].doc

Nitrate leaching from organic farming systems with rotational grass-clover and arable crops
Provedor de dados: Organic Eprints
Autores: Berntsen, J.; Grant, R.; Olesen, J.E.; Kristensen, I.S.; Vinther, F.P.; Mølgaard, J.P.; Petersen, B.M.
Organic farming is considered an effective mean of reducing nitrogen losses compared with more intensive conventional farming systems. However, under certain conditions organic farming may also be susceptible to high nitrogen (N) losses. This is especially the case for organic dairy farms on sandy soils that use grazed grass-clover in rotation with cereals, which may lead to high rates of nitrate leaching.   A study was conducted on two commercial organic farms on sand and loamy sand soils. On each farm a three year old grass-clover field was selected. Half of the field was ploughed the first year and the other half was ploughed the next year. Spring barley (Hordeum vulgare L.) was sown after the spring ploughing. Measurements showed a low N leaching...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Pasture and forage crops; Farming Systems; Soil biology; Soil quality; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/4642/1/4642.doc

Effects of cutting frequency on plant production, N-uptake and N2 fixation in harvested and below-harvest plant biomass of grass clover
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
Nitrogen (N) accumulating in stubble, stolons and roots is an important component in N balances in perennial ryegrass-white clover swards, and the effects of cutting frequency on the biomass of above- and below-harvest height were studied during two consecutive years. Total dry matter (DM) and total N production, and N2 fixation, were measured at two cutting frequencies imposed in the summers of two years either by cutting infrequently at monthly intervals to simulate mowing or by frequent cutting at weekly intervals to simulate grazing. Total DM production harvested was in the range 3000 - 7000 kg DM ha-1 with lower DM production associated with the frequent cutting treatment, and it was significantly affected by the different weather conditions in the...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Pasture and forage crops; Farm nutrient management.
Ano: 2006
URL: http://orgprints.org/10066/1/10066.pdf

Lack of increased availability of root-derived C may explain the low N2O emission from low N-urine patches
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Klumpp, Katja; Xavier, Le Roux.
Urine deposition on grassland causes significant N2O losses, which in some cases may result from increased denitrification stimulated by labile compounds released from scorched plant roots. Two 12-day experiments were conducted in 13C-labelled grassland monoliths to investigate the link between N2O production and carbon mineralization following application of low rates of urine-N. Measurements of N2O and CO2 emissions from the monoliths as well as δ13C signal of evolved CO2 were done on day -4, -1, 0, 1, 2, 4, 5, 6 and 7 after application of urine corresponding to 3.1 and 5.5 g N m-2 in the first and second experiment, respectively. The δ13C signal was also determined for soil organic matter, dissolved organic C and CO2 evolved by microbial respiration. In...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/10145/1/10145.pdf

Umsatzprozesse und Optimierung der Nutzungseffizienz von Kompost und Hofdüngern im biologischen Landbau
Provedor de dados: Organic Eprints
Im biologischen Landbau haben organische Dünger eine besondere Bedeutung. Nährstoffe werden in Gemischtbetrieben aus der Tierhaltung auf die Flächen zurückgeführt und bilden das wesentliche Element einer gezielten Düngung. In viehlosen Biobetrieben könnten Komposte in Zukunft eine bedeutende Rolle in Bezug auf Nährstoffrezyclierung und Humusreproduktion spielen. Der Schwerpunkt der Forschung im Bereich Recycling- und Hofdünger lag in der Vergangenheit hauptsächlich im Bereich der Verlustminimierung bei Lagerung und Ausbringung (v.a. für N und P) und in Möglichkeiten eines gezielten Einsatzes in der Landwirtschaft. Dabei wurden vor allem die kurzfristigen Düngewirkungen berücksichtigt, die im wesentlichen auf die mineralischen bzw. sehr leicht...
Tipo: Project description
Palavras-chave: Nutrient turnover.
Ano: 2023
URL: http://orgprints.org/5105/1/Mayer%2D2005%2DUmsatzprozesse.pdf

Omsætning i jordpuljen på forskellige bedriftstyper
Provedor de dados: Organic Eprints
Autores: Petersen, B.M.; Berntsen, J.
Indlægget fokuserer på langtidseftervirkningen som et resultat af jordens dyrkningshistorie og anvender modellering som redskab.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/86/1/86.doc

Effecs of including forbs on N2-fixation and N yield in red clover-ryegrass mixtures
Provedor de dados: Organic Eprints
Autores: Dhamala, N.R.; Rasmussen, J.; Carlsson, G; Søegaard, K.; Eriksen, J.
Background: Legume biological nitrogen (N2)-fixation is stimulated by neighboring non-fixing species, but studies of legume N2-fixation in temporary grasslands including non-leguminous forage herb (forb) species are rare.   Methodology: We investigated N2-fixation and N yield in a range of species mixtures consisting of three forb species  chicory (Cichorium intybus L.), ribwort plantain (Plantago lanceolata L.) and caraway (Carum carvi L.)  mixed into a traditional perennial ryegrass (Lolium perenne L.) and red clover(Trifolium pratense L.) mixture at two fertilisation levels.   Results: The percentage of red clover N derived from the atmosphere (%Ndfa) was higher in mixtures than in pure stand, but did not increase with inclusion of forbs. Red clover...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/34966/1/10.1007_s11104-017-3554-9.pdf

GRAZING GREEN MANURES TO OPTIMIZE NITROGEN SUPPLY ON THE CANADIAN PRAIRIES
Provedor de dados: Organic Eprints
Autores: Cicek, Harun; Entz, Martin.
Grazing green manures may improve N availability and productivity in integrated crop-livestock systems. We hypothesized that grazing green manures, compared with standard soil incorporation with tillage, would increase autumn soil profile NO3-N concentrations. Experiments were carried out for three years between 2009 and 2011 in Manitoba, Canada. Seven different green manure crops or mixtures were grazed with sheep or left ungrazed. Hairy vetch, pea/oat mix and oats produced the greatest forage biomass in two out of three years. In 2010, sweet clover produced a similar amount (5813 kg ha-1).  Soybean and lentil failed to compete with weeds; containing 30 to 73% weed biomass in all years. Utilization by sheep for all crops ranged from 28% to 86% but the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Feeding and growth; Nutrient turnover; Biodiversity and ecosystem services; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/23500/1/23500_MM.pdf

Balanço do nitrogênio e fósforo em solo com cultivo orgânico  de hortaliças após a incorporação de biomassa de guandu.
Provedor de dados: Organic Eprints
Autores: Alves, Sandra Maria Campos; Abboud, Antonio Carlos de Souza; Ribeiro, Raul de Lucena Duarte; Almeida, Dejair Lopes de.
Os objetivos deste trabalho foram avaliar os efeitos de faixas de guandu (Cajanus cajan) e da incorporação da biomassa proveniente de sua poda na fertilidade do solo e na produtividade de três hortaliças sob cultivo orgânico. O delineamento usado foi de blocos casualizados completos em esquema de parcelas subsubdivididas com três repetições. As produtividades de beterraba, cenoura e feijão-de-vagem não foram afetadas pelos tratamentos. Nas parcelas onde não houve incorporação da biomassa de guandu, o balanço de nitrogênio no sistema foi negativo, ao passo que com a incorporação, esse balanço foi positivo. Embora tenha ocorrido balanço positivo para o fósforo nas parcelas sem a incorporação de biomassa de guandu, houve um aumento significativo na absorção...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Vegetables.
Ano: 2004
URL: http://orgprints.org/20349/1/Alves_balan%C3%A7o.pdf

Nitrogen leaching from organic agriculture and conventinal crop rotations
Provedor de dados: Organic Eprints
Autores: Benoit, Marie; Garnier, Josette.
The goal of our study is to investigate nitrogen leaching from organic agriculture, taking into account a complete organic rotation (6-9 years) and to compare the results with leaching from conventional systems. There are long time series on sub-root crop concentrations in conventional agriculture in the Seine Basin. These scored an average of 25 ± 4 mg N-NO3.l-1 (standard for drinking water is 11 mg N-NO3.l-1) in different types of soil, crops and climatic conditions. However, no data still exists for organic farming (OF) in this area. In 2012-2013, a total of eight practices of arable crops have been equipped with suction cups for all their rotations (5 in OF and 3 in CF), in three pedoclimatic situations, in order to determine concentrations and fluxes...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions; Farm nutrient management; Post harvest management and techniques.
Ano: 2014
URL: http://orgprints.org/23831/1/23831_MM.pdf

Nutrient excretion by outdoor pigs: a case study of distribution, utilisation and potential for environmental impact.
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Kristensen, K.
An increasing number of breeding sows is kept outdoors in Europe. Outdoor pig production has benefits in terms of animal welfare but may have hidden costs through nutrient losses. We investigated the distribution of nutrients in sow paddocks and the consequence for losses and utilisation in the succeeding crop. Significant correlation between soil inorganic N and the distance to feeding sites was observed after the paddocks had been used by lactating sows for 6 months (P&lt;0.01). Near to feeders inorganic N levels became extremely high whereas 30-40 m from feeders some patches had N levels in the topsoil corresponding to the levels in the reference area without sows. In the following spring only a minor part of inorganic N was still present in the top...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/150/1/paper.doc

COME RIPRISTINARE LE AREE DEGRADATE NEI VIGNETI
Provedor de dados: Organic Eprints
Autores: D'Avino, L.
Si è concluso a fine giugno il Progetto europeo ReSolVe, che ha: - selezionato 19 vigneti biologici in Italia, Francia, Spagna, Slovenia e Turchia; - individuato per ciascun vigneto le aree con una ridotta crescita della vite, bassa resistenza alle malattie e/o scarsa produzione di uva; - testato per 3 anni in modo interdisciplinare gli effetti della concimazione con compost, sovescio e pacciamatura secca con leguminose; -evidenziato vantaggi, criticità e alcuni suggerimenti pratici nell’adozione di ciascuna strategia.
Tipo: Newspaper or magazine article
Palavras-chave: Soil quality; Nutrient turnover; Soil; Viticulture.
Ano: 2018
URL: http://orgprints.org/33832/1/Georgofili_info_D%27avino.pdf

The contribution of grass and clover root turnover to N leaching
Provedor de dados: Organic Eprints
Autores: Rasmussen, Jesper; Helgadóttir, Á.; Frankow-Lindberg, B.; Loges, R.; Eriksen, J.
Sources of inorganic and organic N leaching from grass-clover mixtures at field sites in Denmark, Germany and Iceland were investigated. Grass or clover was labelled with 15N-urea four times (autumn 2007, spring, summer and autumn 2008) prior to the leaching season in autumn and winter 2008. Soil water was sampled at 30 cm depth and analyzed for 15N-enrichment of dissolved inorganic N (DIN) and dissolved organic N (DON). Most 15N was recovered in DON for both labelled grass and clover at all sites. At the Danish site, grass and clover contributed more to the DON pool than the DIN whereas the opposite was observed at the German and Icelandic sites. The results show that both clover and grass contribute directly to N leaching from the root zone in mixtures,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2010
URL: http://orgprints.org/17880/4/17880.pdf

The challenge of imbalanced nutrient flows in organic farming systems: A study of Organic greenhouses in Southern Germany
Provedor de dados: Organic Eprints
Autores: Zikeli, Sabine; Deil, Lucia; Möller, Kurt.
Organic greenhouse vegetable production is characterized by very high nutrient demands within short growing periods and high nutrient exports via products sold. Therefore, meeting crop nutrient demands and maintaining long-term sustainability in these systems is highly challenging. To gain insight in current practices this study assessed fertilization strategies and nutrient flows of ten organic horticultural farms (22 greenhouses and polytunnels) in Southwest Germany belonging to the two organic farming associations Bioland and Demeter (biodynamic) for a cropping period of three years. Soil samples were taken to analyze plant available phosphorus, potassium, soil organic carbon, pH and salinity. Crop rotations in the greenhouses were very diverse, though...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32922/1/Zikeli2017-The%20challenge%20of%20imbalanced%20nutrient%20flows%20in%20organic%20farming.pdf

Phosphor im Grünland – Antrieb der Leguminosen, aber Bremse der Phytodiversität?
Provedor de dados: Organic Eprints
Autores: Mahnke, B.; Wrage-Mönning, N.; Leinweber, P.; Müller, Jürgen.
In our study we investigated the effect of soil phosphorus (P) status on legume occurrence and on phytodiversity of organically managed permanent grassland sites. Therefore, we realized screenings on 2 m x 2 m plots with a clear spatial  differentiation between the functional groups ‘legumes’ and ‘non-legumes’ on five mown pasture sites under organic management in north-eastern Germany. We found no significant difference between the phosphorus content of aboveground biomass of legumes and the associated non-legume group. However, we detected a significant difference between the soil PDL contents of these two groups with lower contents in  soils of the legume patches whereas the different P fractions and thus different P availability on the mineral site...
Tipo: Conference paper, poster, etc.
Palavras-chave: Pasture and forage crops; Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31556/1/Phosphor%20im%20Gr%C3%BCnland%20%E2%80%93%20Antrieb%20der%20Leguminosen%2C%20aber.pdf

Umweltrelevante Aspekte von Winterzwischenfrüchten im ökologischen Marktfruchtbau unter Berücksichtigung der Kohlenstoff- und Stickstoffdynamik
Provedor de dados: Organic Eprints
Autores: Böldt, Matthias.
Die Agrar-Förderpolitik der letzten Jahre unterstützt zunehmend den Zwischenfrucht (ZF)-Anbau als multifunktionellen Ökosystemdienstleiter, insbesondere hinsichtlich der Vermeidung negativer Umwelteffekt und zur Verbesserung der Biodiversität der Agrarlandschaft. Demzufolge stieg der Anteil an Ackerflächen unter ZF in Deutschland. Im viehlosen Ökolandbau gilt allgemein die Integration von ZF als substantiell. Unter diesem Hintergrund wurde in ein zweijähriger Feldversuch in einer 6-gliedrigen ökologischen Fruchtfolge durchgeführt. Das Ziel der Studie ist die Identifzierung einer nachhaltigen Strategie für den ZF-Anbau unter norddeutschen Anbaubdingungen zu entwickeln. Unter Berücksichtigung der Faktoren Vorfrucht, Zwischenfruchtart (in Reinsaat und...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Post harvest management and techniques; Air and water emissions.
Ano: 2019
URL: http://orgprints.org/36147/1/Beitrag_220_final_a.pdf

Soil Stresses, Quality and Care
Provedor de dados: Organic Eprints
Autores: Elmholt, Susanne; Stenberg, Bo; Grønlund, Arne; nuutinen, Visa.
NJF-seminar Soil Stresses, Quality and Care    Different people understand differently the word soil. The soil can be looked upon as a body of nature and a part of the landscape. To many people soil is the substrate for plant growth and a prerequisite for food production and wealth. A third and perhaps growingly important view is soil as the physical ground for housings, roads and industry.    Soil is important to the whole society, not only for the agricultural sector. Soil has important ecological functions as it interacts with the dead bedrock, the atmosphere, the water, and the living organisms. Important functions are:    Biomass producer and transformer  Geomembrane, filter and buffer  Habitat for living organisms  Raw material and building ground...
Tipo: Proceedings
Palavras-chave: Production systems; Research methodology and philosophy; Farming Systems; Composting and manuring; Nutrient turnover; Soil quality; Soil tillage; Soil biology.
Ano: 2000
URL: http://orgprints.org/979/1/MailsamletDJFSE_rettet_Per_Bo.pdf

Kaliumdynamiken i jordbruksmark: kvantifiering av källor och sänkor och identifiering av jordar (områden) som behöver K-tillskott
Provedor de dados: Organic Eprints
Negativa kaliumbalanser har rapporterats från ekologiska gårdar med inriktning på vallintensiv växtproduktion. Avsikten med projektet är att bidra till utvecklingen av mer uthålliga produktionssystem för växtnäringsförsörjningen, särskilt vad gäller kalium (K) i valldominerade system. I marken frigörs K genom vittring av primära mineral. Vittringens bidrag till växternas kaliumförsörjning är utomordentligt viktigt för markens egenskaper som substrat för uthållig växtproduktion. I ett första försök att skatta vittringsbidraget använde vi data från långliggande bördighetsförsök i södra och mellersta Sverige, samt vittringsmodellen PROFILE. För att komma längre behöver vi säkrare data som bättre beskriver kinetiken för mineralvittring i jordbruksjordar. Detta...
Tipo: Project description
Palavras-chave: Nutrient turnover.
Ano: 2023

Eiweißstoffwechsel im Boden und Humusaufbau
Provedor de dados: Organic Eprints
Autores: Scheller, Edwin.
Die Eiweißgehalte der Ernte- und Wurzelrückstände und ihre Bedeutung für den Eiweißumsatz im Boden und den Humusaufbau.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality.
Ano: 2002
URL: http://orgprints.org/1373/1/1373%2Dscheller%2De%2D2002%2Deiweiss%2Dle.pdf

Wirkung verschiedener organischer Mulchmaterialien auf den Nährstoff- und Wasserhaushalt des Bodens - Quantifizierung der Bedeutung für den ökologischen Landbau
Provedor de dados: Organic Eprints
Bisherige Untersuchungen zum Einfluss des Mulchens wurden häufig ohne quantitative Bezugnahme zum Nährstoff- und Wasserhaushalt durchgeführt. So liegt noch keine mengenmäßige Beschreibung für die Änderung im Wasserhaushalt beim Vergleich verschiedener Mulchmaterialien vor. Partielle Untersuchungen haben meist nur eine Art Mulchmaterial zum Gegenstand bzw. werden nur aus Sicht des Mulchens und dem einhergehenden Vorteilen, wie z.B. Erosionsschutz, Schutz gegen Sonnen- einstrahlung und Wind, Förderung der Krümelbildung geschildert. Mit dem Vorhaben soll den zeitbezogenen Anforderungen, nämlich der Komplexbetrachtung und quantitativen Bewertung jedoch mehr als bisher entsprochen werden, da auch Voruntersuchungen die Notwendigkeit der beschriebenen...
Tipo: Project description
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2023

Umsatz und Wirkung vegetabiler Düngemittel im Ökologischen Gemüseanbau
Provedor de dados: Organic Eprints
Autores: Müller, Dr. Torsten; von Fragstein und Niemsdorff, Prof. Dr. Peter.
In diesem Projekt sollten verschiedene vegetabile Düngemittel hinsichtlich ihrer Stickstoff-Düngewirkung im ökologischen Gemüseanbau als Alternative zu organischen Düngemitteln tierischer Herkunft untersucht werden.  Folgende Düngemittel wurden untersucht:   (1) In Inkubationsversuchen bei 5 und 15°C Ackerbohnenschrot (Vicia faba L., Körnerschrot), Körnerschrote der Gelben und der Weißen Lupine (Lupinus albus L. und Lupinus luteus L.), Bio-Vegetal®, Phytoperls®, Rizinusschrot (Ricinus communis L., Körnerschrot) als gebräuchlicher vegetabiler Importdünger und Hornmehl als Referenzdünger tierischer Herkunft;   (2) in Gefäßversuchen Ackerbohnenschrot, Körnerschrot der Gelben Lupine, Phytoperls®, Rizinusschrot und Hornmehl;   (3) in Feldversuchen...
Tipo: Report
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2003
URL: http://orgprints.org/6957/1/02OE169%2Dmueller%2Dt%2D2003%2Dumsatz%2Dduenger.pdf

A row cropping system with cover crops for balancing weed and soil fertility management in organic cereal production
Provedor de dados: Organic Eprints
Autores: Phan, Hong TT; Thorup-Kristensen, Kristian.
This manuscript shows the result from testing the new row cropping system for its ability to produce a balanced combination of inter-row hoeing and undersown cover crop in order to obtain a sufficient N supply and an effective weed control as well as to identify optimal sowing time for high biomass production and cover crop species suited for late undersowing. The new system produced a sufficient N supply and an acceptable weed control effect, leading to an improvement in the subsequent crop yield. Yield in this system is potentially improved further because some managements are suggested to increase its weed control effect, especially for the perennial creeping thistle cirsium arvense.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Research communication and quality; Biodiversity and ecosystem services; Farm nutrient management; Europe.
Ano: 2019
URL: http://orgprints.org/35191/1/Manuscript-rowcrop%20system.pdf

Guidelines for standardized soil sampling and analyses
Provedor de dados: Organic Eprints
Autores: Zikeli, Sabine; Polverigiani, Serena; Holz, Thomas; Neri, Davide; Kelderer, Markus; Malusa, Eligio.
The document contains common guidelines adopted in the project for soil analysis
Tipo: Other
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2019
URL: http://orgprints.org/35576/1/DOMINO_Guidelines%20for%20standardized%20soil%20sampling%20and%20analysis.pdf

Leaching of organic nitrogen and carbon after cultivating grass-clover pastures
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.; Hansen, E.M.; Eriksen, J.
Leaching of organic nitrogen (DON) and carbon (DOC) was measured after cultivating grass-clover of different age. It was found that DON and escpecially DOC was lost in considerable amounts, and that the leaching depends upon crop and management. The highest concentrations of DON were measured in the bare soil treatment, whereas concen-trations in catch crop treatments were between 1.2 and 3.2 mg N L-1. The leaching of DOC showed opposite trends compared to leaching of DON with higher values in the catch crop treatments (296 - 310 kg DOC ha-1) than in bare soil treatments (174 - 217 kg DOC ha-1).
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Pasture and forage crops; Air and water emissions.
Ano: 2005
URL: http://orgprints.org/5374/1/5374.pdf

Nitrogen mineralization from clover leaves: Effect of soil type and low temperature
Provedor de dados: Organic Eprints
Autores: Bleken, Marina Azzaroli; Hansen, Sissel; Frøseth, Randi Berland.
The period following the incorporation of N-rich leys into soil is crucial both for the N supply to the following crop and for the risk of N leaching. Soil-crop models used for exploring the possibility of improving the nitrogen recovery, generally assume that there is a stoichiometric relationship between carbon and nitrogen mineralization. Our aim was to study how temperature and soil type affect the net N mineralization relative to C mineralization of plant litter incorporated in soil. This knowledge is instrumental for improving the modelling of nitrogen dynamics after ploughing.  The experiment confirmed that N mineralization of N-rich plant material occurs even at 0 °C, and that the ratio of net mineralized N to mineralized C is larger at lower than...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2016
URL: http://orgprints.org/31208/1/Bleken%20et%20al.%202016.%20NITROGEN%20MINERALIZATION%20FROM%20CLOVER%20LEAVES_%20Effect%20of%20soil%20type%20and%20low%20temperature_%2019th%20N-workshop%2C%2027-29%20June%2C%20Skara%20Sweden%2C%20pp%20255-256..pdf

A model analysis on nitrate leaching under different soil and climate conditions and use of catch crops
Provedor de dados: Organic Eprints
Autores: Pedersen, Anders; Stoumann Jensen, Lars; Thorup-Kristensen, Kristian.
The use of crops and catch crops with deep rooting can strongly improve the possibility of retaining nitrate-N that will otherwise be leached to the deeper soil layers and end up in the surrounding environment. But will it always be an advantage for the farmer to  grow a catch crop? This will depend on factors such as soil mineral nitrogen level, soil water holding capacity, winter precipitation, rooting depth and N demand of the scceeding crop. These factors interact, and it can be very difficult for farmers or advisors to use this information to decide whether growing a catch crop will be beneficial. To analyse the effect of catch crops under different Danish soil and precipitation conditions, we used the soil, plant and atmosphere model Daisy.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Post harvest management and techniques; Crop combinations and interactions; Farm nutrient management; Soil quality.
Ano: 2005
URL: http://orgprints.org/7831/1/7831.pdf

Untersuchungen zur optimalen Produktion und pflanzenbaulichen Verwertung von Biogut- und Grüngutkompost im ökologischen Landbau (Verbundvorhaben)
Provedor de dados: Organic Eprints
Das hier beschriebene Verbundvorhaben umfasst folgende Teilprojekte: FKZ 18OE009, FKZ 18OE118, FKZ 18OE119, FKZ 18OE120 und FKZ 18OE122.  Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/id/saved_search/1753.  Das Projektziel ist wissenschaftliche und verfahrenstechnische Grundlagen zu schaffen, um gütegesicherte Qualitätskomposte (Biogut und Grüngut) verstärkt im Ökolandbau einzusetzen und eine nachhaltige Wirtschaftsweise zu unterstützen. Das Einsatzpotenzial von Biogut- und Grüngutkompost wird derzeit nur unzureichend ausgeschöpft, obwohl ein hoher Bedarf an Makro- und Mikronährstoffen besteht. Insbesondere sollen die Untersuchungen dazu...
Tipo: Project description
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2023

Verkenningen organische stof; Proefbedrijf Vredepeel
Provedor de dados: Organic Eprints
Autores: Hospers-Brands, A.J.T.M.; Burgt, Geert-Jan H.M.
Binnen het project "Bodemkwaliteit op Zand" heeft het Louis Bolk Instituut verkenningen uitgevoerd naar de effecten van een jaarlijkse compostgift op de bodemkwaliteit: organische stof gehalte, beschikbaarheid van stikstof voor de gewassen en verliezen van stikstof. Daarvoor is gebruik gemaakt van het stikstofmodel NDICEA. NDICEA berekent op basis van gegevens over bodem, gewassen, bemesting en weergegevens hoe de organische stof dynamiek verloopt en hoe ten gevolge daarvan stikstof in de bodem vrijgemaakt, vastgelegd en door gewassen opgenomen wordt. In het project, uitgevoerd op de PPO-locatie Vredepeel worden drie teeltsystemen met elkaar vergeleken: een biologisch systeem en twee geïntegreerde systemen, waarvan een met een normale aanvoer van...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Soil; Farm nutrient management.
Ano: 2013
URL: http://orgprints.org/26764/1/2813.pdf

Spatial variability of microbial indicators and assessment of tillage systems on the soil microbiological functioning on organic farming.
Provedor de dados: Organic Eprints
Autores: VIAN, Ph D Jean François; PEIGNE, Dr Joséphine; CHAUSSOD, Dr Rémi; DAVID, Dr Christophe; ROGER-ESTRADE, Pr Jean.
Reduction tillage, in modifying the soil microorganisms’ environment, modifies their potential to supply plants nutrients. This is of primary importance in organic farming as the nutrients availability is mainly dependent on the organic matter degradation by microorganisms. To study the effect of tillage on soil physical and microbiological properties, we compare 4 tillage practises (deep and shallow ploughing, chisel and no tillage) in an experimental field near Lyon. Our objective is to link a structural statement with a microbiological functioning in order to study the microorganisms’ abilities to supply nitrogen and phosphorus. For such studies, it is of primary importance to use a convenient sampling design as the microbiological properties are highly...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology; Soil quality.
Ano: 2006
URL: http://orgprints.org/7635/1/Tillage_and_nutrition.pdf

Viehhaltung im Ökologischen Landbau - ja oder nein?  Effekte auf Bodenfruchtbarkeit, N-Bilanzen und Erträge
Provedor de dados: Organic Eprints
Autores: Schulz, Franz; Brock, Christopher; Leithold, Günter.
An organic long-term field experiment with two factors has been carried out since 1998 at the experimental station Gladbacherhof, University of Giessen. Effects of different farm types (with and without lifestock raising) combined with tillage treat-ments on plants, soil and environment have been investigated. This article presents results on soil fertility, N-balances and cash crop yields according to the farm system. All in all, the superiority of a management system with cattle over stockless organic farming is demonstrated. The mixed farm type led to higher amounts of humus in the soil, lower N-losses and higher yields. Unless stockless farming cannot be avoided a mulched grass-legume ley, in combination with grain- and fodder legumes as main or...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover.
Ano: 2013
URL: http://orgprints.org/21379/1/21379_Schulz.pdf

Dauerversuch zur P- und K-Grunddüngung im Ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Kolbe, Dr. Hartmut.
In einem Dauerversuch wird der Einfluss steigender organischer sowie mineralischer P- und K-Düngung auf Merkmale der Bodenfruchtbarkeit, Ertrag und Qualität der Kulturarten einer Fruchtfolge untersucht. Es soll geprüft werden, welche löslichen Bodengehalte an P und K für ein angemessenes Ertragsneiveau als ausreichend angesehen werden können. In diesem Poster werden Ergebnisse der ersten Fruchtfolgerotation vorgestellt.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/8865/1/20060523_Poster_FeldtagRoda_Grundduengung.pdf

Initial soil formation in an agriculturally reclaimed open-cast mining area - the role of management and loess parent material
Provedor de dados: Organic Eprints
Autores: Pihlap, Evelin; Vuko, Miljenka; Lucas, Maik; Steffens, Markus; Schloter, Michael; Vetterlein, Doris; Endenich, Manuel; Kögel-Knabner, Ingrid.
After reclamation of open-cast mining pits, soil formation starts from the deposited calcareous loess characterised by its basic physical and chemical properties whereas soil biology and structure need to develop to achieve a fully functional soil. In this study we used a chronosequence approach to elucidate soil formation on agriculturally reclaimed loess soils in an open-cast lignite mining area in Garzweiler (Germany). We selected six fields aged 0, 1, 3, 6, 12, and 24 years after the first seeding in order to observe the initial stage of development of soil properties and assess the role of management with conventional crop rotation in soil structure formation and soil organic carbon (SOC) accumulation. Loess parent material had a strong impact on...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2019
URL: http://orgprints.org/35361/1/pihlap_etal_2019_soil_tillage-research-Vol191-p224-237.pdf

Svovl til husdyrgødet vårbyg og forfrugtseffekt af græsmarker
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
1. Svovl til husdyrgødet vårbyg  For 20-30 år siden udgjorde nedfaldet af S fra atmosfæren op imod 40 kg/ha om året. En reduktion af forureningen fra afbrænding af olie og kul har sænket dette til under 10 kg, og planterne har derfor i dag et reelt behov for supplerende tilførsel af S. Der har dog været tvivl om nødvendigheden af S-tilførsel til husdyrgødet vårbyg, og i en række forsøg er der ikke opnået signifikante merudbytter. Det skal her kort opridses hvilke faktorer, som har betydning for hvornår S-tilførsel er nødvendigt.  Det totale svovlindhold i kvæg- og svinegylle afhænger af tørstofindholdet (figur 1) og udgør typisk 0,2-0,7 kg S pr. ton. Forsøg i raps har tidligere vist at plantetilgængeligheden af S i gylle er meget lav. Kun 5-7% af gyllens...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/1412/1/Bilag_JE.doc

Nitrogen fixation and transfer in grassclover leys under organic and conventional cropping systems
Provedor de dados: Organic Eprints
Autores: Oberson, A.; Frossard, E.; Bühlmann, C.; Mayer, J.; Mäder, P.; Lüscher, A.
Background and aim  Symbiotic dinitrogen (N2) fixation is the most important external N source in organic systems. Our objective was to compare symbiotic N2 fixation of clover grown in organically and conventionally cropped grass-clover leys, while taking into account nutrient supply gradients.  Methods  We studied leys of a 30-year-old field experiment over 2 years in order to compare organic and conventional systems at two fertilization levels. Using 15N natural abundance methods, we determined the proportion of N derived from the atmosphere (PNdfa), the amount of Ndfa (ANdfa), and the transfer of clover N to grasses for both red clover (Trifolium pratense L.) and white clover (Trifolium repens L.).   Results  In all treatments and both years, PNdfa was...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2013
URL: http://orgprints.org/23228/1/Oberson-etal-2013-PlantansSoil-onlinefirst.pdf

Bodenfruchtbarkeit verbessern
Provedor de dados: Organic Eprints
Autores: Mäder, Paul; Krauss, Maike.
Der Erhalt und die Mehrung des Humusgehaltes sind im Fokus der Bewirtschaftung biologisch-dynamischer Höfe. Langzeitversuche am FiBL haben gezeigt, dass die Anwendung von kompostiertem Mist und die reduzierte Bodenbearbeitung einen substanziellen Beitrag zur Humusmehrung leisten und das Bodenleben fördern.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Soil tillage.
Ano: 2017
URL: http://orgprints.org/32115/1/maeder-krauss-2017-bodenfruchtbarkeit-verbessern-LebendigeErde_04_p38-41.pdf

Verkenningen organische stof: Proefbedrijf Vredepeel
Provedor de dados: Organic Eprints
Autores: Hospers-Brands, A.J.T.M.; Burgt, Geert-Jan H.M.
Binnen het project "Bodemkwaliteit op Zand" heeft het Louis Bolk Instituut verkenningen uitgevoerd naar de effecten van een jaarlijkse compostgift op de bodemkwaliteit: organische stof gehalte, beschikbaarheid van stikstof voor de gewassen en verliezen van stikstof. Daarvoor is gebruik gemaakt van het stikstofmodel NDICEA. NDICEA berekent op basis van gegevens over bodem, gewassen, bemesting en weergegevens hoe de organische stof dynamiek verloopt en hoe ten gevolge daarvan stikstof in de bodem vrijgemaakt, vastgelegd en door gewassen opgenomen wordt. In het project, uitgevoerd op de PPO-locatie Vredepeel worden drie teeltsystemen met elkaar vergeleken: een biologisch systeem en twee geïntegreerde systemen, waarvan een met een normale aanvoer van...
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2013
URL: http://orgprints.org/24689/1/2813.pdf

Restmaterialer fra bio-energiproduktion - kan de tilbageføres til marken?
Provedor de dados: Organic Eprints
Autores: Johansen, Anders; Hansen, Christian M.; Carter, Mette S.
Efluents from biogas production may be recycled to soil as plant nutrition. However, the proportion of plant-available nitrogen is high and may cause loss due to leaching or gaseous emissions. Hence, such waste stream materials must be applied with care to ensure maximum plant uptake to minimize loss. Spread of weed seeds via application of biogas effluents is only a problem when the digestion is performed at mesophilic conditions and when the seeds are staying less than a week in the plant. At thermophilic conditions, seeds from a range of weed plant were unable to germinate efter just a few days.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Farm nutrient management; Weed management; Soil quality; Health and welfare; Composting and manuring; Air and water emissions.
Ano: 2010
URL: http://orgprints.org/16902/1/16902.pdf

In field N transfer, build-up, and leaching in ryegrass-clover mixtures
Provedor de dados: Organic Eprints
Autores: Rasmussen, J; Eriksen, J; Jensen, E S; Høgh-Jensen, H.
Two field experiments investigating dynamics in grass-clover mixtures were conducted, using 15N- and 14C-labelling to trace carbon (C) and nitrogen (N) from grass (Lolium perenne L.) and clover (Trifolium repens L. and Trifolium pratense L.). The leaching of dissolved inorganic nitrogen (DIN), as measured in pore water sampled by suction cups, increased during the autumn and winter, whereas the leaching of dissolved organic nitrogen (DON) was fairly constant during this period. Leaching of 15N from the sward indicated that ryegrass was the direct source of less than 1-2 percent of the total N leaching measured, whereas N dynamics pointed to clover as an important contributor to N leaching. Sampling of roots indicates that the dynamics in smaller roots were...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/14647/1/Full_length_paper_Jim_Rasmussen.pdf

Recuperação em área de empréstimo usada para construção de usina hidrelétrica.
Provedor de dados: Organic Eprints
Autores: Alves, Marlene C.; Nascimento, Vagner do; Souza, Zigomar M. de.
A recuperação de áreas de empréstimo usada para construção de hidrelétricas é um processo lento que requer o uso de plantas de cobertura, como fonte de matéria orgânica e a aplicação de nutrientes e corretivos como condicionadores dos atributos do solo. Portanto, objetivou-se, com este trabalho, estudar a recuperação de atributos físicos do subsolo de um Latossolo Vermelho distrófico, utilizado no terrapleno e fundação da Usina Hidrelétrica de Ilha Solteira, SP. O delineamento utilizado foi em blocos casualizados com oito tratamentos e quatro repetições. A pesquisa foi implantada em 1992. Os tratamentos se constituíram do uso de adubos verdes, braquiária e correção do solo. Após 13 anos foram avaliados: porosidade total do solo, macroporosidade,...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Soil.
Ano: 2012
URL: http://orgprints.org/29011/1/Alves_Recupera%C3%A7%C3%A3o.pdf

Die Vorteile des Öko-Landbaus für das Klima
Provedor de dados: Organic Eprints
Autores: Fliessbach, Andreas; Schmid, Heinz; Niggli, Urs.
Die Landwirtschaft ist durch die Produktion von Kohlendioxid, Lachgas und Methan mitverantwortlich für die Klimaerwärmung. Humusreiche Bio-Böden können das Klima jedoch entlasten.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Biodiversity and ecosystem services; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/13031/1/fliessbach%2D2008%2DOeL%2D145.pdf

DOC trial: diversity and metabolic effiency of microbial communities in organic and conventional soils
Provedor de dados: Organic Eprints
Autores: Fliessbach, Andreas; Mäder, Paul.
Soil microbiota are favoured by organic farming systems. Moreover they were found to need less energy fore their maintenance. The diversity of microbial functions was also increased. Our results support the hypothesis that diverse populations make better use of the available resources.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality; Soil biology.
Ano: 2000
URL: http://orgprints.org/2912/1/fliessbach%2Dmaeder%2D2000%2Ddoc.pdf

Stickstoffeffizienz von unterschiedlich aufbereiteten Misten in einer Ackerbaufruchtfolge auf Lösslehm
Provedor de dados: Organic Eprints
Autores: Berner, Alfred; Scherrer, Daniel; Alföldi, Thomas.
Schlussfolgerungen  Unter der Einschränkung, dass die alleinige Betrachtung der N-Wirkung nur einen Teil des N-Haushaltes ausmacht (z.B. Einbau von N in den Humuskörper), können aus den vorliegenden Ergebnissen folgende Schlussfolgerungen gezogen werden:  • Bei der aeroben Rotte bzw. Kompostierung von Mist wurden im Vergleich zur anaeroben Lagerung von Mist grössere N-Verluste gemessen, d.h. es wurde bei diesen Verfahren folglich weniger Stickstoff auf die Parzellen ausgebracht.  • Bei der Anwendung auf dem Feld erzielten Rottemist und Mistkompost im Vergleich zu Stapelmist jedoch eine bessere N-Wirkung. Dies macht deutlich, dass bei der Beurteilung unterschiedlicher Mistformen neben N-Verlusten und N-Gehalten insbesondere die N-Wirkung...
Tipo: Book chapter
Palavras-chave: Composting and manuring; Nutrient turnover; Soil quality; Soil biology.
Ano: 1997
URL: http://orgprints.org/2909/1/berner%2Det%2Dal%2D1997%2Dstickstoffeffizienz.pdf

POSTER Einfluss der Zugabe von Rohphosphat in den Biogasfermenter auf die Düngewirkung fermentierter Rindergülle
Provedor de dados: Organic Eprints
Autores: Möller, Kurt.
1. N-Nachwirkung vergorener und nicht vergorener Rindergülle vergleichbar, höhere N-Direktwirkung bei vergorener Gülle.  2. Verfügbarkeit von P und N steigt durch Vergärung proportional zueinander.  3. Aufschluss von Rohphosphaten durch Zwischenprodukte der Methanisierung wurde nicht erzielt.   4.      Rohphosphate bewirken sign. Ertragssteigerung durch N-Mobilisierende Wirkung.  5. Zugabe von leicht abbaubarem organischen Material (Zucker): sign. höhere Verfügbarkeit von N aus dem Grundsubstrat Gülle, die Verfügbarkeit des Phosphors stieg nicht proportional dazu.
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/1009/2/moeller%2Dbiogas%2Dgefaessversuch%2Dwien.pdf

Evaluation of pre-crops and fertilization on organic zucchini under Mediterranean conditions: case of Turkey
Provedor de dados: Organic Eprints
Autores: Bilen, Emre.
Soil fertility is fundamental in determining the productivity of all farming systems. Major tools utilized in organic farming to increase the fertility of the soil can be expressed as rotation, green manuring and allowed organic fertilizers and soil amendments. A field experiment was conducted at Ege University in Izmir, Turkey, to study the effects of pre-crops used as green manure - including vetch, faba bean, broccoli and spontaneous weeds - and fertilization (compost tea, commercial fertilizer) on zucchini (the main crop in the rotation program) and on soil fertility. The main aim of the experiment was to identify the most suitable rotation program in organic farming for Turkey under prevailing conditions. Tested treatments had no marked effect on...
Tipo: Thesis
Palavras-chave: Farm economics; Nutrient turnover; Biodiversity and ecosystem services; Farm nutrient management.
Ano: 2008
URL: http://orgprints.org/20525/1/emre%20bilen%20master%20thesis.pdf

Schnittgutabfuhr oder Gründüngung? Auswirkung der Kleegras-Nutzung auf Nitrat im Sickerwasser und Folgefrüchte
Provedor de dados: Organic Eprints
Autores: Dreymann, Sonja; Loges, Ralf; Taube, Friedhelm.
A field experiment was conducted to evaluate the impact of different management systems of grass-clover (various cutting and/or mulching combinations) and date of ploughing (autumn or spring) on the fate of nitrogen (N) and the yield of succeeding wheat. The 3-cut system resulted in nitrate losses below the limit of the EC Nitrate Directive (91/676/EEC), even with ploughing in autumn. When ploughed in spring, treatments with frequent cutting and/or mulching induced nitrate leaching below the critical value. In contrast, losses from swards mulched only once were considerably above the threshold value, independently of ploughing time. With swards mulched and ploughed in autumn, nitrate concentrations exceed the EC-limit. The management of grass-clover swards...
Tipo: Conference paper, poster, etc.
Palavras-chave: Pasture and forage crops; Nutrient turnover; Composting and manuring; Air and water emissions.
Ano: 2005
URL: http://orgprints.org/3700/1/3700.pdf

Jordlevende sopp
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun; Ruissen, T.; Joner, Erik.
Jordlevende sopp vokser som lange trådformede strukturer kalt hyfer. Når flere hyfer vokser sammen dannes et hvitaktig mycel som vi kan se med det blotte øye. Sopp har ikke klorofyll og må derfor skaffe seg næring på annet vis. Det gjør de ved å hente næring fra organisk materiale  i jorda, fra å bryte ned ferske planterester på overflaten og/eller ved å leve i samliv (symbiose)med levende planterøtter (bildet. Selv om man kan se store og små sopper på overflaten, er det alltid slik at mesteparten av soppen finnes under jordoverflaten.
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Soil.
Ano: 2011
URL: http://orgprints.org/30208/1/TEMA_6_18_Sopp%20endelig.pdf

Planteproduktion og miljø på store økologiske kvægbrug
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Askegaard, M; Søegaard, K; Hansen, E M.
Store besætninger kræver meget græs tæt på gården. Udnyttelse og tab af kvælstof i græsintensive sædskifter kan delvis kontrolleres vha. management
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/14643/1/V3_1_Planteproduktion_store_%C3%B8kobrug.doc

DCA Newsletter AU: Intensiv grøntsagsproduktion på plantebaseret gødning
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne Lakkenborg.
Description of the DoubleCrop project and its wider perspectives.
Tipo: Web product
Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover; Soil tillage; Air and water emissions; Vegetables; Root crops.
Ano: 2018
URL: http://orgprints.org/35458/3/index.html

Improving supply and phosphorous use efficiency in organic farming systems
Provedor de dados: Organic Eprints
Autores: Walker, R L; Watson, C A; Rees, R M; Stockdale, E A.
Phosphorus (P) is an essential plant nutrient that needs to be managed carefully in organic systems so that crop yield and quality remain sustainable without contributing to environmental damage, particularly that associated with eutrophication. Under organic regulations, minimally processed rock phosphate (PR) can be used to amend low P fertility soils, although the solubility is extremely low at optimum soil pH for most crop growth (pH 6.5). This paper describes a project (PLINK) which aims to develop methods of improving P efficiency on organic farms, although the same approaches may also be applicable on conventional and low-input farms. The methodologies that the project is developing include the fermentation and composting of crop waste material with...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/10260/1/Improving_supply_and_phosphorus_use_efficiency_in_organic_farming_systems.pdf

Einfluss der ökologischen Bewirtschaftung auf die Nitratstickstoffgehalte im Boden
Provedor de dados: Organic Eprints
Autores: Gruber, Harriet; Thamm, Uwe; Michel, Volker.
The following paper discribe the influence of ecological managed systems on contents of nitrate-nitrogen in soils. From 1993 to 2003 in a six-year crop rotation in the location of Gülzow (Mecklenburg-Vorpommern) samples of soil were taken with an soil auger in a depth between 0 and 90 cm. Nitrate-nitrogen contents was analyzed by hydrazin reduction in an analysing automat (SKALAR). For statistical evaluation SAS (Statistical Analysis System) and for clearing of unorthogonal data procedure MIXED of PIEPHO and MICHEL (2001) were used.  The results show that contents of nitrate-nitrogen in autumn and spring are lower for organic management than for conventional. Nitrogen losses during winter are subjected to heavy annual variations. High contents of...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/5129/1/h33%2D08.pdf

Field emissions of N2O during biomass production may affect the sustainability of agro-biofuels
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Hauggaard-Nielsen, Henrik; Heiske, Stefan; Thomsen, Sune T.; Jensen, Morten; Schmidt, Jens Ejbye; Johansen, Anders; Ambus, Per.
Field emissions of N2O during cultivation of bioenergy crops may counterbalance a considerable part of the avoided fossil CO2 emissions that are achieved by fossil fuel displacement
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2011
URL: http://orgprints.org/18332/4/18332.pdf

Ciclagem de nutrientes por àrvores em sistemas agroflorestais na Mata Atlântica.
Provedor de dados: Organic Eprints
Autores: Duarte, Edivânia Maria Gourete.
Os sistemas agro florestais são efetivos em melhorar e conservar a qualidade do solo. As árvores presentes nestes sistemas absorvem nutrientes de camadas profundas do solo e aportam continuamente material orgânico, gerando impactos à superfície e abaixo da superfície do solo. O objetivo deste trabalho foi estudar características envolvidas na cidagem de nutrientes de espécies arbóreas, visando contribuir para a formulação de estratégias de manejo de sistems agroflorestais. As espécies selecionadas para o estudo foram o ipê-preto (Zeyheria tuberculosa), o açoita-cavalo (Luehea grandiflora), o mulungu (Erythrina verna), o fedegoso (Senna macranthera), o ingá (Ingá subnuda), o papagaio (Aegiphila sellowiana) e o abacate (Persea americana). A produção de...
Tipo: Thesis
Palavras-chave: Farm economics; Nutrient turnover; Social aspects; Soil tillage; Farm nutrient management.
Ano: 2007
URL: http://orgprints.org/21742/1/Duarte_Ciclagem.pdf

Nitrate leaching from silage maize
Provedor de dados: Organic Eprints
Autores: Hansen, E.M.; Eriksen, J.
During the last 20 years the area with maize in Denmark has increased dramatically and reached 163,000 ha in 2008. Silage maize is easy to grow, is a suitable fodder for cows and goes well with grass-clover in the diet. This means that silage maize is often found in crop rotations with grass-clover on sandy soils in western Denmark. The ploughing in of grass-clover fields poses a serious risk of increased nitrate leaching on a coarse sandy soil, even when carried out in spring. With increased maize cropping, there is therefore a need for strategies to reduce nitrate leaching after ploughing of grass-clover.In the ICROFS project, OrgGrass, we examined the effect of catch crop and slurry application on nitrate leaching from maize after a spring-ploughed...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/17876/1/17876.pdf

Kväveförsörjning i ekologiska odlingssystem med vall - höstraps - vete.
Provedor de dados: Organic Eprints
Autores: Engström, Agr Lena; Lindén, AgrD Börje.
I fem treåriga fältförsök (2001-2006), belägna i Bohuslän och Halland, studerades efterverkan av klövergräsvall, utnyttjad som slåttervall och gröngödslingsvall, vid odling av höstraps som efterföljande gröda. I en av tre behandlingar av vallen togs två skördar, innan vallen bröts efter andraskörden. I ett annat led togs första skörden tillvara, medan återväxten plöjdes ned vid tidpunkten för andraskörden. I den tredje behandlingen utnyttjades vallen helt för gröngödsling, med en putsning vid tiden för första vallskörden. Efter vallbrottet såddes höstraps. Vidare undersöktes i vilken utsträckning flytgödseltillförsel till höstrapsen på våren förbättrade dess kväveförsörjning och avkastning. Efterverkan av vallen och höstrapsen studerades efter...
Tipo: Report
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Soil tillage.
Ano: 2008
URL: http://orgprints.org/13095/1/Slutrapport_f%C3%B6r_vallekoraps__2_.pdf

Kvantifiering av mineralvittringens bidrag till grödornas kaliumförsörjning på olika typer av jordbruksmark
Provedor de dados: Organic Eprints
Den fortlöpande leveransen av växtnäringsämnen, genom vittring av markens mineral, är av största betydelse för att ekologiska och övriga odlingssystem med sparsam användning av gödselmedel ska kunna bli uthålliga. För att undvika förluster av närsalter i mer intensiva odlingssystem är det även viktigt att joner tillförda genom gödsling balanseras mot de mängder som frigörs genom vittring, så att proportionerna mellan de totalt tillförda mängderna av olika ämnen överensstämmer med grödornas behov. På grund av tillgången till kommersiella gödselmedel har forskningen kring markmineralens förmåga att levera växtnäring genom vittring länge varit eftersatt. I och med att vi nu ser ett ökat intresse för ett jordbruk med en minskad användning av insatsmedel är den...
Tipo: Project description
Palavras-chave: Nutrient turnover.
Ano: 2023

Site adjusted organic matter balance method for use in arable farming systems
Provedor de dados: Organic Eprints
Autores: Kolbe, Dr. Hartmut.
Common humus balance methods give distinct inexact results and do not meet nowadays requirements in Germany. Outgoing from the method of KOERSCHENS et al. (2004) an improved, site adjusted, semi-quantitative method was developed for manual use in agricultural practice and consultation. In the validation and optimization process over 300 variants from 39 long-term field trials were used, which represent the most important site conditions of Central Europe (Germany). The optimization work was done in four steps.    Identification of site specific groups with homogenous humification levels. Distinct different humification characteristics were recognized for the organic matter of different German site conditions (soil, climate). Six site specific groups could...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil; Crop husbandry; Composting and manuring.
Ano: 2007
URL: http://orgprints.org/10982/1/Prag_Humus1%2D07.pdf

Nährstoffeinträge in der Freilandhaltung von Legehennen - Eignung von Kies im Nahbereich
Provedor de dados: Organic Eprints
Autores: Deerberg, Frauke; Jalane, Verena; Deerberg, Friedhelm; Heß, Jürgen.
Der stallnahe Bereich wird in Grünausläufen von Legehennen besonders stark beansprucht. Durch den vollständigen Verlust der Grasnarbe sind hier häufig Erosion, Verschlämmung und Pfützenbildung zu beobachten. Zur Verringerung von Infektionsrisiken durch Erreger und der Anzahl von Schmutzeiern wird der Stallrandbereich, nach gängiger Empfehlung, oft mit Kies befestigt. Durch die starke Nutzung des Bereiches kommt es dort zu hohen Stickstoffeinträgen, die sich durch fortlaufenden Eintrag bei fehlendem Entzug akkumulieren und im Falle des NO3-N auswaschungsgefährdet sind. Ziel der Untersuchung war es daher zu testen, inwiefern sich Kies unter dem Aspekt des Nährstoffeintrages als Substrat im Nahbereich von Legehennenausläufen eignet. Geprüft wurden die...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Poultry; Health and welfare; Air and water emissions.
Ano: 2019
URL: http://orgprints.org/36126/1/Beitrag_198_final_a.pdf

Phosphorus in Finnish soils in the 1900s with particular reference to the acid ammonium acetate soil test
Provedor de dados: Organic Eprints
Autores: Saarela, Into.
Comprehensive research into phosphorus (P) in soils and crops began in Finland in the early 1900s. The average amount of total P in the ploughed topsoil layer of mineral soils was about two tonnes per hectare in the 1930s, before the abundant use of fertilisers. The main chemical fractions of P in mineral soils were organic matter, primary apatite and secondary complexes of the hydrous oxides of Al and Fe. Of the smaller amounts of P in light peat soils, as much as 80% was present in stable organic compounds. Field experiments showed that the native P reserves of Finnish soils are poorly available to plants, and that P fertilisers are inefficiently utilised because of the strong fixation of applied phosphate in soils. In evaluations before the late 1950s,...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/17094/1/saarela.pdf

Landwirtschaftsbürtige Stickstoff- und Phosphor-Überschüsse - Nährstoffbilanzen der Landkreise Nordrhein-Westfalens.
Provedor de dados: Organic Eprints
Autores: Haas, Guido; Bach, Martin; Zerger, Corinna.
Nordrhein-Westfalen (NRW) weist eine vielfältige naturräumliche Ausstattung und regionalräumlich unterschiedliche Agrarstruktur auf. In den Mittelgebirgen im Süden, im Rheinland bis zum Niederrhein und im Münsterland haben die landwirtschaftlichen Betriebe in den letzten Jahrzehnten verschiedene Wege der Intensivierung und Spezialisierung verfolgt. Die aktuellen Flächenbilanzsalden für Stickstoff und Phosphor spiegeln die Auswirkungen vorherrschender Produktionsstrukturen in den Regionen wieder. Ziel dieses Beitrages ist die flächendeckende Darstellung der Flächenbilanzsalden für Stickstoff und Phosphor in den Landkreisen NRWs.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2005
URL: http://orgprints.org/13926/1/LOEBF_NP_BilanzNRW05.pdf

Tilførslen af organisk stof og jordens aktuelle udbyttepotentiale
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Hansen, E.M.; Christensen, B.T.
Græsmarker øger jordens frugtbarhed. Det kommer til udtryk som mindre N-behov og øget udbyttepotentiale i efterfølgende afgrøder.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/5477/1/5477.doc

Der kurzfristige Einfluss von drei Zwischenfruchtarten und zwei verschiedenen Bodenbearbeitungen auf Frühjahrs-NO3-N des Bodens und Ertrag der Hauptfrucht Hafer
Provedor de dados: Organic Eprints
Autores: Grosse, Meike; Heß, Jürgen.
Reduced tillage and green manures may be capable to further improve organic crop production systems. However, it is presumed that under organic farming conditions a lower intensity of soil tillage may reduce nitrogen (N) availability and increase weed pressure. A combination of reduced tillage with an appropriate green manure species could answer these problems.  The results of a repeated one year trial on the research farm of University of Kassel, regarding the effects of three different green manure species (Sinapis alba, Trifolium resupinatum and Vicia sativa) and conventional (plough) vs. reduced tillage (2012 chisel, 2013 disc harrow) on N availability in spring and on the yield of main crop oat are the topic of this paper.  In both years, in the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil tillage.
Ano: 2015
URL: http://orgprints.org/27130/1/27130_grosse.pdf

Variations in the natural abundance of 15N in ryegrass/white clover shoot material as influenced by cattle grazing.
Provedor de dados: Organic Eprints
Autores: Eriksen, Jørgen; Høgh-Jensen, Henning.
Biological N2 fixation in clover is an important source of N in low external-N input farming systems. Using the natural 15N-abundance method, variations in N2 fixation were investigated in grazed and mowed plots of a ryegrass/white clover field. Ryegrass 15N varied considerably, from 0.2 to 5.6‰ under mowed conditions and from -3.3 to 11.6‰ under grazed conditions. Variations in 15N in white clover were lower than in ryegrass, especially in the mowed plots (SE = 0.05‰, n = 20). The variations in the percentage of nitrogen derived from the atmosphere (%Ndfa) in white clover were highest in the grazed plots where it ranged from 12 to 96% (mean = 64%) compared with the mowed plots where it ranged from 64 to 92% (mean = 79%). Thus, the N2 fixation per unit...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 1998
URL: http://orgprints.org/139/1/PLSO7762.doc

N fertilizer value of legume-based catch crops
Provedor de dados: Organic Eprints
Autores: De Notaris, Chiara; Sørensen, Peter; Rasmussen, Jim; Olesen, Jørgen E.
N availability is one of the main factors limiting productivity in organic arable systems. Legume-based catch crops (CC) were shown to both increase N yield and reduce N leaching at the crop rotation scale, but strategies to stabilize their growth are required (De Notaris et al., 2018). The present study showed that early CC sowing time and an increased main crop row space can help stabilize CC growth and increase N accumulation, especially when the conditions for the CC are not favorable. Despite the variations in N accumulated in CC biomass, legume-based catch crops represent a valuable source of N for the subsequent crop, with their fertilizer value being less variable than the N accumulated in CC biomass.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Denmark; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/33053/1/De%20Notaris_N%20workshop%20abstract.doc

Below ground nitrogen dynamics in the sequence clover-grass maize in the DOK long term experiment
Provedor de dados: Organic Eprints
Autores: Mayer, Jochen; Oberson, Astrid; Lüscher, Andreas; Frossard, Emmanuel; Hammelehle, Andreas.
We investigated the effect of organic versus conventional cropping systems on the below ground nitrogen inputs of Trifolium pratense L., its transfer to corresponding grass and the fate in the soil organic matter in the clover-grass ley of the DOK long term experiment, Switzerland. BGN tended to be largest in conventional and organic treatments with standard fertilisation and decreased with lower fertilisation intensity. The largest amount of clover N transferred to grass was observed in the minerally fertilised conventional treatment. Clover N derived from rhizodeposition was rapidly stabilised in all treatments to clay rich fractions and thus clover N will have a relatively low direct N contribution to subsequent nonlegumes.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/24030/1/24030_MM.pdf

Understanding soil fertility in organically farmed systems (OF0164)
Provedor de dados: Organic Eprints
Autores: Shepherd, Dr M. A.
This is the final report of the Defra project OF0164.  Organic farming aims to create an economically and environmentally sustainable agriculture, with the emphasis placed on self-sustaining biological systems rather than external inputs. Building soil fertility is central to this ethos. ‘Soil fertility’ can be considered as a measure of the soil’s ability to sustain satisfactory crop growth, both in the short- and longer-term. It is determined by a set of interactions between the soil’s physical environment, chemical environment and biological activity. The aim of this project was, therefore, to provide a better scientific understanding of soil fertility under organic farming.  The approach was to undertake a comprehensive literature review at the start...
Tipo: Report
Palavras-chave: Nutrient turnover; Farming Systems; Soil biology; Technology transfer.
Ano: 2002
URL: http://orgprints.org/8108/1/OF0164_2148_FRP.pdf

Übersicht über Versuche und Entwicklungsarbeiten zur Düngung im Ökologischen Landbau in Deutschland [Chart of trials and projects on fertilization and manuring  in organic agriculture in Germany]
Provedor de dados: Organic Eprints
Autores: Kolbe, Hartmut.
Tabelle mit Versuchen und Projekten von Mitgliedern der Arbeitsgruppe Versuchsansteller im ökologischen Landbau im Verband der Landwirtschaftskammern e.V. (VLK).    Tabellenrubriken:  Land, Institution, Versuchsansteller  Themenstellung   Versuchs- u. Entwicklungsmethodik: Versuchsart, Versuchsort, Bodenart, Anlagetyp, Wiederholungen, Laufzeit  Faktoren: Düngung  zusätzl. Faktoren, Kulturart, Vorfrucht Fruchtfolge  Untersuchungsschwerpunkte: Boden, Luft, Umwelt  Untersuchungsschwerpunkte: Pflanze  Veröffentlichungen
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover; Crop husbandry.
Ano: 2001
URL: http://orgprints.org/800/1/800%2Dkolbe%2Dh%2D2001%2Dduengung.pdf

Roots below one meters depth are important for nitrate uptake by annual crops
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
The root depths of annual crops vary from 0.2 m to more than 2 m depending on root growth rate and length of growing season. However, studies of root growth and N uptake are often restricted to a depth of 1 m or less, as root biomass is assumed to be negligible below this depth. We have studied the importance of root growth and N uptake to a depth of 2.5 m in fully grown field vegetables and cover crops by use of minirhizotrons and deep point placement of 15N. Deep rooted crucifereous crops were found to have high root densities to a depth of 1.5-2 m and high 15N uptake to this depth. Uptake was significant near the bottom of the root zone at a depth of 2-2.5 m where root density was low. Here N uptake rates were higher per unit root length compared to...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Vegetables.
Ano: 2006
URL: http://orgprints.org/11462/1/Deep_roots_HLK_FINAL.ppt

Tillage-induced N mineralization and N uptake in winter wheat on a coarse sandy loam
Provedor de dados: Organic Eprints
Autores: Thomsen, I.K.; Sørensen, P.
The potential of adjusting soil N mineralization by soil tillage in the growing season was investigated in winter wheat on a coarse sandy loam. In two succeeding years, wheat was sown at 25 cm row spacing on plots where four different organic matter (OM) management strategies regarding pig slurry application, straw incorporation and catch crop growing had been applied for the previous 13 years. Soil tillage was carried out in spring with a row cultivator, a PTO-driven row rotovator or a brushweeder. Soil inorganic N content was determined in tilled and undisturbed soil during four weeks after tillage. In the first experimental year, gross nitrogen transformation rates were measured by 15N pool dilution techniques in row rotovated soil and in undisturbed...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2006
URL: http://orgprints.org/4578/1/4578.doc

Zügiger Umsatz bei vielen der im Brutversuch getesteten  organischen Handelsdünger
Provedor de dados: Organic Eprints
Autores: Laber, Hermann.
Am Sächsischen Landesamt für Umwelt, Landwirtschaft und Geologie (LfULG) in Dresden-Pillnitz wurde im Winter 2012/2013 ein Brutversuch mit verschiedenen organischen Handelsdüngern pflanzlicher und tierischer Herkunft durchgeführt. Die Bebrütung mit Oberbodenmaterial eines stark lehmigen Sandes wurde bei 15°C über 11 Wochen durchgeführt.  Die Netto-N-Mineralisation der Düngemittel lief zumeist ‘zügig‘ an, so dass nach 14 Tagen bereits rund 25 bis 45 % der gedüngten N-Menge mineralisiert waren. Lediglich ein Dünger auf Schafwollbasis sowie sehr grobe Hornspäne zeigten zunächst einen langsameren Mineralisationsverlauf.  Der zeitliche Verlauf der Mineralisation konnte, mit Ausnahme des Schafwolldüngers und der Hornspäne, sehr gut mit einer ‘monomolekularen‘...
Tipo: Working paper
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2013
URL: http://orgprints.org/22436/1/Brutversuch%202013.pdf

Olieræddike kan optage tabt nitrat fra 2,5 meters dybde
Provedor de dados: Organic Eprints
Autores: Kristensen, H.L.; Thorup-Kristensen, K.
Nye forsøg viser at olieræddike har meget dybe rødder og kan opsamle nitrat fra 2,5 meters dybde. Hvis dybtrodede efterafgrøder placeres strategisk i sædskiftet, har man især på bedre jorder mulighed for at hente væsentlige mængder nitrat fra dybere jordlag.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Soil biology; Farm nutrient management; Air and water emissions.
Ano: 2003
URL: http://orgprints.org/7922/1/7922.pdf

Turnover of organic matter in differently textured soils: II. Microbial activity as influenced by soil water regimes
Provedor de dados: Organic Eprints
Autores: Thomsen, I.K.; Schjønning, P.; Jensen, B.; Kristensen, K.; Christensen, B.T.
To evaluate the effect of soil texture and soil water content on decomposition of organic carbon (OC), turnover of partially stabilized 14C-labelled ryegrass residues was studied at four matric potentials in twelve differently textured soils of similar origin and cropping history. Six soils were from a naturally occurring clay gradient and had 11, 16, 21, 31, 37 and 45% clay (termed NA1 to NA6). Three clay-amended soils (CL2, CL4, CL6) and three silt-amended soils (SI2, SI4, SI6) were prepared by adding clay or silt sized organomineral complexes extracted from the NA2 soil to a portion of the NA1 soil. After 14C-labelled ryegrass had decomposed for eight months under field-like conditions, soil cores were sampled, adjusted to four matric potentials (-30,...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality; Soil biology.
Ano: 1999
URL: http://orgprints.org/727/1/geoderma_99_II.pdf

Højværdiafgrøder løser problemer
Provedor de dados: Organic Eprints
Autores: Sørensen, K L.
Flerårige højværdiafgrøder skal levere højkvalitetsprotein og biomasse til energi og samtidig håndtere udfasning af konventionel husdyrgødning, løse ukrudtsproblemer og løfte biodiversiteten i det økologiske planteavlssædskifte.
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/35225/1/artikel_oekologi_erhverv_2015%20%281%29.pdf

Resultater med efterafgrøder i økologiske forsøg – hvordan kan disse resultater udnyttes på økologiske og konventionelle bedrifter
Provedor de dados: Organic Eprints
Autores: Askegaard, Margrethe; Rasmussen, Ilse A.; Olesen, Jørgen E.
Efterafgrøder kan reducere udvaskningen af næringsstoffer og derved virke positivt på både miljø og udbytte i en efterfølgende afgrøde. Men efterafgrøder skal anvendes med omtanke. Valget af efterafgrøde og hyppigheden hvormed de anvendes i et givent sædskifte bør tilpassses jordtype, gødningsniveau og sædskiftets afgrøder.     Det langvarige økologiske sædskifteforsøg giver mulighed for at sammenligne effekten af efterafgrøder på forskellige jordtyper. Den procentvise reduktion af N-udvaskningen og den udbyttemæssige effekt på efterfølgende afgrøder faldt med stigende lerindhold i jorden.     På Foulum var der i starten af sædskifteforsøget mere ukrudt i sædskifterne med efterafgrøder end uden efterafgrøde hvor der kunne strigles i afgrøderne, men brug af...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/3331/1/3331.doc

Afgræsningsmarkers eftervirkning
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
I nitratfølsomme vandindvindingsområder med landbrugsproduktion tilrådes af forsigtighedshensyn en grænseværdi på 50 mg nitrat pr. liter i nedsivningsvandet. Til trods for et lavere udvaskningspotentiale i økologisk end i konventionelt jordbrug, så har økologisk jordbrug ikke altid nitratkoncentrationer under grænseværdien – det gælder især på kvægbrugene. Årsagen er, at intensive afgræsningssystemer forøger tabsrisikoen pga. at drøvtyggere udskiller 75-95% af deres N-indtag i gødningen, og hovedparten af dette bliver afsat i marken under afgræsning. På den måde sker der en betydelig opbygning af N i afgræsningsmarker, og ved ompløjning frigives derfor hyppigt N i et omfang, som den efterfølgende afgrøde ikke er i stand til at udnytte med nitratudvaskning...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/1410/1/Klumme.doc

Green manuring for tropical organic cropping – A comparative analysis
Provedor de dados: Organic Eprints
Autores: Sangakkara, Dr. Ravi; Weerasekera, Mr. Danesh; Freyer, Prof.Dr. Bernhard.
Green manuring is an essential component of tropical organic farming. Field studies evaluated the use of three legumes as in situ or ex situ green manures, along with a nonlegume green manure and a control to ascertain their impacts on soil properties and yields of maize and mung bean grown in major (wet) and minor (dry) seasons.  In situ green manuring, especially with legumes, had the most beneficial impact on soil properties, while with ex situ methods, the use of leaves alone improved soil properties. Yields were increased to a greater extent by green manuring in the minor season, and the in situ system proved to be more beneficial. In ex situ green manuring, greater benefits were obtained by the application of leaves alone.  The impact of different...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2008
URL: http://orgprints.org/12524/1/12524.pdf

Planty Organic 5 year: evaluation of soil fertility, nitrogen dynamics and production.
Provedor de dados: Organic Eprints
Autores: Burgt, Geert-Jan H.M.; Rietema, Carina; Bus, Michiel.
In the Planty Organic experimental field, located at the SPNA location ‘Kollumerwaard’, an organic arable farming system is developed based on three principles:  • Nitrogen input fully based on leguminous crops  • Use of farm-produced cut-and-carry fertilizers  • Reduced tillage; no ploughing.  The results of this research will be available for improvements in both organic and conventional arable farming. The experimental site consists of six plots, 0,8 hectare each. There is a six-year rotation, which means that each crop is present each year in a different plot.. The project started in 2011. Since 2012 year-reports have been published. For this evaluation of the system results the start-up year has been left out and the data of 2012 – 2016 are used for...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/32529/1/2018-004%20LbP%20Planty%20Organic%20Evaluation_def.pdf

N-fiksering - hvor meget og hvordan?
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
Bælgplanter, herunder de forskellige kløverarter, kan ved knoldbakteriers hjælp bruge luftens kvælstof, og derved udnytte denne uudtømmelige kvælstofkilde. Denne biologiske proces er en forudsætning for at kunne drive økologisk jordbrug, og det har derfor stor interesse at kende størrelsen af N-fikseringen og have kendskab til hvilke faktorer der har betydning, for derved om muligt at kunne optimere produktiviteten og reducere eventuelle miljømæssige effekter af et givet dyrkningssystem.    En lang række undersøgelser har vist, at der er en forholdsvis konstant relation mellem høstet kløvertørstof og N-fiksering. I kløvergræs udgør N-fikseringen således 30-35 kg N per tons høstet kløvertørstof. Dvs. at hvis der i en kløvergræs i løbet af vækstsæsonen er...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Pasture and forage crops.
Ano: 2004
URL: http://orgprints.org/4160/1/4160.ppt

Soil chemical properties under different nutrient managements in Estonia
Provedor de dados: Organic Eprints
Autores: Sanches De Cima, Diego; Reintam, Endla; Eremeev, Viacheslav; Luik, Anne.
A five years research run at the experimental station of the Estonian University of Life Sciences in Eerika, Tartu, Estonia since 2008 on Albic Stagnic Luvisol soil, compared the evolution of different elements (Corg, N, P, K) in soil with time, on the basis of conventional and organic farming. For this aim, 80 plots under the same crop rotation (pea, potato, barley, red clover and winter wheat) were divided as follows: 40 cultivated under conventional farming system with different concentrations of mineral fertilizers (20 without addition of chemical fertilizers: N0P0K0; and 20 with a final concentration equals to N125P25K95) and the remaining 40 plots cultivated under organic farming conditions with winter oil-rape after pea, winter rye after potato and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover; Soil.
Ano: 2013
URL: http://orgprints.org/26838/1/Down%20to%20Earth%202013%20Abstract.pdf

Simulating Soil Organic Matter Transformations with the New Implementation of the Daisy Model
Provedor de dados: Organic Eprints
Autores: Petersen, Anders; Bruun, Sander; Jensen, Dr. Lars Stoumann; Hansen, Dr. Søren.
Daisy is a well-tested deterministic, dynamic soil-plant-atmosphere model, capable of simulating water balance, nitrogen balance and losses, development in soil organic matter and crop growth and production in crop rotations under alternate management strategies. Originally it was developed as a system of single models describing each process involved, but recently it has been developed into a framework, which can be used for implementation of several different models of each of the different processes. Thus, for example a number of different models for simulating soil water dynamics can be chosen depending on the purpose of the simulation and the availability of data for parameterisation.   The sub-model simulating soil organic matter is still a fixed...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Production systems; Crop combinations and interactions; Soil biology.
Ano: 2001
URL: http://orgprints.org/1699/1/DAISY_Poster_Reims.pdf

Intervalo hídrico ótimo como indicador de melhoria da qualidade estrutural de latossolo degradado.
Provedor de dados: Organic Eprints
Autores: LIMA, Vico Mendes Pereira; OLIVEIRA, Geraldo César de; SERAFIM, Milson Evaldo; CURI, Nilton; EVANGELISTA, Antônio Ricardo.
As pastagens de gramíneas, quando bem formadas e manejadas, representam um componente ambiental importante em razão do papel que exercem na cobertura dos solos, na formação e estabilização dos agregados e na redução do  adensamento ou da compactação. Os objetivos deste estudo foram quantificar o intervalo hídrico ótimo (IHO), para um Latossolo Vermelho-Amarelo degradado fisicamente e cultivado com Coastcross (Cynodon spp.), e utilizar o IHO como indicador de alteração da estrutura desse solo. Amostras indeformadas foram coletadas em anéis volumétricos de 0,025 m de altura e 0,065 m de diâmetro, nas profundidades de 0–0,05 e 0,20–0,25 m e no horizonte Bw (0,80–0,85 m), na ausência de tráfego de máquinas agrícolas, durante a estação chuvosa de 2008/2009,...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil.
Ano: 2012
URL: http://orgprints.org/29846/1/Lima_Intervalo.pdf

The effect of catch crops on sulphate leaching and availability of S in the succeeding crop
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Thorup-Kristensen, K.
Sulphate leaching losses may reduce the long-term possibility of maintaining the S supply of crops in low input farming systems. The ability of catch crops (Italian ryegrass [Lolium multiflorum Lam], winter rape [Brassica napus L.] and fodder radish [Raphanus sativus L.]) to reduce soil sulphate concentrations in autumn and make it available to a succeeding crop was investigated in a field experiment on sandy loam soil. All catch crops reduced soil sulphate concentrations in the autumn compared to bare soil. Especially the cruciferous catch crops had the ability to deplete efficiently soil sulphate levels and thus, reduce the sulphate leaching potential. The S uptake in aboveground catch crop was 8, 22 and 36 kg S ha-1 for ryegrass, winter rape and fodder...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/235/1/nyEriksen.doc

Jaar van de Bodem blijft inspireren: ook bedrijfsleven zet zich in voor verantwoord bodembeheer
Provedor de dados: Organic Eprints
Autores: Janmaat, Leen.
Half juni organiseerde Mulder Agro de Bodem Beleefdagen, inclusief een beurs en 23 workshops. Bezoekers werden via een bodemsleuf naar binnen geleid. Tijdens de Biologische Velddag op de professor Broekemahoeve was ook veel aandacht voor de bodem en specifiek voor de relatie met fosfaat. En Helphumus daagt boeren uit zich via de website www.helphumus.nu te profileren met bodemverhalen.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Soil.
Ano: 2015
URL: http://orgprints.org/29875/1/3086.pdf

Organische Handelsdünger für den ökologischen Gemüsebau
Provedor de dados: Organic Eprints
Autores: Laber, H.
Dem ökologischen Gemüsebau stehen eine Vielzahl von organischen Handelsdüngern zur Verfügung. Neben Hornspänen, -gries und -mehl sowie den Mischdüngern tierischen Ursprungs war Rizinusschrot das erste Produkt pflanzlicher Herkunft. Hinzu kamen Feder-, Haar-, Blut- und Fleischmehle sowie weitere Extraktionsschrote (Raps, Sonnen-blumen etc.) als auch Rückstände aus der Malz-, Zuckerrüben- und Maisverarbeitung (Tabelle). Zur Erleichterung der Ausbringung sind einige dieser Düngemittel pelletiert, wobei häufig Vinasse als Bindemittel eingesetzt wird. Allen gemein ist ihre Herkunft aus dem konventionellen Landbau, was dem Kreislaufgedanken des ökologischen Anbaus widerspricht. Als Alternative kamen Körnerleguminosen ins Gespräch, die, in Öko-Betrieben...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover; Vegetables.
Ano: 2001
URL: http://orgprints.org/1956/1/1956%2Dlaber%2Dh%2D2001%2Dhandelsduenger.pdf

Thirty years of growing cereal without P and K fertilization
Provedor de dados: Organic Eprints
Autores: Jaakkola, Antti; Yli-Halla, Markku.
Over thirty years a significant depletion of P and K in soil occured when the were not given in fertilizers. This caused a reduction in crop yield. An abundant P application exceeding the crop uptake very clearly prevented the yield reduction but did not raise the extractable P concentration in the soil. Severe K deficiency did not start to appear until 20 years of growing cereal without fertilizer K. K application compensating for the uptake by the crop did not prevent the decrease of its extractable concentration in this soil, but this decrease did not affect crop yield.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/15806/1/longterm.pdf

Deposition of C and N in the soil from legume-based cover crops – quantification and mineralization.
Provedor de dados: Organic Eprints
Autores: De Notaris, Chiara; Rasmussen, Jim; Sørensen, Peter; Olesen, Jørgen E.
Legume-based cover crops (CC) provide a wide range of ecosystem services, including nitrate leaching reduction, N fertilizer and soil C sequestration effects. However, the scarcity of information on belowground C and N increases the uncertainty on the magnitude of these effects. With the present study, we quantified soil C and N deposition from legume-based CC (two pure legumes and two mixtures) grown under field conditions, in Denmark. To do so, we labeled CC plants with 13C (CO2) and 15N (leaf-labeling) throughout their growing period, by following a frequent multiple-pulse labeling scheme. Then, we incubated labeled CC roots and soil to investigate C and N mineralization. Cover crops with red clover produced about 2.7 Mg ha-1 aboveground biomass, and...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2019
URL: http://orgprints.org/35017/1/CC%20lab_all_20190314.docx

Repeated use of green-manure catch crops in organic cereal  production - grain yields and nitrogen supply
Provedor de dados: Organic Eprints
Autores: Løes, Anne-Kristin; Henriksen, Trond Maukon; Eltun, Ragnar; Sjursen, Helge.
By restricted access to manure, nitrogen (N) supply in organic agriculture relies on biological N-fixation. This study compares grain yields after one full-season green manure (FSGM) to yields with repeated use of a green-manure catch crop. At two sites in south-eastern Norway, in a simple 4-year rotation (oats/wheat/oats/wheat), the repeated use of ryegrass, clover, or a mixture of ryegrass and clover as catch crops was compared with an FSGM established as a catch crop in year 1. The FSGM treatments had no subsequent catch crops. In year 5, the final residual effects were measured in barley.    The yield levels were about equal for grains with no catch crop and a ryegrass catch crop. On average, the green-manure catch crops increased subsequent cereal...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/18531/1/Final_version_March_2011_Repeated_use_of_green_manure_catch_crops.pdf

Combined Application of Oil Cake and Rice Bran  Reduced the Number of Weeds and Increased  the Yield of Paddy Rice in a Pad Field    Incorporated with White Clover
Provedor de dados: Organic Eprints
Autores: Sugimoto, Hideki; Takuya, Araki; Masahiro, Morokuma; Hossain, Shaikh Tanveer.
The combined application of oil cake and rice bran into the soil surface was found useful for weed control in our previous pot study. The present study was undertaken to evaluate the performance of white clover (Trifolium repens L.) while incorporated in the paddy field and effects of combined fertilizer on weed control and rice yield.  A plot was divided into two parts i.e. white clover incorporated and not incorporated. The nitrogen content of the incorporated white clover was 12.5 gm-2. Chemical fertilizer and combined fertilizer plots were compared with non-fertilizer conditions. The mixed ratio of combined fertilizer was oil cake 1.35 and rice bran 1.0. Combined fertilizer was applied to the soil surface, and chemical fertilizer was mixed in the soil....
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Weed management; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/32102/1/9th%20ACSA%202017%20Abstract%202.pdf

Potential uses for bracken (Pteridium aquilinum (L.) Kuhn) in organic agrculture
Provedor de dados: Organic Eprints
Autores: Donnelly, E; Robertson, J; Robinson, D.
Bracken is a weed species due to its toxic nature and adverse effects on agriculture and ecology. This poster reviews research into historical uses for fronds and litter harvested as part of organically approved control methods. The use of bracken as an over winter mulch reduced losses of nitrogen and potassium from bare soil and maintained soil temperatures. Bracken litter was found to be a viable biofuel, with a calorific value comparable to wood and low ash and alkali metal contents. The contents of frond ash were investigated, with high concentrations of potassium found giving them a value as organic fertiliser. The addition of frond ash to soil significantly increased clover growth and number of nodules. The addition of frond ash to soil significantly...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Root crops; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/10254/1/Potential_uses_for_braken_(Pteridium_aquilinum_(L.)_Kuhn)_in_organic_agriculture.pdf

Impact of Organic farming on aquatic environment
Provedor de dados: Organic Eprints
Autores: Kristensen, Erik Steen; Knudsen, Marie Trydemann.
The effects of conversion to organic farming on N leaching are discussed in the presentation. Problems in European aquatic environment are presented along with the development of organic farming in Denmark and the rest of Europe. Recent Danish studies on the N leaching effects by conversion of mixed dairy and arable farms are presented. The studies estimate that N leaching is lower from organic compared to conventional mixed dairy farms, whereas N leaching at organic arable farms are comparable to conventional arable farms.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/3996/1/ESK_Env_Tjekkiet_juli_04.pdf

Arbuskuläre Mykorrhizapilze als Bioindikatoren  in Schweizer Landwirtschaftsböden
Provedor de dados: Organic Eprints
Autores: Oehl, Fritz; Jansa, Jan; Ineichen, Kurt; Mäder, Paul; van der Heijden, Marcel.
Die meisten Nutz- und Wildpflanzen bilden eine Symbiose mit einer speziellen Gruppe von Bodenpilzen, den Arbuskulären Mykorrhizapilzen (AM-Pilze). AM-Pilze übernehmen in allen von Pflanzen besiedelten Ökosystemen wichtige Funktionen. Sie bilden ein engmaschiges Pilzfadengeflecht im Boden und geben lebensnotwendige Nährstoffe aus dem Boden an die Pflanzen weiter und schützen diese gegen Stress und Trockenheit.  Sie reduzieren Nährstoffverluste aus dem Boden und können durch Lebendverbauung Erosion vermindern und somit die Stabilität on Ökosystemen erhöhen. AM-Pilze scheinen als Bioindikatoren besonders geeignet zu sein, da diese Pilzgruppe mit bisher bekannten 230 Arten überschaubar klein ist und sowohl häufige als auch seltene Arten enthält. In der Schweiz...
Tipo: Newspaper or magazine article
Palavras-chave: Indicators and other value-laden measures; Nutrient turnover.
Ano: 2011
URL: http://orgprints.org/21813/1/oehl-etal-2011-agrarforschungSchweiz-2-0708-p304-311.pdf

Determining deep root activity in arable fields by the core-labelling technique (CLT)
Provedor de dados: Organic Eprints
Autores: Han, Eusun; Dresbøll, Dorte Bodin; Thorup-Kristensen, Kristian.
Introduction: Deep roots have the potential to exploit plant resources otherwise inaccessible. The aim of this study was to develop a method, the Core-Labelling Technique (CLT), to measure root activity down to 2.5 m of soil depth under field conditions.     Materials and Methods: Two stainless steel ingrowth-cores, 0.1 m in diameter and 0.55 m in length, were filled with soil labelled with nutrient tracers, i.e., LiCO3, CsCO3, Na2SeO4, RbCO3 and 15NH4Cl. The labelled cores were placed into an access-tube having openings at 1.0 m and 2.5 m of soil depth. They were kept under a lucerne (Medicago sativa) crop for 60 days, after which, the root length density (RLD) and concentration of tracers in shoot biomass (including a control) were measured.    Results:...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover; Soil tillage; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/33942/1/Poster%20-%20Eusun_final.pdf

BioWad Newsletter PlantyOrganic November 2014
Provedor de dados: Organic Eprints
Autores: Bus, Michiel; Hospers-Brands, A.J.T.M.
Planty Organic is a study into a new and innovative agricultural system in general and the nitrogen cycle in particular. The study started in 2012 and is carried out at the Kollummerwaard model farm in Munnukezijl (on the boundary of Groningen/Friesland). More information about this interesting study can be found at the website www.biowad.nl.    In this Newsletter:        Looking back on the 2013-2014 season      Status of the trial field      Danes visit our trial field      Wageningen University students write thesis      Article in Akker
Tipo: Other
Palavras-chave: Farming Systems; Nutrient turnover; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/28296/1/2970.pdf

ReSolVe: come ripristinare  la funzionalità ottimale dei suoli
Provedor de dados: Organic Eprints
Autores: Costantini, E.A.C.; Priori, S.
Nell’ambito del progetto vengono testati gli effetti di alcune strategie agronomiche e interventi sito-specifici per il ripristino della funzionalità del suolo all’interno  di un vigneto condotto in biologico
Tipo: Newspaper or magazine article
Palavras-chave: Soil quality; Soil biology; Composting and manuring; Nutrient turnover; Biodiversity and ecosystem services; Landscape and recreation.
Ano: 2016
URL: http://orgprints.org/30491/1/p_20_21_speciale%20ReSolVe.pdf

Phosphorus bioavailability of sewage sludge-based recycled fertilizers
Provedor de dados: Organic Eprints
Autores: Wollmann, Iris; Gauro, Ajay; Müller, Torsten; Möller, Kurt.
Six phosphorus (P) fertilizers recycled from sewage sludge [Struvite SSL, Struvite AirPrex,P-RoC, Mephrec, Pyrolysis coal and Ash (Mg-SSA)] were tested for their plant availability in potted soil of pH 7.2 under greenhouse conditions. The crop sequence simulated a rotation of red clover (Trifolium pratense L.), maize (Zea maize L.), and ryegrass (Lolium perenne L.). Other P fertilizer treatments included: Phosphate Rock (PR), Calcium dihydrogen phosphate [Ca(H2PO4)2], and an unfertilized control. Additionally, soil was regularly inoculated with two strains of plant growth-promoting rhizobacteria (PGPR; Pseudomonas sp. Proradix, and Bacillus amyloliquefaciens) to test their ability to increase P availability to plants. Sequential P  fractionation was...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/32921/1/Wollmann2017-Phosphorus%20bioavailability%20of%20sewage%20sludge-based%20recycled%20fertilizers.pdf

YouTube Video: Improve-P: Re-Use the phosphorus! - Workshop in Istanbul (Oct 2014)
Provedor de dados: Organic Eprints
Autores: Alföldi, Thomas.
At a workshop during the 18th Organic World Congress, Istanbul October 2014, researchers from the Improve-P project discussed recycling of phosphorus (P) in organic agriculture with stakeholders from several European countries. How can we increase the use of recycled P without compromising a premium product quality? What is a long-term sustainability of organic farming? Options to treat and use permitted as well as currently non-allowed P fertilizers from urban areas were presented. In this video, Improve-P project partner Julia Cooper summarizes the main outcomes of the workshop, and workshop participants express their views on P-recycling.  Statements were kindly given from Christopher Brock, University of Giessen; Louise Payton, Soil Association UK;...
Tipo: Video
Palavras-chave: Composting and manuring; Nutrient turnover; Farm nutrient management; Quality and evaluation of inputs.
Ano: 2014

Efterafgrøder med mange formål
Provedor de dados: Organic Eprints
Autores: Thorup-Kristensen, Kristian.
Short article about the use of catch crops for many purposes in organic farming.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Production systems; Soil biology.
Ano: 2003
URL: http://orgprints.org/551/1/efterafgr_klumme.pdf

Knivtromle i økologisk pløjefri dyrkning
Provedor de dados: Organic Eprints
Autores: Tersbøl, Michael.
Efterafgrøden dør uden at blive hakket over, og det er vigtigt i dette koncept. Behandlingen skal ske, efter efterafgrøden er i blomst eller kornet gennemskredet.
Tipo: Web product
Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover; Soil tillage; Air and water emissions; Vegetables; Biodiversity and ecosystem services; Weed management.
Ano: 2017
URL: http://orgprints.org/32031/1/fagligt-talt-oekologi-erhverv-nr-610

Evaluation of the NDICEA model
Provedor de dados: Organic Eprints
Autores: Burgt, Geert-Jan H.M.; Rietberg, P.I.
Within the N-Toolbox project the NDICEA nitrogen model, one of the key tools in the virtual Toolbox, has been improved and tested in England, Denmark and Spain. The model performance was evaluated on datasets from these three countries by means of visual observation, RMSE and RSR from the soil nitrogen dynamics. In England the scenarios with organic fertilizer performed better than those with artificial fertilizer, leading to the suggestion that the calculated nitrogen release out of fertilizer could be improved. Timing of the soil sampling on soil inorganic nitrogen is important to realize a good model evaluation; two samples only, before sowing and after harvest, is not enough. When soil mineral nitrogen samples were taken during crop growth, model...
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2012
URL: http://orgprints.org/22232/1/2694.pdf

Ridging in autumn as an alternative to mouldboard ploughing in a humid-temperate region
Provedor de dados: Organic Eprints
Autores: Henriksen, Christian Bugge; Rasmussen, Jesper; Søgaard, Carsten.
In the original ridge tillage system as practiced in the US Corn Belt, ridges are formed during the growing season. Several studies have documented that this can reduce leaching of nutrients and improve fertilizer efficiency. This study was conducted to determine whether ridges formed in autumn can be used as an alternative to ploughing to reduce N leaching during autumn and winter, and thereby increase growth and N uptake of a subsequent unfertilized crop. A factorial field experiment with tillage and residues as factors was conducted during 1998-2000. Tillage treatments were autumn ridging and ploughing. Residue treatments were stubble, stubble+straw and stubble+liquid manure in order to create a gradient of C/N ratios. From the time of harvest until...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farming Systems; Soil tillage.
Ano: 2005
URL: http://orgprints.org/3952/1/3952.pdf

Simulating root density dynamics and nitrogen uptake in the soil profile – A simple approach
Provedor de dados: Organic Eprints
Autores: Pedersen, Anders; Zhang, Kefeng; Thorup-Kristensen, Kristian; Jensen, Lars S.
We present a 2-D model for simulation of root density and nitrogen (N) uptake for crops grown in agricultural systems, based on a modification of Gerwitz and Page’s root density calculation. A root system form parameter was used to describe the distribution of root biomass vertically and horizontal in the soil profile. The form parameter can vary from 0 where root density is evenly distributed in the soil profile, to 8 where practically all roots are found near the surface. Additionally, the root model has other components describing root features, such as specific root length, N uptake kinetics.   The root penetration rate and the depth distribution of root density were found to be the most important parameters controlling crop N uptake from deeper soil...
Tipo: Working paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Root crops; Farm nutrient management; Vegetables.
Ano: 2007
URL: http://orgprints.org/11361/1/Rodmodel_Artikel_Org_eprint.pdf

Evaluierung LE07-13. Bewertung des viehlosen biologischen Ackerbaus und seiner agrarökologischen Leistungen im österreichischen Trockengebiet (MUBIL III). Zwischenbericht
Provedor de dados: Organic Eprints
Auf einem biologisch bewirtschafteten Marktfruchtbetrieb im Marchfeld in Niederösterreich wird seit dem Jahr 2003 eine umfassende agrarökologische und systemorientierte Langzeituntersuchung zur Dokumentation und Entwicklung des biologischen Landbaus durchgeführt. Im Rahmen eines interdisziplinären Forschungsprojekts (MUBIL) werden die Wirkungen der Umstellung und langfristigen biologischen Bewirtschaftung auf Bodenkennwerte, den Wasserhaushalt, auf die Pflanzengesellschaften, das Ertragspotential der Kulturpflanzen und die Fauna anhand ausgewählter Eigenschaften erfasst. Auf Ackerflächen des Betriebes wurden Nützlings- und Blühstreifen mit unterschiedlichen Blühmischungen angelegt. Bestehende Hecken und Baumreihen am Betrieb wurden kartiert und deren...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover; Crop husbandry; Biodiversity and ecosystem services.
Ano: 2010
URL: http://orgprints.org/18696/1/Freyer_et_al.%2D2010%2DMUBILIII_EVALUATION_Midterm_Report.pdf

Nährstoffmanagement in ökologisch bewirtschafteten Gewächshäusern in Südwest-Deutschland: Bedingt der Anbauverband die Düngestrategie?
Provedor de dados: Organic Eprints
Autores: Zikeli, Sabine; Deil , Lucia; Möller, Kurt.
Ökoloogisch wirtschaftende Gartenbaubetriebe wirtschaften nutzen vor allem im geschützen Anbau oft große Mengen an externen Inputs als Grunddünger (Kompost oder Wirtschaftsdeünder) und Ergänzungsdünger (z.B. organische Handelsdünger wie Federmehle oder Produkte aus der Lebensmittelverarbeitung. Der Einsatz dieser Düngemittel ist über die EU-Ökoverordnung(834/2007 und 889/2008) geregelt. Bisher ist wenige über die Düngestrategien ökologischer Gartenbaubetriebe im Unterglasanbau bekannt, es fehlen beispielsweise Informationen zum Einfluss des Düngemamangements auf Nährstoffbilanzen und den Status an pflanzenverfügbaren Nährstoffen im Boden. Aus diesem Grunde wurden 10 ökologisch wirtschaftende Gartenbau in Südwest-Deutschland (5 Mitglieder von Bioland e.V....
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover; Greenhouses and coverings.
Ano: 2015
URL: http://orgprints.org/27137/1/27137_zikeli.pdf

Response of organically managed grassland to available phosphorus and potassium in the soil and supplementary fertilization: field trials using grass–  clover leys cut for silage
Provedor de dados: Organic Eprints
Autores: Fortune, S; Robinson, J S; Watson, C A; Philipps, L; Conway, J S; Stockdale, E A.
Effective use and recycling of manures together with occasional and judicious use of supplementary fertilizing materials forms the basis for management of phosphorus (P) and potassium (K) within organic farming systems. Replicated field trials were established at three sites across the UK to compare the supply of P and K to grass–clover swards cut for silage from a range of fertilizing materials, and to assess the usefulness of routine soil tests for P and K in organic farming systems. None of the fertilizing materials (farmyard manure, rock phosphate, Kali vinasse, volcanic tuff) significantly increased silage yields, nor was P offtake increased. However, farmyard manure and Kali vinasse proved effective sources of K to grass and clover in the short to...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; "Organics" in general; Soil; Farming Systems; Farm nutrient management.
Ano: 2005
URL: http://orgprints.org/7702/1/ref_paper_LP_Journal_Soil_Use.pdf

Nährstoffeinträge in Entwässerungssysteme norddeutscher Grünlandgebiete: Analyse zur Ableitung von Handlungsempfehlungen (Verbundvorhaben)
Provedor de dados: Organic Eprints
Das hier beschriebene Verbundvorhaben umfasst folgende Teilprojekte: FKZ 17NA003, FKZ 17NA004, FKZ 17NA005, FKZ 17NA006 und FKZ 17NA007.  Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/id/saved_search/1727.   Das im vorliegenden Antrag beschriebene Projekt Waterbuddies zielt darauf ab, eine Verbesserung der Nährstoffbelastung von Oberflächengewässern zu erreichen. Es verfolgt einen transdisziplinären und transformativen Ansatz, welcher die gemeinsame Beteiligung und enge Kooperation verschiedener Akteure und Experten erfordert (sechs Teilprojekte/Module).   In dem dreijährigen Projekt arbeitet das Grünlandzentrum Niedersachsen / Bremen Seite...
Tipo: Project description
Palavras-chave: Dairy cattle; Pasture and forage crops; Beef cattle; Composting and manuring; Nutrient turnover; Air and water emissions; Soil; Biodiversity and ecosystem services.
Ano: 2023

Reduzierte Bodenbearbeitung, Zwischenfrüchte und Transfermulch für einen bodenregenerierenden Anbau
Provedor de dados: Organic Eprints
Autores: Junge, Stephan; Jäckel, Ulf; Storch, Johannes; Kirchner, Sascha; Saucke, Helmut; Finckh, Maria R.
Spezialisierung, Intensivierung und Ökonomisierung erschweren Bodenstrukturverbesserung und den Pflanzenschutz im ökologischen Landbau. Um die nachhaltigen Ziele des Ökolandbaus zu erreichen muss parallel eine ökologische Intensivierung stattfinden. Durch Zwischenfrüchte, reduzierter Bodenbearbeitung und Mulch aus Gründüngern soll der Bodenzustand während des Anbaus verbessert, Erosion vermieden und der Pflanzenschutzaufwand verringert werden, für einen resilienten Anbau. In dem Workshop werden Akteure aus Praxis, Beratung und Wissenschaft ihre Erkenntnisse zum bodenschonenden Anbau zusammenfassen. In Arbeitsgruppen werden Fragen der Umsetzung, Herausforderungen und einer Vernetzung erörtert. Die abschließende Diskussion bietet Raum um offene Fragen und...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Vegetables; Root crops; Soil tillage; Biodiversity and ecosystem services.
Ano: 2019
URL: http://orgprints.org/36260/1/Beitrag_338_W02-01_Reduzierte-Bodenbearbeitung.pdf

Produzione ed utilizzo di substrati per la vivaistica, miglioramento delle teniche di gestione del suolo e delle strategie di fertilizzazione dei sistemi ortofrutticoli mediterranei da reddito condotti con il metodo dell' agricoltura biologica.
Provedor de dados: Organic Eprints
Con riferimento ai sistemi colturali ortofrutticoli meridionali, l’obiettivo della ricerca è quello di monitorare le principali tecniche di gestione del suolo adottate, di circostanziarne i principali elementi caratterizzanti e di individuare le tecniche più “critiche”, responsabili di limitare il grado di sostenibilità del sistema ed introdurre le strategie più efficienti per migliorarlo.  Su alcuni “casi studio”, rappresentati da sistemi colturali ortofrutticoli di pieno campo  e di serra, saranno realizzati interventi volti a modificare e migliorare le strategie e le tecniche di gestione della fertilità del suolo oggi in uso. Obiettivo specifico è quello di introdurre, nei sistemi orticoli di campo e di serra, tecniche di minimo avvicendamento...
Tipo: Project description
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Vegetables; Soil quality; Greenhouses and coverings; Composting and manuring.
Ano: 2023

Effects of conventional and organic land use types on water protection criteria in Germany
Provedor de dados: Organic Eprints
Autores: Kolbe, Hartmut.
The mean values and ranges of several water protection criteria were calculated for arable land, grassland and forests in Germany on the basis of research work and the literature. By additional evaluation steps, relationships and efficiency coefficients were calculated for the different types of land use. Methods of balance calculations are proposed as preventive strategies for efficient water protection.
Tipo: Report
Palavras-chave: Nutrient turnover; Soil; Crop husbandry; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/15628/1/kolbe%2D09%2Dwater%2Dprotection%2Dcriteria.pdf

Jord, avlinger og næringsbalanser ved økologisk drift.   Langtidsstudier på Tingvoll gard 1991-2013
Provedor de dados: Organic Eprints
Autores: Ebbesvik, Martha; Solemdal, Liv; Løes, Anne-Kristin; Serikstad, Grete Lene; Strøm, Turid.
Omlegging til økologisk drift ved Tingvoll gard startet etter at Norsk senter for økologisk landbruk (NORSØK) i 1987 inngikk leieavtale om garden. Fram til 1996 var gardsdrifta sterkt integrert i NORSØK sin virksomhet, med mål om å drive ei allsidig gardsdrift som kunne synliggjøre idégrunnlaget i økologisk landbruk. Siden 1996 har gardsdrifta vært organisert som et familiebruk, drevet av forpakter. Forpakterfamilien er avhengig av inntektene fra gardsdrifta, og de er forpliktet til å drive i tråd med reglene for økologisk produksjon. Av økonomiske, interesse- og arbeidsmessige årsaker har gardbrukerne valgt å konsentrere drifta om melkeproduksjon. Fra 2006 inngikk forpakterne samdrift med en nabogard, noe som ga økt melkekvote og grunnlag for økt...
Tipo: Report
Palavras-chave: Pasture and forage crops; Soil quality; Nutrient turnover; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/28178/1/BIOFORSK%20RAPPORT%20165%202014%20%20jord%20avlinger%20og%20n%C3%A6ringsbal.pdf

Stabilization and plant uptake of N from 15N-labelled pea residue 16.5 years after incorporation in soil
Provedor de dados: Organic Eprints
Autores: Laberge, Guillaume; Ambus, Per; Nielsen, Henrik Hauggaard; Jensen, Erik Steen.
The decline of N from 15N-labelled mature pea residues was followed in unplanted soil over 16.5 yr. Eight years after residue incorporation, 24% of the residue 15N input was still present in the soil and, after 16.5 yr, 16% of the residue 15N input remained. A double exponential model successfully described the decay of N from 15N-labelled pea residues. The total residual 15N declined with average decay constants of 1.45 yr−1 for the 30 d to 1 yr period and of 0.07 yr−1 for the 1–16 yr period. Sixteen years following incorporation of the residues, indicator plants growing in residues-amended soils were obtaining 1.7% of their N from residue N. This is, to our knowledge, the longest study on decay of N in soils from 15N-labelled crop residues. The current...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2006
URL: http://orgprints.org/11213/1/11213.pdf

Promising no-tillage organic systems for vegetable crops
Provedor de dados: Organic Eprints
Autores: Rystedt, Lotte.
News release from the Danish trials of SoilVeg
Tipo: Web product
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage; Vegetables.
Ano: 2017
URL: http://orgprints.org/33590/1/DCA%20English%20Newsletter_AU_Promising%20no-tillage%20organic%20systems%20for%20vegetable%20crops_Rystedt%2020171124.pdf

Development of a method for balancing soil organic matter in organic agriculture for practical application
Provedor de dados: Organic Eprints
Autores: Hoyer, Dipl.Ing.agr. Uta; Brock, Dipl.geogr. Christopher; Hülsbergen, Prof.Dr. Kurt-Jürgen; Leithold, Prof.Dr. Günter.
A cooperative research project was started on balancing of soil organic matter in organic agriculture.  Existing balancing methods do often not produce plausible results, especially when applicated to organic farming. Therefore the project aim is to evaluate balancing methods and to characterize soil organic matter reproduction in organic farming on the basis of examination of field trials and practice farms in order to revise and adapt coefficients and algorythms in the balance methods. First tentative results from the project confirm the need for a revision and improvement of balancing methods since they did not reflect the actual organic matter dynamic in selected trials sufficiently. Significant differences in soil organic matter reproduction could be...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil.
Ano: 2006
URL: http://orgprints.org/7221/1/Poster_OrgCon2006.doc

Residual effect and nitrate leaching in mixed crop rotations differing in grassland type, frequency and fertilizer history
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Askegaard, M.
The experimental area in Foulum for investigating residual effects of grassland hosts this part of the project. Over the last 9 years, three crop rotations have been build up with different frequency of grazed grassland (Table 1) including both unfertilised grass-clover and fertilised pure ryegrass. In 2003 we re-established grass-clover and ryegrass in all rotations for grazing  in 2004. In 2005 grasslands similar managed during the last three years (2002-2004) but with widely different grassland frequency in the rotation have been ploughed out. In these crop rotations during 1997-2004 grazed grassland has been present 2, 3 and 6 times equivalent to 25, 38 and 75% of the crop rotation. Thus, the long-term effect of composition and frequency of grasslands...
Tipo: Working paper
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2007
URL: http://orgprints.org/10622/1/10622.doc

Praxiseinführung und Evaluierung eines Kalkulationsschemas zur bedarfsgerechten N-Düngung im ökologischen Freilandgemüsebau
Provedor de dados: Organic Eprints
Autores: Laber, Hermann.
Im Rahmen des von der Sächsischen Landesanstalt für Landwirtschaft durchgeführten Projektes wurden auf sechs ökologisch bewirtschafteten Gemüsebaubetrieben Düngungsversuche zur Demonstration des möglichen Produktivitätszuwachses durch eine bedarfsorientierte N-Düngung und zur Evaluierung eines Kalkulationsschemas in verschiedenen Gemüsekulturen angelegt. Neben betriebsüblicher Düngung (meist nur in Form von Wirtschaftsdüngern) wurden Parzellen mit einer darüber hinausgehenden N-Düngung mit organischen Handelsdüngern sowie solche ohne Wirtschaftsdüngergaben integriert.  Zusätzlich zur Ertragserfassung konnte durch Bestandesanalyse die N-Nachlieferung des Bodens, die N-Freisetzung aus Wirtschafts- und organischen Handelsdüngern sowie die N2-Fixierung von...
Tipo: Report
Palavras-chave: Nutrient turnover; Vegetables; Composting and manuring.
Ano: 2003
URL: http://orgprints.org/5162/1/5162%2D02OE576%2Dlfl%2Dsachsen%2D2003%2Dduengung%2Dkalkul.pdf

Biochar as a Soil Amendment: A Review of the Environmental Implications
Provedor de dados: Organic Eprints
Autores: Woolf, Dominic.
The  term  'biochar'   refers  to black carbon  formed by  the pyrolysis of  biomass  i.e.  by heating biomass in an oxygen-free or low oxygen environment such that it does not (or only partially) combusts.   Traditional charcoal is one example of biochar produced from wood.  The term 'biochar' is much broader than this however, encompassing black carbon produced from any biomass feedstock.   The use of biochar as a soil additive has been proposed as a means  to simultaneously mitigate anthropogenic climate change whilst improving agricultural soil fertility.   This paper provides a review of what is known about both of these claims and also about the wider environmental implications of the adoption of this process.  The intention of this review is not...
Tipo: Report
Palavras-chave: Nutrient turnover; Soil quality; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/13268/1/Biochar_as_a_soil_amendment_%2D_a_review.pdf

Einsatzstrategien für Wirtschafts- und Sekundärrohstoffdünger im ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Mayer, Dr. Jochen.
Nährstoffkreisläufe im ökologischen Landbau werden für N, P, und K dargestellt, der Einsatz von Wirtschaftsdünger und Kompost, ihre Nährstoffwirkung und Vorschläge für die Anwendung werden diskutiert.
Tipo: Book chapter
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2006
URL: http://orgprints.org/8349/1/S_444_titelei_komplett.indd.pdf

Svaveltillgängligheten för jordbruksgrödor: betydelsen av stallgödsel, markens organiska material och mineralgödselmedel i konventionell och ekologisk odling
Provedor de dados: Organic Eprints
Svaveldepositionen och svavelinnehållet i gödselmedel har minskat markant. En konsekvens är att svavelbrist uppkommer. Huvudfråga: Hur mycket organiskt svavel kan omvandlas i marken till växttillgängligt sulfat genom mikroorganismernas aktivitet, och kan organiskt svavel i kreatursgödsel också bidra till grödornas svavelförsörjning? Delfrågor:                 1. Hur är sulfatbildningen via mikroorganismerna kopplad till svavlets kemiska och fysiska bindningsformer?        2. Hur mycket sulfat kan raps (stort svavelbehov) och korn (måttligt svavelbehov) erhålla från kreatursgödsel jämfört med direkt sulfattillförsel från gips (kalciumsulfat)?        3. Vilka är de långsiktiga effekterna av kreatursgödsel på grödornas svaveltillgång?
Tipo: Project description
Palavras-chave: Nutrient turnover.
Ano: 2023

Stickstoffflüsse in verschiedenen Fruchtfolgen des ökologischen Landbaus – Ergebnisse aus dem CONBALE-Projekt Lindhof
Provedor de dados: Organic Eprints
Autores: Ruhe, Iris; Loges, R.; Taube, F.
Problemstellung/Ziele:  Stickstoff (N) stellt bei ökologischer Bewirtschaftung von viehlosen Betrieben den ertragsbegrenzenden Faktor dar. Der N-Versorgungsgrad eines Betriebes wird im wesentlichen durch den Leguminosenanteil in der Fruchtfolge bestimmt. Hierbei beeinflusst vor allem die Nutzung der Leguminosen (als Gründüngung, Silagegewinnung, Körnerleguminose oder Zwischenfrucht) den N-Input. Die Optimierung der N2-Fixierungsleistung der Leguminosen und ein möglichst geschlossener N-Kreislauf im Betrieb bilden die Grundlage des N-Managements. N-Verluste in Form von Nitratauswaschung führen neben dem Verlust des wichtigsten Produktionsfaktors (Stickstoff)auch zu einer Belastung des Grundwassers bzw. anderer Ökosysteme. Ziel dieses Projektes ist daher die...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions.
Ano: 2003
URL: http://orgprints.org/4527/1/4527%2Druhe%2Di%2D2003%2Dstickstoffeinfluesse.pdf.pdf

Kløvergræs ensilage og kompost som grøngødning
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Ambus, Per; Petersen, Søren O.; Sørensen, Peter.
En ny strategi kan måske forbedre udnyttelsen af det kvælstof, som fikseres af kløverplanter i økologisk planteavl. Vores studie viste en større frigivelse af kvælstof fra ensileret kløvergræs end fra kompost af kløvergræs iblandet halm. Samtidig fandt vi, at indarbejdning af grøngødning ved harvning frem for pløjning reducerede udledningen af den stærke drivhusgas, lattergas.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2013
URL: http://orgprints.org/24959/14/24959.pdf

Nye muligheder i øko grønsagssædskifter
Provedor de dados: Organic Eprints
Autores: Nielsen, Stig Feodor.
Artikel fra åbent avlermøde ved AU-FOOD Årslev med en række oplæg af AU-FOODs forskere og Gartnerirådgivningens rådgivere om projekter om økologisk grøntsagsproduktion  DoubleCrop, SoilVeg and SureVeg. Efterfulgt af markvandring med fremvisning af forsøg med overvintrende grøntsager i DoubleCrop projektet.
Tipo: Newspaper or magazine article
Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover; Soil tillage; Air and water emissions; Vegetables; Root crops.
Ano: 2019
URL: http://orgprints.org/35457/3/Gartnertidende%20nr.%205%20s.%2049-50%2011-04-2019%20fra%20%C3%A5bent%20avlerm%C3%B8de%2005-03-2019.pdf

Improving N use and performance of arable crops on organic arable farms using an expert group approach (OF0178)
Provedor de dados: Organic Eprints
Autores: Anon,.
This is the final report for Defra project OF0178.  Government seeks to support the development of organic farming in the UK, but nitrogen (N) almost always limits productivity on organic farms.  This project devised guidance by which farmers could manage N to best effect on organic land.  ‘Experts’ in i) organic farming systems, ii) manure management, iii) N cycling in farming systems and iv) crop N responses and N fixation, working through Case Studies representing arable and mixed organic systems and reviewing relevant literature, devised changes which would a) increase the availability of N for crop uptake, b) decrease losses of N to the environment, and c) be acceptable to farmers.   Nitrogen (N), phosphorus (P) and potassium (K) budgets were...
Tipo: Report
Palavras-chave: Nutrient turnover; Technology transfer; Composting and manuring.
Ano: 2002
URL: http://orgprints.org/8066/2/OF0178_2075_FRP.pdf

Kvävemineraliseringsförlopp efter gödsling med organiska gödselmedel vid olika tidpunkter
Provedor de dados: Organic Eprints
För att kvävet i organiska gödselmedel ska kunna utnyttjas så effektivt som möjligt för maximalt skördeutbyte och minimerade förluster till omgivande miljö, måste dess tillgänglighet för växterna synkroniseras med växtens kväveupptag. Genom att kartlägga mineraliseringsförloppet under fältbetingelser kan man bedöma när det ännu inte mineraliserade kvävet borde bli växttillgängligt i förhållande till spridningstidpunkten. Detta behövs för att avgöra när man bör sprida gödseln för att få maximal växtnäringseffekt.                                                                Projektet syftar till att studera mineraliseringsförloppet av kväve efter gödsling under naturliga temperaturförhållanden efter olika spridningstidpunkter. Detta görs genom inkubering...
Tipo: Project description
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2023

Nitratudvaskning fra økologiske og konventionelle planteavlsbedrifter - simuleringer med FASSET bedriftsmodellen
Provedor de dados: Organic Eprints
Autores: Berntsen, J.; Petersen, B.M.; Kristensen, I.S.; Olesen, J.E.
Med udgangspunkt i regnskabsdata fra Fødevareøkonomisk Institut (FØI) og data fra Centrale Registre (CR) blev importen af kvælstof (N) i gødning til marken til konventionelle og økologiske planteavlere  estimeret til hhv. 129 og 51 kg N ha-1 år-1. Desuden blev der med udgangspunkt i den aktuelle afgrødefordeling opstillet et generelt sædskifte for hver af de to systemer. Det opstillede sædskifte for den økologiske planteavl havde en høj andel af vårsæd og desuden 20% kløvergræs, mens den konventionelle planteavl var domineret af kornafgrøder primært i form af vintersæd.   Med baggrund i disse model-sædskifter blev N-balancen på markniveau beregnet ved anvendelse af FASSET modellen. Dette inkluderede også N-udvaskning og ændring i jordens N-pulje. Alle...
Tipo: Report
Palavras-chave: Nutrient turnover; Soil; Soil biology; Soil quality; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/4653/1/4653.pdf

Does early spring grazing stimulate spring grass production?
Provedor de dados: Organic Eprints
Autores: Eekeren, N. van; Rietberg, P.I.; Iepema, G; Wit, J. de.
Early spring grazing may stimulate grass growth in spring by increasing grass root exudation, which enhances mineralization. The objective of this study was to investigate the net effect of early spring grazing on spring grass production. Therefore, we conducted two field experiments on production grasslands. Simulated early spring grazing negatively affected the yield of the first cut: compared to ungrazed plots on sandy soil an a tendency on clay soil, dry matter yield of early-plots was reduced by 20% (sand, P=0.009) and 12% (clay, 0.062), respectively. These differences were partly compensated in later cuts. Despite the negative effect on grass yield of the first cut, early grazing positively affected the crude protein (CP) content of the grass in the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/29463/1/2925.pdf

Intensify pastures for livestock production: vermicompost use, an agro-ecological practice
Provedor de dados: Organic Eprints
Autores: Boval, Maryline; Faverial, J.; Mulciba, P.; Loranger-Merciris, G.L.M.; Sierra , J.
The intensification of animal production at pasture is essential to meet the growing demand for animal products but also for other functions, the maintenance of areas, livelihoods and well-being of populations. This intensification must also take into account the reduction of agricultural land, promote positive interactions with the environment and biodiversity, while ensuring the supply of populations. The use of vermicompost involving the action of earthworms is an example of agro-ecological practices, to participate in the intensification of grassland and which has been studied in the context of a call to project, AGRIBIO3. Besides the fact that this practice makes it possible to achieve a proper recycling and recovery of various manures, it improves...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Health and welfare.
Ano: 2013
URL: http://orgprints.org/26208/1/Boval_2013_CIAG_Vol32.pdf

Soil Nutrient Evolution during the First Rotation in  Organic and Conventional Farming Systems
Provedor de dados: Organic Eprints
Autores: Sanchez de Cima, Diego; Reintam, Endla; Tein, Berit; Eremeev, Viacheslav; Luik, Anne.
Since 2008, a 5-year crop rotation experiment (winter wheat, pea, potato, barley undersown with red clover, and red clover) has been run in Tartu, Estonia, to evaluate the changes in soil chemical parameters under four fertilizer managements: (1) unfertilized conventional plots (conventional I), (2) conventional plots with addition of mineral fertilizers (conventional II), (3) organic plots with cover crops during the winter period (organic I), and (4) organic plots with the same cover crops plus a yearly amendment of 40 t ha–1 of cattle manure (organic II). After the first rotation, results showed significant differences (P &lt; 0.05) in soil acidity dependent on the system with mean values ranging between 5.67 (conventional II) and 6.10 (organic II). In...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover; Crop husbandry; Soil.
Ano: 2015
URL: http://orgprints.org/29490/1/S%C3%A0nchez%20de%20Cima%20et%20al%202015.pdf

Lichtangebot und Bodentemperatur in Winterroggen unterschiedlicher Bestandesdichte und deren Konsequenzen für die Stickstoffmineralisation
Provedor de dados: Organic Eprints
Autores: Raupp, Dr Joachim.
According to literature reports farmyard manure application caused higher amounts of microbial activity in soils compared to mineral fertilizers. If lab tests have been carried out (e.g. enzyme activity, microbial biomass) results can be attributed to soil properties, as experimental conditions have been constant. With plots of a long-term field trial it has been studied whether organic or mineral fertilization has any effect on soil temperature (depending on different crop density in each treatment) and, by this way, also on N mineralization.  Soil temperature was higher in organically than in minerally fertilized winter rye, but only on sunny days, not on cloudy ones. Differences have been measured to a soil depth of 15 cm. However, N mineralization did...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology.
Ano: 1999
URL: http://orgprints.org/757/1/rawitabe.pdf

Do nutrient uptakes and grain yields differ between spring barley varieties grown for organic farming as mono-crop and in mixture: Characteristics of spring barley varieties for organic farming
Provedor de dados: Organic Eprints
Autores: Nielsen, Professor N.E.; Thomsen, Senior Scientist I.K.; Berntsen, Senior Scientist J.
Manure application increased yield. Hence the study was conducted under the conditions of moderate nutrient stress and in all probability nitrogen stress.   Under this condition nutrient uptakes, biomass production and grain yields did vary between Otira, Orthega, Landora, Brazil, Svani, NK96-300, Mixture 1 (Otira, Orthega, Landora) and Mixture 2 (Brazil, Svani and NK96-300). Interaction between variety and soil fertility treatments were also significant. These findings open new possibilities for selection or plant breeding for genotypes with improved capability of nutrient acquisition from soils at different soil fertility levels e.g. in organic farming.  Cropping of barley varieties in mixtures seems to increase (stimulate) nutrient uptakes (N, P, S, K,...
Tipo: Working paper
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/2449/1/BAR_OF_2449.pdf

Nitrate leaching and growth of cereal crops following cultivation of contrasting temporary grasslands
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Intensive dairy farming with low N use efficiencies may have adverse environmental impact through nitrate leaching. The residual effects of six different temporary grasslands (1994-96) on yield and nitrate leaching in the following cereal crops (1997-99) were investigated on a loamy sand in central Jutland. The grasslands were unfertilized grass-clover and fertilized ryegrass subject to cutting or continuous grazing by dairy cows with two levels of N in feed supplements. In the first year there was sufficient residual effect of the grazed grasslands to obviate the need for supplementary fertilizer, but in the following years gradually more fertilizer N was required to obtain optimal yields. Nitrate leaching decreased as a function of time after cultivation...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/156/1/paper.doc

Viden om rodvækst er nyttig
Provedor de dados: Organic Eprints
Autores: Thorup-Kristensen, Kristian.
Artiklen beskriver de meget store forskelle i rodvækst, der findes imellem de plantearter vi dyrker, med fokus på grønsagsafgrøder og efterafgrøder. Roddybde og rodvæksthastighed af de forskellige arter behandles. Den viden, vi har om afgrødernes forskellige rodvækst, kan bruges til at lave sædskifter med en bedre kvælstofudnyttelse og til at undgå kvælstofudvaskning.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Production systems; Vegetables.
Ano: 2002
URL: http://orgprints.org/1125/1/roddybde.pdf

Barley undersown with red clover in organic and conventional systems: nitrogen aftereffect on legume growth
Provedor de dados: Organic Eprints
Autores: Alaru, Marika; Talgre, Liina; Luik, Anne; Tein, Berit; Eremeev, Viacheslav; Loit, Evelin.
Nitrogen (N) deficiency is a major problem in organic and low-input farming systems. Growing spring cereals with  undersown legumes has a positive effect on soil fertility, enriching it with nitrogen, through symbiosis of legumes  with nodule bacteria. Two hypotheses were tested: 1) undersowing of red clover increases the protein content of  barley grains and 2) mineral N has negative aftereffect on growth of legume plants. The aim of this study was to  investigate the effect of organic (cattle manure, off-season cover crop) and mineral N in organic and conventional  farming systems on (i) barley (Hordeum vulgare L.) grain yield and quality, (ii) biomass yield formation of  undersown red clover (Trifolium pratense L.) and (iii) the aftereffect of mineral...
Tipo: Journal paper
Palavras-chave: Soil quality; Farming Systems; Nutrient turnover; Crop husbandry; Soil tillage; Soil.
Ano: 2017
URL: http://orgprints.org/32508/1/Alaru%20et%20al%202017.pdf

Meer houvast voor de bemesting in de biologische kleinfruitteelt
Provedor de dados: Organic Eprints
Autores: Hendrickx, Yves; Vervaeke, Ine; Jacobs, Paul.
Informatie over de specifieke bemestingsbehoeften van (biologisch) kleinfruit is beperkt. Er is een groot assortiment aan teelten en er zijn verschillende teeltwijzen. Ook de bemesting op de bedrijven gebeurt zeer verschillend. Een eerste doelstelling van het project was om correct om te gaan met bemestingsadviezen.   In dit project werd  voor een éénjarige bemestingsproef de invloed van verschillende bemestingsregimes op gewasontwikkeling en opbrengst van herfstframboos bepaald. Ook werd het verband tussen de nutriëntenvoorraad in bodem, blad en plantsap aan de hand van verschillende analyses onderzocht. Na het eerste jaar bleek het ook interessant om in het  project de mogelijkheden van maaimeststoffen in de kleinfruitteelt verder te bekijken.  Het was...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Fruit and berries; Farm nutrient management.
Ano: 2016
URL: http://orgprints.org/29997/1/vv%20bemesting%20kleinfruit%20pamel%202014%202015.pdf

Greenhouse gas emissions from cultivation of energy crops may affect the sustainability of biofuels
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Hauggaard-Nielsen, Henrik; Heiske, Stefan; Thomsen, Sune T.; Jensen, Morten; Schmidt, Jens Ejbye; Johansen, Anders; Ambus, Per.
Field emissions of N2O during cultivation of bioenergy crops may counterbalance a considerable part of the avoided fossil CO2 emissions that are achieved by fossil fuel displacement
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2011
URL: http://orgprints.org/18331/4/18331.pdf

Kvävefixering i rödklöverrika vallar, kvantifiering av kväve i hela växten samt kväve utsöndrat från rötter
Provedor de dados: Organic Eprints
En kvävebudget är ett verktyg för att bestämma utnyttjandegraden av kväve i ett odlingssystem liksom för att bedöma risker för förluster till omgivande ekosystem. Det är också ett verktyg för att utvärdera effekter av insatta åtgärder på utnyttjande och förluster. För att upprätta en budget krävs tillförlitliga data över tillförsel, bortförsel med produkter samt förluster. Tillförseln av kväve genom biologisk fixering är ofta svår att uppskatta, vilket gör budgetberäkningar osäkra. I ekologiska produktionssystem är detta särskilt påtagligt eftersom det primära tillskottet av kväve sker helt eller till stor del genom kvävefixering i slåtter-, betes- och gröngödslingsvallar eller andra baljväxtgrödor. Det är därför avgörande att kunna kvantifiera mängden...
Tipo: Project description
Palavras-chave: Nutrient turnover; Pasture and forage crops; Farm nutrient management.
Ano: 2023

Field-scale spatial variation in yields and nitrogen fixation of clover-grass leys and in soil nutrients
Provedor de dados: Organic Eprints
Autores: Nykänen, Arja; Jauhiainen, Lauri; Kemppainen, Jukka; Lindström, Kristina.
Biological nitrogen fixation (BNF) plays a crucial role in organic farming and red clover (Trifolium pratense) is cultivated widely in boreal grasslands for BNF. A geostatistical method, model-based kriging, was used to determine the spatial variation in yield, clover content and BNF of clover-grass leys as well as soil chemical properties throughout two fields in 2004-2006. Based on this variation, principal component analysis (PCA) was used to determine the similar patterns of variation. On one location, total dry matter yields of the leys decreased over three production years from 9 700 to 4 100 kg ha-1, clover content from 53 to 26% and BNF from 150 to 40 kg N ha-1, whereas on the other location the yields increased from 6 500 to 7 100 kg ha-1, clover...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/16628/1/nykanen.pdf

Eftervirkning af afgræsningsmarker og husdyrgødning
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Sørensen, P.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2002
URL: http://orgprints.org/228/1/N%2Dtemadag_JE_indl%C3%A6g.doc

Grønsagssædskifte uden tilførsel af gødning
Provedor de dados: Organic Eprints
Autores: Thorup-Kristensen, Kristian.
Kort omtale af resultater fra det økologiske grønsagssædskifte i Årslev. Sædskiftet er dyrket uden gødningstilførsel, og der er i artiklen lagt vægt på diskusionen af kvælstofdynamik og på resultater der viser en stor virkning af grøngødning udlagt i korn som derefter kun har efteråret at gro i, i sammenligning med grøngødning der optager en hel dyrkningssæson.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Production systems; Vegetables.
Ano: 2002
URL: http://orgprints.org/1129/1/groensagssaedskifte.pdf

Multispectral remote sensing in participatory on-farm variety trials
Provedor de dados: Organic Eprints
Autores: Drexler, Dora; Kovács, Tina; Varga, Korinna.
On the one hand, through the analysis of remote sensing images, it was possible to determine weed infestation, field heterogeneity and NDVI values/pixel (app. 1 cm per pixel). In some cases, we even discovered previously unknown underground field objects (e.g. a drainage system from the 70s).   On the other hand, NDVI data did not correlate with traditional sampling results (SPAD values and yield estimations), probably because the multicopter covered 100 % of the large plot area, while sampling only provided data from specific points (50 SPAD points/plot and three yield sampling quadrats/plot). We can thus assume that for large plot variety trials, remote sensing can give substantially more precise results than traditional sampling methods. Further tests...
Tipo: Practice tool
Palavras-chave: Soil quality; Nutrient turnover; Soil; Weed management; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/32539/1/PA_021_OEMKI_Remote_Sensing_final.pdf

Des cultures de service dans les vignes pour gérer l'eau et la fertilité des sols en viticulture
Provedor de dados: Organic Eprints
Autores: Gary, Christian; Metral, Raphaël; Garcia, Leo; Metay, Aurélie.
&gt; Services intrants, services produits et compromis  &gt; Impacts de l’enherbement sur la disponibilité des ressources hydriques et azotées  &gt; Compromis entre services et gestion adaptative  &gt; Traits fonctionnels et services
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Weed management; Viticulture.
Ano: 2016
URL: http://orgprints.org/30337/1/JSVV8_Gary%26Metral_vf.pdf

Water soluble phosphate fertilizers for crops grown in calcareous soils - an outdated paradigm for recycled phosphorus fertilizers
Provedor de dados: Organic Eprints
Autores: Meyer, G.; Frossard, E.; Mäder, P.; Nanzer, S.; Randall, D.G.; Udert, K.M.; Oberson, A.
Background and aims  The current paradigm for phosphorus (P) fertilizers applied to calcareous soil is that almost entirely water soluble P fertilizers are efficient and sparingly soluble P fertilizers are not efficient P sources for crops. We hypothesize that this paradigm does not apply to recycled P fertilizers and that other P pools can explain the plant use of recycled P fertilizers on calcareous soil.  Methods  We applied 33P isotopic dilution method to evaluate recycled P fertilizers based on plant P uptake from fertilizer relative to plant uptake from a water soluble P reference fertilizer. The predictability of fertilizer effectiveness based on sequentially extracted P forms and X-ray diffraction pattern of recycled fertilizers derived from sewage...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/32919/1/Meyer2018-Water%20soluble%20phosphate%20fertilizers%20for%20crops%20grown%20in%20calcareous%20soils%20%E2%80%93%20an%20outdated%20paradigm%20for%20recycled%20phosphorus%20fertilizers.pdf

Genetic differences in root mass of Lolium perenne varieties under field conditions
Provedor de dados: Organic Eprints
Autores: Deru, Joachim; Schilder, Henk; Schoot, Jan Rinze, van der; Eekeren, N. van.
Although grasses have dense rooting systems, nutrient uptake and productivity can be increased, and N-leaching reduced, if rooting is further improved. The variation in root mass of 16 varieties of Lolium perenne was studied under field conditions in two experiments on sandy soil in The Netherlands.The chosen varieties differed in genetic and aboveground characteristics such as ploidy, productivity and grass cover. Root dry matter (RDM) was measured in the 0–8, 8–16 and 16–24 cm soil layers. In summary, we found that RDM of perennial ryegrass differed significantly between arieties under field conditions. These differences were not linked to grass yield, which indicates that it is possible to select perennial ryegrass varieties that combine high...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Biodiversity and ecosystem services.
Ano: 2014
URL: http://orgprints.org/26239/1/2903.pdf

Unkrautregulierung im Silomaisanbau durch präventive, systemare Maßnahmen in der Fruchtfolge- und Anbaugestaltung (Verbundvorhaben)
Provedor de dados: Organic Eprints
Das hier beschriebene Verbundvorhaben umfasst folgende Teilprojekte: FKZ 15OE093, FKZ 15OE128 und FKZ 15OE129.  Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/id/saved_search/1754.   In dem Vorhaben soll die Unkrautregulierung im Silomaisanbau, eines der bedeutendsten Anbauprobleme besonders in der Ökologischen Landwirtschaft, durch einen präventiven Ansatz in der Fruchtfolge- und Anbaugestaltung optimiert werden. Dazu soll die systemare Untersuchung eines Fruchtfolgegliedes aus Wintererbsen in Reinsaat oder im Gemenge mit Triticale bzw. Winterwicken in Reinsaat oder im Gemenge mit Roggen als Vorfrüchte/Erstkulturen und anschließendem...
Tipo: Project description
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Soil tillage; Weed management.
Ano: 2023

Entwicklung der Humusgehalte in Abhängigkeit von  Fruchtart/Anbausystem in einem Dauerfeldversuch
Provedor de dados: Organic Eprints
Autores: Brock, Christopher; Leithold, Prof.Dr. Günter; Schulz, Franz.
Year-to year changes of soil organic matter (SOM) have been surveyed in a long-term  experiment in order to allow for crop/cropping system impact assessment. Legumes  usually caused SOM build-up, which on the other hand only to a short extend  remained during the succeeding years. Considerable SOM decrease could be found  under potatoes. SOM dynamics under cereals varied strongly according to aspects of  the respective cropping system, especially precrop and fertilization. Green manure but  also farmyard manure obviously increased short-term decomposable fractions of  SOM, promoting mineralization of SOM in the following period. Long-term changes of  SOM in the experiment were somewhat less pronounced than year-to-year changes,  pointing on the high...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions.
Ano: 2009
URL: http://orgprints.org/14564/1/Brock_14564.pdf

Utilization of nitrogen (N) and phosphorus (P) in an organic dairy farming system in Norway
Provedor de dados: Organic Eprints
Autores: Steinshamn, Håvard; Thuen, Erling; Bleken, Marina Azzaroli; Brenøe, Ulrik Tutein; Ekerholt, Georg; Yri, Cecilie.
Inputs of N and P, flows through the soil–plant–animal pathway and removals by products were recorded for 3 years at the organically managed prototype dairy farm ‘Frydenhaug’ in Norway to assess the transfer efficiencies of N and P within and at the farm level. Nutrient balances and efficiency (N or P in products divided by N or P in inputs) were compared to data from other studies of dairy farm systems in Europe. Plant production on the farm covered nearly all the needs by the herd. However, about 10% of the plant production was sold as cash crop and about the same amount was bought as feed. At the farm level, ‘Frydenhaug’ realized annually and on average lower surpluses and higher N or P efficiencies than found in most studies concerned. On average, N...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Pasture and forage crops; Dairy cattle; Farming Systems.
Ano: 2004
URL: http://orgprints.org/2680/1/2680.pdf

The role of ectomychorrizal fungi in nitrogen acquisition in California oak woodlands.
Provedor de dados: Organic Eprints
Autores: T. AL DAMRAT, Rasha.
In northeastern California oak woodland, we measured Nitrogen uptake by ectomycorrhizal (ECM) oak roots (Quercus douglasii, blue oak, Quercus wislizenii, live oak). In February 2005, after sampling fine roots of 5 blue and 5 live oaks, we added 15NH4+ to soils, waited one month then resampled. ECM root tips were separated into 21 morphotypes and analyzed for 15N.  Blue oak ECM diversity was higher than that in live oak. Few morphotypes (33%) were common to both oak species. More abundant morphotypes took up less 15N than less abundant morphotypes. We hypothesized that ECM species more ‘active’ in N uptake would be more frequent in soil cores. However, our data did not support our hypothesis; and ECM species present in few cores were more enriched in 15N...
Tipo: Thesis
Palavras-chave: Nutrient turnover; Soil; Soil biology.
Ano: 2005
URL: http://orgprints.org/7011/1/RashaAldamatar05.pdf

Effects of plant residues on crop performance, N mineralisation and microbial activity including field CO2 and N2O fluxes in unfertilised crop rotations
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.; Hansen, E.M.; Olesen, J.E.
The impacts of crop rotation and input of organic matter in the form of green manure crops, straw residues and incorporation of catch crops on crop yield, nitrogen uptake, microbial biomass and activity was studied in unfertilised crop rotations differing in input of plant residues, i.e. high-input rotations with a grass-clover crop and catch crops included and low-input cereal rotations without catch crops. The parameters studied included substrate induced respiration (SIR), hydrolysis of fluorescein diacetate (FDA), arylsulfatase activity (ASA), N mineralisation, N2O emission, and soil respiration. These parameters were measured in bare soil plots, to estimate the effects of previous years crops and input of plant residues. In neighbouring plots crop...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology; Soil quality; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/4012/1/Vinther%2C_Hansen_Olesen_2004.pdf

IMPACT OF AGRICULTURAL MANAGEMENT ON COMMUNITIES OF ORIBATIDA, GAMASINA AND COLLEMBOLA IN ITALIAN AND FRENCH VINEYARDS
Provedor de dados: Organic Eprints
Autores: Simoni, S.; Gagnarli, E.; Goggioli, D.; Guidi, S.; Tarchi, F.; D'Avino, L.; Giffard, B.
Quantitative and qualitative analyses among the soil microarthropods can be used in biomonitoring as tools in multi-disciplinary approach to characterize soil quality. Three groups of microarthropods - Collembola and Oribatida as detrivores and Gamasina as predators - were selected to evaluate the impact of different management treatments adopted to recover degraded soil in organic. Differences in arthropod populations between French and Italian sites were registered. In Italy, after two years of recovering treatments, an increase of the abundances of all groups, particularly detritivores in degraded plots, was observed. The population of gamasids increased, in all sites, only in non degraded plots. Soil invertebrates of similar trophic groups, like...
Tipo: Journal paper
Palavras-chave: Soil quality; Soil biology; Composting and manuring; Nutrient turnover; Soil; Biodiversity and ecosystem services.
Ano: 2018
URL: http://orgprints.org/33467/1/7902-25721-1-PB.pdf

Nitrate leaching and N2-fixation in grasslands of different composition, age and management
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Vinther, F.P.; Søegaard, K.
Grass-legume associations may offer a way of improving the N efficiency of dairy farming, but may also have adverse impact on the environment by increased leaching losses. Nitrate leaching from four cropping sequences with different grassland frequency and management (long-term grazed, long-term cut, cereals followed by 1 and 2-year grazed leys) were investigated on a loamy sand in central Jutland for both unfertilised grass-clover (perennial ryegrass [Lolium perenne L.]/white clover [Trifolium repens L.]) and fertilised perennial ryegrass (300 kg N/ha) during 1997-2002. Furthermore, one year (2001) of N2 fixation in 1, 2 and 8-year-old grass-clover pastures was determined. Nitrate leaching from grazed unfertilised grass-clover was always considerably...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/3664/1/3664.pdf

Biomass production, symbiotic nitrogen fixation and inorganic N use in dual and tri-component annual intercrops
Provedor de dados: Organic Eprints
Autores: Andersen, Mette Klindt; Hauggaard-Nielsen, Henrik; Ambus, Per; Jensen, Erik Steen.
The interspecific complementary and competitive interactions between pea (Pisum sativum L.), barley (Hordeum vulgare L.) and oilseed rape (Brassica napus L.), grown as dual and tri-component intercrops were assessed in a field study in Denmark. Total biomass production and N use at two levels of N fertilisation (0.5 and 4.0 g N/m2), were measured at five harvests throughout a growing season. All intercrops displayed land equivalent ratio values close to or exceeding unity, indicating complementary use of growth resources. Whereas both rape and barley responded positively to increased N fertilisation, irrespective of whether they were grown as sole- or intercrops, pea was strongly suppressed when grown in intercrop. Of the three crops barley was the...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions.
Ano: 2004
URL: http://orgprints.org/6002/1/MKA.pdf

Sensitivity of soil phosphorus tests in predicting the potential risk of phosphorus loss from pasture soil
Provedor de dados: Organic Eprints
Autores: Soinne, Helena; Saarijärvi, Kirsi; Karppinen, Minna; Hartikainen, Helinä.
The objective of this study was to examine the effects of urine and dung additions on the phosphorus (P) chemistry of pasture land and to compare the sensitivity of two soil extraction methods in assessing the P-loading risk. In a field experiment, urine and dung were added to soil in amounts corresponding to single excrement portions and the soil samples, taken at certain intervals, were analysed for pHH2O, acid ammonium acetate extractable P (PAc) and water extractable total P (TPw), and molybdate reactive P (MRPw). Urine additions immediately increased soil pH and MRPw, but no such response was observed in PAc extraction due to the low pH (4.65) of the extractant enhancing the resorption of P. The PAc responded to the dunginduced increase in soil total...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/17079/1/soinne.pdf

Stickstoffausnutzungseffizienz von 15N-markierter Schafsgülle  und 15N-markiertem Mineraldünger in biologisch und  konventionell bewirtschafteten Anbausystemen
Provedor de dados: Organic Eprints
Autores: Bosshard, Christine; Sorensen, Peter; Frossard, Emmanuel; Mayer, Jochen; Mäder, Paul; Nanzer, Simone; Oberson, Astrid.
Nitrogen (N) utilisation by crops has to be improved to minimize losses to the  environment. We investigated N use efficiency of animal manure and mineral fertiliser  and fate of fertiliser N not taken up by crops in a bio-organic (BIOORG) and a  conventional (CONMIN) cropping system of a long-term experiment over three  vegetation periods (wheat-soybean-maize). Microplots received a single application of  15N-labelled slurries or mineral fertiliser. At the end of each vegetation period we  tested whether higher microbial activity and biomass in BIOORG than CONMIN soils  and lower long-term N input level in BIOORG affected use efficiency and fate of  fertiliser N not taken up by crops. In total 41%, 15% and 50% of 15N applied as urine,  faeces and mineral...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2009
URL: http://orgprints.org/14392/1/Bosshard_14392.pdf

FieldEco – a multi-purpose biologically driven food web model
Provedor de dados: Organic Eprints
Autores: Axelsen, Jørgen Aagaard; Sønderskov, Mette; Bruus-Pedersen, Marianne; Tybirk, Knud; Eriksen, Jørgen.
We here present a food web model (FieldEco) that has been constructed to simulate complicated eco-system processes in a food web that includes both the soil and above ground ecosystems and connec-tions between them. FieldEco has been designed to work at the species level. The model is driven by climatic input, and both the population dynamics and the interactions between species are simulated according to the ideas presented by Gutierrez (1996).   FieldEco is equipped with a user interface from which it is possible to design an ecosystem of interest from a list of parameterised species. Presently, this list of parameterised species consists mainly of species that are common in Danish agricultural fields, and it is possible to manipulate their biological...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology; Biodiversity and ecosystem services.
Ano: 2004
URL: http://orgprints.org/4659/2/4659.pdf

kansen voor pluimveemest
Provedor de dados: Organic Eprints
Autores: Staps, Sjef.
Pluimveemest is een hoogwaardige meststof met veel stikstof, fosfaat en kali. De hoge fosfaatwaarden maken de afzet echter moeilijk. Akkerbouwers kunnen een beperkte  hoeveelheid fosfaat per hectare uit dierlijke mest per jaar op hun land brengen.  Pluimveemest bevat vaak evenveel stikstof als fosfaat. Door de fosfaatbeperking kan met deze mest dan vaak niet genoeg stikstof op het land kan worden gebracht.  Het project ‘Kippenmest &amp; Kringloop’ was vooral bedoeld om te onderzoeken hoe de stikstof-fosfaat verhouding kan worden aangepast, zodat deze mest beter bruikbaar is  voor de teelt van gewassen. In dit BioKennisbericht vindt u informatie over de verschillende mogelijkheden.
Tipo: Other
Palavras-chave: Composting and manuring; Nutrient turnover; Poultry; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/19248/1/173016.pdf

Langzeituntersuchung der Kohlenstoff- und Stickstoffkreisläufe eines intensiven ökologischen Betriebssystems – am Beispiel des Versuchsgutes Scheyern
Provedor de dados: Organic Eprints
Autores: Küstermann, B; Hofmann, M; Schmid, H; Gerl, G; Kainz, M; Hülsbergen, K J.
Carbon, nitrogen and energy flows are considered as an appropriate basis to characterize farming systems and to evaluate the environmental effects. Using the model REPRO the carbon and nitrogen flows of the experimental farm “Klostergut Scheyern” have been evaluated since 1991 on the basis of complete cultivation data as well as with the help of detailed site and weather data. Thus “Scheyern” is characterised as an intensive organic farming system with a high turnover of C and N.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/3746/1/3746.pdf

Omlægning til økologisk jordbrug i et lokalområde. Scenarier for natur miljø og produktion
Provedor de dados: Organic Eprints
Autores: Langer, Vibeke; Dalgaard, Tommy; Heidmann, Tove; Elmegaard, Niels; Mogensen, Lisbeth; Odderskær, Peter; Hasler, Berit.
Delprojektet om Natur- og miljøscenarier formulerede 4 måder at omlægge 25% af et konkret værkstedsområde til økologisk jordbrug. I scenariet ”Mælk” var det fortrinsvis kvægbrug, der blev omlagt. Scenariet ”1997” var også domineret af mælkeproducenter, men med et tillæg af planteavlsbedrifter. Scenariet ”Planter/svin” omfattede udelukkende svine- og planteavlsbrug, og scenariet ”Selvforsyning” omfattede bedrifter i et udpeget SFL-område, som ikke måtte supplere produktionen med indkøbt foder. Resultaterne pegede på en tendens til fald i kvælstofudvaskningen i hele området i tre scenarier, mens der var uklarhed m.h.t. det fjerde - ”Planter/svin”- scenariet. Belastningen med pesticider blev reduceret. I scenarierne ”Mælk” og ”1997”var reduktionen mindre end...
Tipo: Report
Palavras-chave: Nutrient turnover; Production systems; Production systems; Biodiversity and ecosystem services; Farming Systems.
Ano: 2002
URL: http://orgprints.org/1574/1/rap_12.pdf

Agronomic performance of annual self-reseeding legumes and their self-establishment potential in the Apulia region of Italy.
Provedor de dados: Organic Eprints
Autores: Driouech, Noureddin; Abou Fayad, Fady; Ghanem, Ala'a; Al-Bitar, Lina.
The agronomic performance, biological nitrogen fixation (BNF) ability and self-establishment potential of seven species of annual self-reseeding legumes were investigated in Apulia region, Italy. For the first cropping cycle (2005-2006) preliminary results showed that Trifolium spp. performed better than Medicago spp. Among the seven species, five were more suitable to the site’s conditions.  T. angustifolium and M. polymorpha gave the best results. T. angustifolium fixed 131.7 kg ha-1 year of nitrogen (15N isotope dilution method), produced 1976 kg ha-1 of seeds and 8.7 t ha-1 of dry matter (DM). M. radiata and M. rigidula were the less performing. During the second cropping cycle (2006-2007) results showed that Trifolium spp. self-established better than...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Pasture and forage crops; Vegetables.
Ano: 2008
URL: http://orgprints.org/13835/1/Driouech_Noureddin_legumes_ISOFAR_Revised01.pdf

Grundwasserschutz im Organischen Landbau: Untersaaten in Kartoffeln zur Minderung hoher Restnitratmengen im Boden
Provedor de dados: Organic Eprints
Autores: Haas, Guido.
Um nach Kartoffeln über Winter potentielle Nitratausträge zu mindern, wurden Untersaaten in Kartoffeln mehrjährig auf Praxisbetrieben getestet. In Anbauregionen mit regelmäßig frühem Krautfäulebefall sind Untersaaten in Kartoffeln anbauwürdig. Vor dem Reihenschluß der Kartoffeln mit dem letzten Häufelgang werden die geeigneten Arten Sonnenblume oder Mais in die Furchen oder später breitflächig Senf/Ölrettich ausgesät und wachsen nach dem Absterben des Kartoffelkrauts auf. Neben geringeren Nitratgehalten im Boden und einer effizienten Unterdrückung des Unkrautaufwuchses trägt die zusätzliche Biomassenbildung zur Versorgung des Bodens mit Humus bei und mindert in Hanglagen das Bodenerosionspotential. Mit blühenden Sonnenblumen oder Senf werden...
Tipo: Book
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Weed management.
Ano: 2003
URL: http://orgprints.org/13940/1/Report_KaUS02.pdf

Optimisation of nitrogen mineralisation from winter cover crops and utilisation by subsequent crops
Provedor de dados: Organic Eprints
Winter cover crops are integral to organic cropping systems; however, lack of knowledge concerning the fate of N following their incorporation presents a major barrier for efficient use of these crops in practice. Use of this N source is not only limiting to the production systems itself, but can also lead to loss of N via groundwater. This study will aim to quantitatively assess the fate of N from winter cover crops and investigate ways of optimising utilisation of this N source by subsequent organically-grown crops. The study will involve a mixture of field experimentation and computer modelling which will be carried out concurrently.  A series of field experiments will be conducted over 24 months on an organic site in order to quantitatively assess the...
Tipo: Project description
Palavras-chave: Nutrient turnover; Air and water emissions; Crop combinations and interactions.
Ano: 2023

FARMING PRACTICE EFFECTS ON NITROGEN FOOTPRINTS
Provedor de dados: Organic Eprints
Autores: Majidi, Ariel; Shade, Jessica; Leach, Allison; Galloway, James.
Organic practices in food production attempt to reduce the detrimental impacts of agricultural systems on the environment and human health. This study explores the effects such practices have on nitrogen (N) pollution, in comparison to conventional food production practices.  Virtual N factors were used for this comparison.  An organic virtual N factor of 4.6 was calculated for vegetables (37% lower than the conventional virtual N factor), 0.9 for starchy roots (-64%), 0.7 for grains (-86%) and 0.3 for beans (-53%).  The organic food N footprints were 43 – 53% less than the conventionally produced food N footprints. This study found that organic practices reduce N pollution with respect to conventional practices of food production.  Tracking the effects...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions; Biodiversity and ecosystem services; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/23271/1/23271%20Majdi_MM.pdf

Dyrkning i planterester giver mindre ukrudt
Provedor de dados: Organic Eprints
Autores: Rystedt, Lotte.
News from the Danish field trials of SoilVeg 2017
Tipo: Newspaper or magazine article
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage; Vegetables.
Ano: 2017
URL: http://orgprints.org/33593/1/Farmers%20magazine%20MASKINBLADET%2020171121_Dyrkning%20i%20planterester%20giver%20mindre%20ukrudt.pdf

Kamme - et alternativ til pløjning?
Provedor de dados: Organic Eprints
Autores: Christian Bugge, Henriksen.
På Landbohøjskolen arbejder vi på at udvikle et jordbearbejdningssystem, der er tænkt som et alternativ til pløjning. Det er baseret på kamme. Systemet er inspireret af Kemink Exact Jordbehandlingssystemet, som kendetegnes ved kamme, faste kørespor og dybe jordløsninger.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality; Soil tillage; Crop husbandry.
Ano: 2000
URL: http://orgprints.org/484/1/KAMME.pdf

Multispecies grasslands for crop productivity and carbon storage
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Mortensen, T.; Søegaard, K.
Organic grasslands have long been recognized for their provision of ecosystem functions and services and this may be further increased by inclusion of appropriate herb species. Inclusion of herb species in grasslands has in the present experiment shown to increase yield stability. Furthermore, the data presented here has indicated some potential of species known to have deeper and denser rooting systems to increase belowground biomass, an important asset for C sequestration in grasslands
Tipo: Conference paper, poster, etc.
Palavras-chave: Pasture and forage crops; Nutrient turnover; Air and water emissions.
Ano: 2013
URL: http://orgprints.org/24521/1/24521.pdf

SOIL FUNCTIONALITY AND EFFECTS OF POSSIBLE ERRORS IN SOIL MANAGEMENT DURING PRE-PLANTING AND VINEYARD CULTIVATION. EVIDENCES FROM THE RESOLVE PROJECT
Provedor de dados: Organic Eprints
Autores: Costantini, E.A.C.; Priori, S.; Giffard, B.; Fulchin, E.; Tardaguila, J.; Schroers, H.J.; Akca, E.; Tangolar, S.
The Resolve research project set up a multidisciplinary research work to evaluate the effects of possible errors in soil management during pre-planting and vineyard cultivation, leading to severe soil erosion. Different soil functionalities were considered, namely provision of grape yield and quality, water and nutrient supply, carbon sequestration, organic matter recycling, and soil biodiversity. The project involved 19 experimental organically farmed vineyards situated in Italy, France, Spain and Slovenia (wine grape), and in Turkey (table grape). The aim of the project was to understand the causes of soil malfunctioning and work out a proper strategy to restore soil fertility.
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Soil; Biodiversity and ecosystem services.
Ano: 2018
URL: http://orgprints.org/33457/1/7905-25843-2-PB.pdf

Managing for Soil Health on an Organic Farm - A Farmer's Perspective
Provedor de dados: Organic Eprints
Autores: Martens, Klaas.
This tool is a webinar. The presenter, Klaas Martens, is an organic farmer. He uses a diverse crop rotation to farm over 1,400 acres of organic corn, soybeans, small grains, a variety of peas, and cover crops. By adhering to one simple principle - every crop follows a suitable predecessor - Martens has improved soil health and function to cycle nutrients, increase water infiltration and availability, and eliminate both weed and disease pest problems. The presentation is focused on the concept of using plants to change the soil and how soil biology can perform the services that are expected from tillage. Relay cropping, or starting one crop before the previous crop is harvested, is also covered. The webinar is targeted both to newcomers and experienced...
Tipo: Practice tool
Palavras-chave: Soil quality; Soil biology; Nutrient turnover; Soil.
Ano: 2014
URL: http://orgprints.org/32603/1/SoilHealthweb.png

Biologisk jordstruktur
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun.
Hvordan partikler og porer i jorda er ordnet i forhold til hverandre bestemmer jordstrukturen. Leire, silt og sandkorn danner sammen med organisk materiale ulike typer aggregater og hulrom i jorda. Planterøtter og jordliv limer og vever dette sammen og danner store, synlige jordaggregater som vi kan se som rosinstore «gryn». Jord med mange slike aggregater sier vi har god «grynstruktur». Biologiske, kjemiske og fysiske prosesser er involvert. Denne fagartikkelen fokuserer på de biologiske prosessene.De abiotiske prosessene er viktigst når de minste aggregatene dannes, mens de biologiske prosessene betyr mer for dannelsen av de aller største.   Biologisk aktivitet, som planterøtter, sopphyfer, bakterier og meitemark i jorda danner både aggregater og porer,...
Tipo: Report
Palavras-chave: Soil quality; Farming Systems; Nutrient turnover; Biodiversity and ecosystem services; Environmental aspects; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/32349/1/Biologisk%20jordstrukur%20NORS%C3%98K%20faginfo%20m%20ISBN.pdf

Alternativen der Kleegrasnutzung in vieharmen und viehlosen Betrieben
Provedor de dados: Organic Eprints
Autores: Maaß, H.; Blumenstein, Benjamin; Bruns, Christian; Möller, Detlev.
Increasing number of stockless organic farms give reason to search for new forms of clover-grass (CG) utilization in order to maintain or increase soil fertility and productivity. A quantitative study was carried out among 93 organic farms to identify different forms of CG utilization and their assets and drawbacks on organic farms.  Different ways of CG transfer such as direct transfer (cut &amp; carry) and indirect transfer stockless farms. In addition, seven farms were interviewed about their experiences  with CG transfer practices. The farmers rate CG transfer mainly positive, since it may partially compensate the negative effects on soil fertility through the missing manure on stockless organic farms. As less than 0.2 LU/ha is found on more than 34%...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31859/1/Alternativen%20der%20Kleegrasnutzung%20in%20vieharmen%20und.pdf

Udledning af drivhusgas ved dyrkning af energiafgrøder - har det nogen betydning?
Provedor de dados: Organic Eprints
Autores: Carter, Mette S.; Hauggaard-Nielsen, Henrik; Thomsen, Sune T.; Heiske, Stefan; Jensen, Morten; Schmidt, Jens Ejbye; Johansen, Anders; Ambus, Per.
Udledning af drivhusgas ved dyrkning af energiafgrøder kan ophæve en betydelig del af den drivhusgasgevinst, der er forbundet med biogas.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2010
URL: http://orgprints.org/18330/4/18330.pdf

Soil P Status and Nitrogen Fixation on Organic Dairy Farms in Ontario and Nova Scotia
Provedor de dados: Organic Eprints
Autores: Main, Michael; Lynch, Derek; Ward, Amanda; Voroney, Paul; Schneider, Kim; Juurlink, Shelly.
Legumes are a key source of nitrogen (N) in organic production systems. However, there is evidence that reduced inputs may be leading to deficient soil phosphorus (P) on some organic dairy farms (Roberts et. al. 2008). This may affect crop performance and N fixation in forage legumes. This study aims to gauge the relationship between soil P dynamics in organic dairy systems and legume biological nitrogen fixation (BNF). The study has two main sub-projects:    1. A field survey of soil-test P and legume forage productivity and N fixation on dairy farms in Ontario and Nova Scotia, Canada.  2. Growth chamber and greenhouse studies examining:  a) The role of P nutrition in legume growth and N fixation, and  b) The P-supplying power of composts, struvite, and a...
Tipo: Report
Palavras-chave: Pasture and forage crops; Nutrient turnover; Farm nutrient management.
Ano: 2010
URL: http://orgprints.org/19551/1/OACC_Technical_Bulletin_2010%2D40_1.pdf

Developments in greenhouse gas emissions and net energy use in Danish agriculture - How to achieve substantial CO2 reductions?
Provedor de dados: Organic Eprints
Autores: Dalgaard, Tommy; Olesen, Jørgen E.; Petersen, B.M.; Petersen, Søren O.; Jørgensen, Uffe; Kristensen, Troels; Hutchings, Nicholas J.; Gyldenkerne, Steen; Hermansen, J.E.
Greenhouse gas (GHG) emissions from agriculture are a significant contributor to total Danish emissions. Consequently, much effort is currently given to the exploration of potential strategies to reduce agricultural   emissions. This paper presents results from a study estimating agricultural GHG emissions in the form of methane, nitrous oxide and carbon dioxide (including carbon sources and sinks, and the impact of energy consumption/bioenergy production) from Danish agriculture in the years 1990-2010. An analysis of possible measures to reduce the GHG emissions indicated that a 50-70% reduction of agricultural emissions by 2050 relative to 1990 is achievable, including mitigation measures in relation to the handling of manure and fertilisers,...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Air and water emissions; Buildings and machinery; Landscape and recreation; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/19044/4/19044.pdf

Ackerbausysteme im ökologischen Landbau: Untersuchungen zur Nmin-, N2O-N- und NH2-N-Dynamik sowie Rückschlüsse zur Anbau-Optimierung
Provedor de dados: Organic Eprints
Autores: Beckmann, Uta; Kolbe, Hartmut; Model, Annett; Russow, Rolf.
Die Entwicklung der Landwirtschaft war in den letzten Jahrzehnten gekennzeichnet durch einen beispiellosen Anstieg des Dünge- und Pflanzenschutzmitteleinsatzes sowie durch entsprechend starke Ertragssteigerungen. Die damit verbundenen nachteiligen Umweltwirkungen auf Wasser, Boden und Atmosphäre führten einerseits zur Suche nach Optimierungsstrategien und andererseits zu erhöhten Anstrengungen bei der Prüfung alternativer Bewirtschaftungsformen.  Zur Prüfung von Ackerbausystemen des ökologischen Landbaus wurden ab dem Jahr 1992 komplexe Dauerversuche angelegt. Es wurden Verfahren von viehlosen sowie von viehhaltenden Betrieben simuliert. In den Versuchen wurden außerdem eine stark unterschiedliche Düngungshöhe mit verschiedenen organischen Düngemitteln...
Tipo: Book
Palavras-chave: Composting and manuring; Production systems; Nutrient turnover; Soil quality; Air and water emissions.
Ano: 2002
URL: http://orgprints.org/802/1/kein%2DDokument.pdf

ORGANİK ÜRETİMDE FİĞ (Vicia sativa) İLE YAPILAN YEŞİL GÜBRELEMENİN BAZI SEBZE TÜRLERİNİN VERİMİNE VE TOPRAK ÖZELLİKLERİNE ETKİSİ
Provedor de dados: Organic Eprints
Autores: Duman, İbrahim; Kaya, Seçkin; Düzyaman, Eftal; Aksoy, Uygun; Albitar, Lina; Nazik, Ceren Ayşe; Bilen, Emre; Unal, Mehmet; Özsoy, Nazire.
Organik tarımda yeşil gübreleme toprak sağlığının korunması açısından vazgeçilmez bir uygulamadır. Çalışmada nadasa bırakma ve fiğ ile yapılan yeşil gübrelemenin sonrasında yetiştirilen sebze türleri (domates, kabak, biber ve patlıcan) üzerine olan etkisi ile uzun vadede toprak organik maddesi ve bazı bitki besin elementlerinin değişimi incelenmiştir. 2006-2010 yılları arasında yürütülen çalışmada, fiğ ile yapılan yeşil gübreleme ve nadas uygulamasının yanı sıra (CT) kompost çayı ve (CF) "Powhumus" ticari isimli organik gübreler alt faktör olarak yer almışlardır. Fiğ ile yapılan yeşil gübreleme biber verimini istatistiksel olarak arttırmıştır, CF gübreleme ise domates ve kabak verimi üzerinde etkili olmuştur. Buna karşılık, yeşil gübreleme domates ve kabak...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Nutrient turnover; Soil.
Ano: 2013
URL: http://orgprints.org/25257/1/Samsun%20%C4%B0%20DUMAN.pdf

Gemischtbetrieb mit Viehhaltung vs. viehloser Ökolandbau  3. Rotation im Dauerfeldversuch Gladbacherhof
Provedor de dados: Organic Eprints
Autores: Schulz, Franz; Brock, Christopher; Knebl, Lucas; Leithold, Günter.
An organic long-term field experiment with two factors has been carried out since 1998 at the experimental station Gladbacherhof, University of Gießen. The effects of  different farm types (with and without lifestock raising) combined with tillage treatments on plants, soil and environment have been investigated. This article  presents results on soil fertility and cash crop yields according to the farm system especially in the 2nd and 3rd rotation. All in all, the superiority of a management system  with cattle over stockless organic farming is demonstrated. The mixed farm type led to higher amounts of humus in the soil and to higher yields. Long term reduction of  humus in stockless farming is not acceptable. Therefore it is advisable that every crop...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Soil biology; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31955/1/Gemischtbetrieb%20mit%20Viehhaltung%20vs.%20viehloser%20%C3%96kolandbau.pdf

Recycling Phosphor Düngemittel für den Ökologischen Landbau
Provedor de dados: Organic Eprints
Autores: Wollmann, Iris; Möller, Kurt.
Phosphorus is an essential, non-substitutable nutrient for all living organisms, and global resources are getting depleted. Cycling of nutrients is a main principle in organic farming, which can make P fertilizers recycled from sewage sludge a suitable alternative. Several Recycling P fertilizers from sewage sludge processing, combined with two different Bioeffector products, were investigated for their P availability in pot experiments with red clover and maize. No significant effects could be shown due to Bioeffector applications. Promising effects of Recycling P-fertilizers could be shown concerning dry matter and plant P-uptake for both maize and red clover. Treatments with struvite reached values comparable with the superphosphate control while sewage...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Nutrient turnover; Crop husbandry.
Ano: 2015
URL: http://orgprints.org/27194/1/27194_wollmann.pdf

Optimizing a green manure-based row cropping system for organic cereal production
Provedor de dados: Organic Eprints
Autores: Phan, Hong TT; Thorup-Kristensen, Kristian.
A row cropping system with an increase of row distance to 24 cm increased the growth of undersown cover crops and allowed 1-2 passes of interow hoeing for weed control before sowing cover crops. The three-week delay sowing time was suitable for the growth of legume species. The new system significantly improved both grain yield and grain N content of the succeeding crop compared to the traditional  cropping system.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Biodiversity and ecosystem services; Policy environments and social economy; Denmark; Farm nutrient management; Europe.
Ano: 2018
URL: http://orgprints.org/33114/1/IFSA%202018-HONG%20PHAN.pdf

Nitrogen leaching from organic agriculture and conventional crop rotations (France)
Provedor de dados: Organic Eprints
Autores: Benoit, M.; Garnier, J.; Billen, G.; Mercier, B.; Azougui, A.
A great challenge to science is to elucidate how agriculture can feed the increasing world population without damaging the environment, while preserving other resources such as freshwater. In the Seine basin, characterised by intensive agriculture, most of surface and underground water is contaminated by nitrate. Conventional agriculture has regularly increased the use of industrial fertilisers since the WWII, leading to high nitrogen leaching, as shown by lysimeters or suction cup measurements. Such measurements are very scarce for other agricultural systems such as organic farming (Hansen et al. 2000; Haas et al. 2002; Mondelaers et al. 2009). The goal of our study is to investigate nitrogen leaching from organic agriculture, taking into account complete...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2013
URL: http://orgprints.org/24518/1/24518.pdf

Direkte Bestimmung von organischem Kohlenstoff in Böden –  ein Methodenvergleich bei verschiedenen Analysetemperaturen
Provedor de dados: Organic Eprints
Autores: Nätscher, L.
The analysis of organic carbon in soils is a pre-condition for the understanding of Cstatus and C-balances. The widely used combustion method of total C, followed by the differentiation in an organic and inorganic fraction is compared with the direct determination of organic C. The direct analysis is precise, accurate and is suitable for Canalysis in calcareous and non-calcareous soils.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31540/1/Effect%20of%20Seeding%20density%20on%20Plant%20Interactions%20in%20Cereal-%20bereits%20hochgeladen.pdf

Levende frisk jord - en sikkerhet for framtidig og trygg matproduksjon
Provedor de dados: Organic Eprints
Autores: Pommeresche, Reidun.
Jordas funksjoner, matjorda som økosystem, jordlivet som produksjonsfaktor
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Soil quality; Farming Systems; Soil biology; Nutrient turnover; Farm nutrient management.
Ano: 2017

Organisk kvælstof kan også udvaskes
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
Når vi taler om udvaskning af kvælstof mener vi i reglen nitratudvaskning til én meters dybde. Spørgsmålet er imidlertid om der også udvaskes organisk bundet kvælstof, og hvilken effekt det organiske stof eventuelt har på udvaskningens størrelse og på kvælstoffets videre skæbne i jordlagene under en meters dybde. I jorden findes en stor pulje af organisk stof, som ved mikrobiel aktivitet efterhånden nedbrydes til mindre organiske kulstof- og kvælstofforbindelser, der kan frigives til jordvæsken med potentiel risiko/mulighed for at blive udvasket. Nye forsøg har vist at der udvaskes organisk bundet kvælstof (org. N) og kulstof (org. C) i ikke helt ubetydelige mængder, og at udvaskningen af dette bl.a. afhænger af afgrøder og dyrkningsmetode.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/4195/1/4195.pdf

Nitrate leaching and spring wheat bread making quality following cultivation of grasslands of different composition, age and management
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Pedersen, L.; Jørgensen, J.R.
The influence of sward botanical composition and ley age on grassland residual effects, quality of spring wheat and subsequent nitrate leaching was investigated. Grazed grasslands of different age (1, 2 and 8 production years) and composition (unfertilised grass-clover and fertilised perennial ryegrass) were ploughed and followed by spring wheat and spring barley. For reference, an adjacent field without grassland history but with the same crop sequence in 2002-2003 was treated with increasing quantities of N fertiliser. Yields and N uptake of spring wheat following grasslands always exceeded those of the reference plots with a history of cereal production. The nitrogen fertiliser replacement values of grass-clover and ryegrass were 59-100 and 72-121 kg...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/10042/1/10042.pdf

Manure fertilization for soil organic matter maintenance and its effects upon crops and the environment, evaluated in a long-term trial
Provedor de dados: Organic Eprints
Autores: Raupp, Dr Joachim.
The effects upon soil organic matter and crop yield of applying farmyard manure, both with and without biodynamic preparations, as compared to treatments receiving mineral fertilizer (and straw) have been studied in a field trial starting in 1980. The site has a sandy orthic luvisol, 590 mm precipitation per year and  9.5̊ C annual mean temperature. Since 1985/86, crop rotation is red clover, spring wheat, potatoes and winter rye. Soil organic matter (SOM) content in the topsoil has been found to be higher with manure than with mineral fertilization. The highest SOM content of 1.00 % Corg has been observed in the treatment with biodynamic preparations. Increasing applications gave higher SOM contents only with manure, but not with mineral fertilization....
Tipo: Book chapter
Palavras-chave: Nutrient turnover; Soil biology; Composting and manuring.
Ano: 2001
URL: http://orgprints.org/635/1/0851994652Ch4.10.pdf

Sicherung des Ertragspotentials von Luzerne-Kleegrasbeständen durch Verbesserung des aktuellen Schwefelversorgungszustandes ökologisch bewirtschafteter Flächen - Situation und Bedeutung unter Praxisbedingungen
Provedor de dados: Organic Eprints
In den geplanten Arbeiten soll der Status Quo der Schwefelversorgung auf Betrieben des Ökologischen Landbaus erfasst werden. Es soll untersucht werden, in wieweit sich die momentane Schwefelversorgung negativ auf die Bodenfruchtbarkeit der Standorte und somit auf den Ertrag und die Qualität der Kulturen auswirkt.   Da die Leguminosen zum einen über ihren N-Eintrag in die Fruchtfolge eine außerordentliche Relevanz im ökologischen Landbau haben, und zum anderen besonders schwefelbedürftig sind, sollen auf den zuvor hinsichtlich der Schwefelversorgung charakterisierten Standorten eine Schwefeldüngung diesen Kulturen durchgeführt werden. Die Auswirkungen sowohl hinsichtlich Qualität als auch Ertrag sollen erfasst werden, um somit die limitierende Wirkung der...
Tipo: Project description
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2023

Long Term Field Experiments in Organic Farming
Provedor de dados: Organic Eprints
A number of cultivation methods in Organic Agriculture, such as diversified crop rotations and the application of organic manure, have a long-term effect, especially on the physical, biological and microbial parameters of soils. It often takes decades for the quantity and quality of soil organic matter to reach a new dynamic equilibrium. Long-term experiments are thus essential to investigate the effects of crop rotations and organic fertilization on soils and, as a result, on crops. The continuation of long-term experiments is therefore of particular importance to Organic Agriculture.    This volume contains a selection of 12 long-term experiments conducted under different site conditions in Germany, the USA, Italy, Denmark, Switzerland, Austria and...
Tipo: Book
Palavras-chave: Research methodology and philosophy; Nutrient turnover; Soil quality; Soil tillage.
Ano: 2006
URL: http://orgprints.org/8554/1/raupp%2Detal%2D2006%2Dlong%2Dterm%2Dcontent.pdf

Guide sur les techniques de restauration du sol en viticulture
Provedor de dados: Organic Eprints
Autores: Fulchin, E.; Priori, S.; D'Avino, L.
Guidelines for soil functionality restoration in degraded areas of vineyard (French language)
Tipo: Teaching resource
Palavras-chave: Soil quality; Crop combinations and interactions; Soil biology; Composting and manuring; Nutrient turnover; Soil tillage; Soil; Biodiversity and ecosystem services; Viticulture.
Ano: 2018
URL: http://orgprints.org/33836/1/Guidelines_Resolve_soil_restoration_techniques_FRENCH.pdf

SUSTAINABLE CULTIVATION OF OLIVE TREES BY REUSING OLIVE MILL WASTES AFTER EFFECTIVE CO-COMPOSTING TREATMENT PROCESSES
Provedor de dados: Organic Eprints
Autores: Vlyssides, Apostolos; Mai, Sofia; Barampouti, Elli Maria; Van der Smissen, Nicollette.
All olives’ treatment processes (olives, olive oil, olive wooden residue) produce liquid and solid wastes, which are considered toxic. The treatment of these wastes by using conventional technologies (aerobic/anaerobic biological treatment, incineration, gasification ect) proved to be neither technically nor cost effective. This fact treats the olive oil production by complete cease due to the serious environmental problems caused. The proposed technology includes the detoxification of wastewater by Fenton oxidation reactions and following their utilization by biological treatment methods. The latter is achieved by the implementation of anaerobic digestion process on the oxidized wastewater and the consequent methane production and by co-composting the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2014
URL: http://orgprints.org/23721/1/23721_MM.pdf

Fertilizer value and nitrogen transfer efficiencies with clover-grass ley biomass based fertilizers
Provedor de dados: Organic Eprints
Autores: Benke, Anna Pia; Rieps, Ann; Wollmann, Iris; Petrova, Ioana; Zikeli, Sabine; Möller, Kurt.
In temperate regions, legume-based green manures are a key element of organic rotations.  However, specialized farms lack sufficient mobile organic fertilizers. To gain a better understanding of the N flows and the nitrogen (N) and phosphorus (P) fertilizer value of different clover-grass-based fertilizers (biogas digestate, compost, silage and fresh clover-grass obtained from clover grass ley biomass), we assessed their fertilizer value. Nitrogen and P offtake by the ryegrass was used to assess the shortterm effects. The data were completed using model calculations to assess the field-to-field N-transfer efficiencies and the overall N-transfer efficiencies.  The greatest plant N offtake was achieved with digestates (64%) and the lowest from the compost...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32675/1/Benke2017-Fertilizer%20value%20and%20nitrogen%20transfer%20efficiencies%20with%20clover-grass%20ley%20biomass%20based%20fertilizers.pdf

Växtnäringens flöde genom jordbruk och samhälle – vägar att sluta kretsloppen
Provedor de dados: Organic Eprints
Autores: Granstedt, Artur.
I dag går större delen av den växtnäring som tillförs jordbruket förlorat till luft och vatten eller binds i marken. Detta innebär en kostnad för jordbruket och leder samtidigt till skador på den omgivande miljön. Jordbruket bedöms svara för över 40 procent av kväveläckaget till Östersjön. Kväveförlusterna till luften i form av ammoniak bidrar också till övergödningen och det sura nedfallet. Målsättningen att halvera kväveförlusterna från jordbruket har inte uppnåtts. Trots att det är endast en liten del av fosforöverskottet i jordbruket som läcker ut i vattendragen har även detta skadliga konsekvenser för miljön i form av övergödning av sjöar, vattendrag och hav.    I föreliggande studie beskrivs växtnäringsflödena i jordbruket och orsakerna till dagens...
Tipo: Report
Palavras-chave: Nutrient turnover.
Ano: 1999
URL: http://orgprints.org/298/1/ekolantbr29.pdf

Le bio améliore la fertilité du sol et la biodiversité
Provedor de dados: Organic Eprints
Autores: Fliessbach, Andreas; Mäder, Paul; Dubois, David; Pfiffner, Lukas; Gunst, Lucie.
Résultats de 21 ans d'essai DOC (Dossier N° 1)  Dans un langage accessible au plus grand nombre, ce dossier présente les résultats marquants de 21 années d'essai DOC. Cette expérience de terrain offre une comparaison à long terme des méthodes de culture biodynamique (D), bio-organique (O) et conventionnelle (C). Font l'objet d'une mise en évidence et d'un commentaire, les rendements, les exportations et prélèvements d'éléments fertilisants, les effets sur la vie, la structure et la biodiversité du sol.
Tipo: Book
Palavras-chave: Soil quality; Nutrient turnover; Soil tillage.
Ano: 2001
URL: http://orgprints.org/25234/1/1190-dok.pdf

Symbiotic nitrogen fixation and N-transfer in a   grass-white clover mixture
Provedor de dados: Organic Eprints
Autores: Vinther, Finn P.
Symbiotic N2 fixation (SNF) and transfer of fixed N from clover to grass in a grass-white clover mixture was measured during two years using 15N isotope dilution techniques. White clover derived from 87 to 99% of its N from the atmosphere. The total SNF ranged from 150 to 277 kg N ha-1 yr-1, which corresponded to 34-45 mg N fixed per gram of white clover dry weight. The transfer of fixed N from clover to grass corresponded to approximately 10 kg N ha-1 yr-1.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil quality; Soil biology; Pasture and forage crops.
Ano: 2000
URL: http://orgprints.org/180/1/N%2Dfix_poster_Aalborg_2000.pdf

Forms of Inorganic Phosphorus in Soil under  Different Long Term Soil Tillage Systems and  winter Crops
Provedor de dados: Organic Eprints
Autores: Tiecher, T.; Santos, D.R.; Kaminski, J.; Calegari, A.
The cultivation of crops with different capacity of P uptake and use under long-term soil tillage systems can affect the distribution of P cycling and inorganic forms in the soil, as a result of higher or lower use  efficiency of P applied in fertilizers. The purpose of this study was to evaluate the effect of long-term cultivation of different winter species under tillage systems on the distribution of inorganic P forms in the soil. In 1986, the experiment was initiated with six winter crops (blue lupin, hairy vetch, oat, oilseed radish, wheat and fallow) on a Rhodic Hapludox in southwestern Paraná, under no-tillage (NT) and conventional tillage (CT ). The application of phosphate fertilizer in NT rows increased inorganic P in the labile and moderately...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil tillage.
Ano: 2012
URL: http://orgprints.org/29914/1/Tiecher.pdf

Einfluss von Zwischenfrüchten auf Lachgasverluste und  Nitratauswaschung im ökologischen Marktfruchtbau in Abhängigkeit von der Vorfrucht
Provedor de dados: Organic Eprints
Autores: Böldt, M.; Loges, Ralf; Kluss, Cristof; Taube, Friedhelm.
All-arable organic farming systems, especially when they are working without organic fertilizer, are often in challenge with their nutrient management to fulfill the requirements of crops. In this context one of the main issues is to mitigate nutrient losses. Here the use of catch crops may one strategy to counteract against this. We hypothesized that under the climate conditions of north-west Germany winter hard catch crops are more suitable to reduce nitrogen (N) losses than catch crops killed by frost, here especially with cereals or legumes as previous crop. In a field experiment in 2015/16 we tested 3 different catch crops (grown in pure stand and in mixture with legumes) after peas and triticale for their nitrogen loss paths over the winter period....
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover; Air and water emissions.
Ano: 2017
URL: http://orgprints.org/31876/1/Einfluss%20von%20Zwischenfr%C3%BCchten%20auf%20Lachgasverluste%20und.pdf

Production of biomass and bioenergy in organic agriculture and its consequences for soil quality, environment, biodiversity and socio-economy
Provedor de dados: Organic Eprints
Autores: Johansen, A.; Hauggaard-Nielsen, H.; Ambus, P.; Dalgaard, T.; Jørgensen, U.; Nielsen, A.M.; Nielsen, L.H.; Olesen, J.E.; Roepstorff, A.; Skytte, K.; Smith, J.E.; Thomsen, A.B.; Carter, M.S.; Jensen, E.S.
Production of bioenergy in organic agriculture may be implemented in the future to reduce the reliance on non-renewable fossil fuels and minimize greenhouse gas (GHG) emissions. Therefore it is important to assess the potential effect this may have on soil quality and biological parameters. This project aims at designing and evaluate a combined concept for biomass and bio-energy production in OA, while considering soil bio-geo-chemical cycling of plant nutrients and biodiversity of the soil microbiota.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Soil biology; Biodiversity and ecosystem services; Soil quality; Air and water emissions; Farm economics; Farm nutrient management; Quality and evaluation of inputs.
Ano: 2008
URL: http://orgprints.org/15157/1/15157.pdf

Integrated nitrogen input systems in Denmark
Provedor de dados: Organic Eprints
Autores: Olesen, J.E.; Sørensen, P.; Thomsen, I.K.; Eriksen, J.; Thomsen, A.G.; Berntsen, J.
Cycling of N in agriculture through the use of mineral fertilizers, manures and N-fixing crops gives rise to many forms of N emissions to the environment, including nitrate (NO3) leaching, ammonia (NH3) volatilization and nitrous oxide (N2O) emissions, resulting in ground water pollution, eutrophication of surface waters, soil acidification and contributions to global warming. The high rates of N input in intensive North European agricultural systems have given rise to high loss rates, and the focus in Danish agriculture during the past two decades has been on increasing the N use efficiency with the aim of reducing losses. The N use efficiency at the system level can be increased by improved handling of manure, targeted application of fertilizers and...
Tipo: Book chapter
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/4668/3/4668.pdf

Nyt fra forskningen i plantebaseret gødning, efterafgrøder og dyrkningssystemer i øko-grønsager
Provedor de dados: Organic Eprints
Autores: Kristensen, Hanne Lakkenborg.
Præsentation af DoubleCrop projektet og perspektiverne for plantebaseret gødning, og bæredygtig intensivering af dyrkningssystemer i øko-grønsager
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Crop combinations and interactions; Composting and manuring; Nutrient turnover; Soil tillage; Air and water emissions; Vegetables; Root crops.
Ano: 2019
URL: http://orgprints.org/35464/1/%C3%85bent%20avler%20m%C3%B8de%20Velkommen_SureVeg%20hesteb%C3%B8nner_DoubleC%20projektm%C3%B8de_5marts2019_hlk.pdf

Ytkaraktärisering av fosforhalter på markpartiklar med fotoelektronspektroskopi (ESCA) av jordar i olika jordbrukssystem
Provedor de dados: Organic Eprints
Växternas försörjning av fosfor (P) medför speciella problem vid ekologisk odling där lättlöslig handelsgödselfosfor ej tillförs. För att bättre utnyttja markens P-reserver och minska behovet av tillförd P behövs ökad kunskap om fosforns förekomstformer i olika jordar. En ytspektroskopisk metod behövs, eftersom de nuvarande metoderna för uppskattning av växttillgänglig P bygger på kemisk våtextraktion av bulkprover. Nästan alla reaktioner med P i marken sker dock på partikelytorna under helt andra vätskeregimer och jonkoncentrationer. Den mest generella och kvantitativt användbara ytspektroskopiska metoden är fotoelektronspektroskopi för kemisk analys (ESCA), som utvecklats under de senaste tio åren och nu har en detektionsgräns som medger analyser av...
Tipo: Project description
Palavras-chave: Nutrient turnover; Soil quality.
Ano: 2023

Row spacing and catch crop establishment in organic arable systems: a way to increase biological N fixation
Provedor de dados: Organic Eprints
Autores: De Notaris, Chiara; Sørensen, Peter; Rasmussen, Jim; Olesen, Jørgen E.
Increasing the row space of spring wheat from 12 to 24 cm, but maintaining the same seeding density, didn´t decrease its yield. On the other hand, it positively influenced the growth of the undersown catch crop, a mixture of red clover, white clover, rye grass and chicory.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Weed management; Farm nutrient management.
Ano: 2016
URL: http://orgprints.org/30876/1/Session%203-57-58.pdf

Can living mulches in intercropping systems reduce the potential nitrate leaching? Studies of organic cauliflower (Brassica oleracea L. var. botrytis) and leek (Allium porrum L.) production across European conditions
Provedor de dados: Organic Eprints
Autores: Xie, Yue; Tittarelli, Fabio; von Fragstein, Peter; Bavec, Martina; Canali, Stefano; Kristensen, Hanne Lakkenborg.
The effect of introduction strategy for living mulches (LMs) to reduce the potential nitrate leaching was investigated when grown with vegetables with high nitrogen (N) demand and low use efficiency in four European countries: Italy, Slovenia, Germany and Denmark over 2 yr. The plant N uptake and soil nitrate N content at harvest, in the autumn, and in the following spring were measured below open-pollinated and hybrid cultivars of cauliflower and leek crops. The cultivars performed differently over the 2 yr. In Italy and Slovenia, when LM of burr medic or white clover was broad sown (addition design ADD) at the same time as crop transplanting, the N uptake of crops was hampered without increasing the total aboveground N accumulation. Delaying LM sowing by...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover; Vegetables; Environmental aspects.
Ano: 2017
URL: http://orgprints.org/32018/1/Xie%20et%20al%20RAFS%202017.pdf

Effect of Accelerated Compost on Soil Physical and  Chemical Properties of an Alfisol
Provedor de dados: Organic Eprints
Autores: AyanfeOluwa, O. E; AdeOluwa, O. O.; Oshunsanya, S. O.; Aduramigba-Modupe, V. O.
Accelerated compost (AC) is a newly developed commercial compost from market organic wastes and animal manure with composting accelerated within twenty one (21) days using a specific microorganism. However, information on effect of AC on soil properties is scarce. Therefore the field experiment was conducted in Ibadan to assess the effect of an AC on the properties of an Alfisol using maize (Zea mays L.) as a test crop. The experiment was laid out in a randomized complete block design with three replications. The AC treatments rates were 60, 90, 120, 150 and 180 kg N/ha; while NPK 15-15-15 mineral fertilizer and conventional compost (CC) at 60 kg N/ha and an absolute control (no soil additive) were used as checks. Data collected on post cropping soil...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/28896/1/AyanfeOluwa%20et%20al%20full%20paper%20edited.docx

A review of farm-scale nutrient budgets for organic farms as a tool for management of soil fertility
Provedor de dados: Organic Eprints
Autores: Watson, C.A.; Bengtsson, H.; Ebbesvik, M.; Loes, A-K.; Myrbeck, A.; Salomon, E.; Schroder, J.; Stockdale, E.A.
On organic farms, where the importation of materials to build/maintain soil fertility is restricted, it is important that a balance between inputs and outputs of nutrients is achieved to ensure both short-term productivity and long-term sustainability. This paper considers different approaches to nutrient budgeting on organic farms and evaluates the sources of bias in the measurements and/or estimates of the nutrient inputs and outputs. The paper collates 88 nutrient budgets compiled at the farm scale in 9 temperate countries. All the nitrogen (N) budgets showed an N surplus (average 83.2 kg N ha-1 year-1). The efficiency of N use, defined as outputs/inputs, was highest (0.9) and lowest (0.2) in arable and beef systems respectively. The phosphorus (P) and...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil quality.
Ano: 2002
URL: http://orgprints.org/8061/2/Watson_orgrpints_8061.pdf

Kun lille N-effekt af jordløsning i vårbyg
Provedor de dados: Organic Eprints
Autores: Thomsen, Ingrid Kaag.
Dyrket jord i Danmark indeholder 6-12 t N/ha i de øverste 50 cm. Hvert år mineraliseres en lille del af dette til plantetilgængeligt kvælstof, men langt hovedparten forbliver på organisk form, og er således ikke tilgængeligt for planteoptagelse. Når der kun mineraliseres lidt af jordens totale kvælstofindhold skyldes det dels at kvælstoffet er på en form der kun langsomt omsættes dels at noget organisk bundet kvælstof er placeret på en måde, der vanskeliggør omsætning, altså er fysisk beskyttet. Noget af det fysisk beskyttede kvælstof kan være placeret i aggregater, hvor der kun er begrænset tilgang af vand og luft, som er nødvendigt i forbindelse med omsætningen. Hvis sådanne aggregater brydes, kan forholdene for det organisk bundne kvælstof påvirkes,...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/1723/1/Landsbladet_2002.doc

Persistenz bodenphysikalischer Wirkungen perennierender  Futterpflanzen mit Pfahlwurzelsystemen
Provedor de dados: Organic Eprints
Autores: Kautz, Timo; Urbanska, D.; Athmann, Miriam; Dahn, C.; Täufer, Frank; Köpke, Ulrich.
Taprooted crops create large sized biopores in the subsoil which in turn facilitate root growth of following crops. To date it was unclear, over which periods of time biopores  created by taproots remain stable. This study based on a long-term field experiment provides evidence that soil physical effects of taprooted chicory are persistent even 6 years after cultivation. Moreover, repeated cultivation of taprooted crops probably has cumulative beneficial effects on soil structure.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover; Crop husbandry.
Ano: 2017
URL: http://orgprints.org/31555/1/Persistenz%20bodenphysikalischer%20Wirkungen%20perennierender.pdf

EFFECTS OF REDUCED TILLAGE, FERTILISATION AND BIODYNAMIC PREPARATIONS ON CROP YIELD, WEED INFESTATION AND THE OCCURRENCE OF TOXIGENIC FUSARIA
Provedor de dados: Organic Eprints
Autores: Berner, Alfred; Frei, Robert; Dierauer, Hans-Ulrich; Vogelgsang, Susanne; Mäder, Paul.
In a recently started long-term field trial (2002-2011), located in Frick (1000 mm mean annual precipi-tation) near Basle (Switzerland), the effect of reduced tillage on crop yield, weed infestation, and oc-currence of toxigenic fusaria was studied on a heavy soil (45% clay) in a crop rotation under organic farming conditions. Here, we present results of the first two experimental years (2003-2004), which are considered as the conversion period. Wheat yield was 16% higher (p &lt; 0.001) in ploughed plots than in the plots with reduced tillage (chisel and rotary harrow). In the following year, sunflower yield was enhanced by 5% (p = 0.06) in reduced tilled plots. Reduced tilled plots manifested a higher weed infestation, in particular with Convolvulus...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Weed management; Soil tillage.
Ano: 2005
URL: http://orgprints.org/4216/1/berner_etal_2005_effects_reduced_tillage_final.doc

From N2 fixation to N2O emission in a grass-clover pasture
Provedor de dados: Organic Eprints
Autores: Thyme, Mette; Ambus, Per.
In organic dairy farming, a major N input to the plant-soil system comes from biological N2 fixation by pasture legumes, but knowledge is sparse on how much of the fixed N2 is lost from the pastures as N2O. Nitrifying and denitrifying bacteria are the main contributors to the N2O production in soils.     Currently, no contribution from biological N2 fixation in legume pastures is included in the national N2O inventories, partly because of uncertainties in quantifying the N2 fixation in the pastures (Mosier et al., 1998). According to the guidelines issued by The Intergovernmental Panel on Climate Change (IPCC), inventories for N2O emissions from agricultural soils should be based on the assumption that 1.25 % of added N is emitted as N2O (IPCC, 1997). The...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Pasture and forage crops; Air and water emissions.
Ano: 2003
URL: http://orgprints.org/1464/1/Poster_Mette_Thyme.pdf

Nitrate leaching following cultivation of contrasting temporary grassland.
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Søegaard, K.
The N-surplus in grazed grassland is much higher than in cut grassland. Therefore, the residual effects of three years of temporary grassland on nitrate leaching in the following cereal crop were determined. Grassland managements were either cut leys or grazing with dairy cows in both pure grass and grass-clover mixtures. The cows were fed two levels of N in the supplements. Grassland management had little effect on the subsequent nitrate leaching, which ranged from 6 to 36 kg N ha-1, even though the surplus after three years of grassland ranged from 36 to 984 kg N ha-1. This indicates that substantial losses occurred during the grassland period. Application of fertiliser-N to the cereals had a much larger effect on nitrate leaching. It is concluded that...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2000
URL: http://orgprints.org/149/1/437.ppt

Lille effekt af fangafgrøder
Provedor de dados: Organic Eprints
Autores: Jensen, Lars Stoumann.
Økologisk produktion af salgsafgrøder uden tilførsel af fosfor (P) eller kalium (K) vil med tiden kunne begrænses af næringsstofmangel, ikke mindst i afgrødernes etableringsfase, hvor de har et lille rodsystem. Hvor lang tid der går før problemet opstår, afhænger blandt andet af jordens næringsstof status ved omlægning til økologi. Vi ved at efterafgøder kan være et godt redskab til at flytte rundt på tilgængeligt kvælstof (N) i et økologisk sædskifte, men gælder det også P og K når jordens status bliver lav? Dette har vi undersøgt i FØJO-II projektet VegCatch med titlen "Økologiske grønsager og efterafgrøder".
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Farm nutrient management.
Ano: 2005
URL: http://orgprints.org/6162/1/6162.pdf

Environmentally benign Fe chelates in plant nutrition
Provedor de dados: Organic Eprints
Autores: Ylivainio, Kari.
The low solubility of iron (Fe) depresses plant growth in calcareous soils. In order to improve Fe availability, calcareous soils are treated with synthetic ligands, such as ethylenediaminetetraacetic acid (EDTA) and ethylenediimonobis(2-hydroxyphenyl)acetic acid (EDDHA). However, high expenses may hinder their use (EDDHA), and the recalcitrance of EDTA against biodegradation may increase the potential of cadmium (Cd) and lead (Pb) leaching. This study evaluated the ability of biodegradable ligands, i.e. different stereoisomers of ethylenediaminedisuccinic acid (EDDS), to provide Fe for lettuce (Lactuca sativa L.) and ryegrass (Lolium perenne cv. Prego), their effects on uptake of other elements and solubility in soils and their subsequent effects on the...
Tipo: Thesis
Palavras-chave: Nutrient turnover.
Ano: 2009
URL: http://orgprints.org/16610/1/mtttiede5.pdf

Svovl i økologiske sædskifter?
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
I det seneste årti har der været stigende opmærksomhed på gødskning med svovl i det konventionelle landbrug. Tidligere, hvor nedfaldet af svovl fra atmosfæren var op imod 40 kg pr. ha, var det tilstrækkeligt til at dække planternes behov. En reduktion af forureningen fra afbrænding af olie og kul har sænket nedfaldet til under 10 kg pr. ha, og planterne har derfor i dag et reelt behov for supplerende tilførsel af svovl. En tilstrækkelig forsyning med svovl er vigtig, ikke alene for udbyttet, men også for kvaliteten af foder og brødhvede. Det har desuden vist sig, at svovl har betydning for planternes N-udnyttelse. Disse forhold gælder naturligvis også under økologiske betingelser, hvor behovet dog er mindre pga. et lavere udbytteniveau. Især bedrifter uden...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/3180/1/Dokument.doc

Soil quality of organically managed citrus orchards in the Mediterranean area.
Provedor de dados: Organic Eprints
Autores: Canali, Stefano.
Soil quality can be defined as the capacity of a soil to function, whilst maintaining the environmental quality and promoting plant and animal health. It also refers to the capability of soil to function at present and in the future for an indefinite period of time. Soil quality is a basic concept in the sustainable management of any agricultural system aimed at producing, avoiding or reducing negative effects on the environment, preserving resources and saving energy on a medium- or long-term basis and its assessment might be considered a means for the evaluation of the environmental sustainability of agricultural systems. A study was conducted with the aim of evaluating the contribution of the introduction of organic farming system to the environmental...
Tipo: Book chapter
Palavras-chave: Nutrient turnover; Quality and evaluation of inputs; Farm nutrient management; Soil quality.
Ano: 2003
URL: http://orgprints.org/7836/1/Soil_quality_of_organically_managed_citrus_orchards_in_the%E2%80%A6.pdf

Nitrogen fertilizer replacement value of digestates  from three green manures
Provedor de dados: Organic Eprints
Autores: De Notaris, C.; Sørensen, P.; Møller, H.B.; Wahid, R.; Eriksen, J.
Green manure mixtures including legumes and forbs can help to increase N availability in organic arable systems. Anaerobic digestion of green manures may provide ammonium rich digestate, which can be redistributed as fertilizer. The aim of this study was to investigate the effect of plant species composition, cutting strategy and anaerobic digestion on the N fertilizer replacement value (NFRV) of different green manures. Digestates obtained from silages of pure stand lucerne (four cuts/year) and a mixture including lucerne, grass and forbs (two or four cuts/year) were used to fertilize winter wheat (surface banding) and spring barley (injection). In general, NFRV was 46–173% higher in spring barley than winter wheat, due to the different application method...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/34971/1/10.1007_s10705-018-9951-5.pdf

Untersaaten in Kartoffeln: Sonnenblume, Mais oder Gelbsenf
Provedor de dados: Organic Eprints
Autores: Haas, Guido.
Einleitung:  Nach der Ernte organisch angebauter Kartoffeln wurden vor Winter Nitratgehalte um 30 kg N/ha, aber auch bis über 100 kg N/ha in einer Bodentiefe von 0–90 cm gemessen. Auf den Nitratgehalt im Boden nach der Rodung kann zu verschiedenen Anbauphasen Einfluß genommen werden (Tab. 1). Um hohe Nitratgehalte zur und nach der Ernte im Boden organisch bewirtschafteter Kartoffeln zu mindern, wurden in den Jahren 1997 und 1998 verschiedene Arten von Untersaaten in Feldversuchen auf dem Versuchsbetrieb Wiesengut sowie in den Jahren 1999 und 2000 zusätzlich auf vier weiteren Leitbetrieben im Rheinland untersucht.    Fazit und Zusatznutzen  Primäres Ziel ist ein für Kartoffeln optimales Anbauverfahren. Untersaaten sollen als Zusatzmaßnahme vor allem die...
Tipo: Report chapter
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Root crops; Air and water emissions.
Ano: 2003
URL: http://orgprints.org/2322/1/2322%2Dhaas%2Dg%2D2003%2Dleitbetriebe%2Dkartoffel%2Duntersaat.pdf

Kvælstofmineralisering efter jordløsning i vinterhvede
Provedor de dados: Organic Eprints
Autores: Thomsen, Senior scientist Ingrid Kaag.
Jordløsning i vækstsæsonen kan medvirke til, at organisk stof placeret i aggregater frigøres og omsættes. Derved kan der ske en mineralisering af kvælstof, således at mængden af plantetilgængeligt kvælstof i jorden øges. Dette er baggrunden for undersøgelser vedr. anvendelse af jordløsning som styringsredskab til at skabe bedre overensstemmelse mellem kvælstofmineralisering og planternes behov for kvælstof.    Her præsenteres resultater fra et forsøg med jordløsning i vinterhvede. Hveden var sået på dobbelt rækkeafstand på parceller, hvor der siden 1987 er blevet opbygget forskellige niveauer af organisk stof i jorden ved tilførsler af gylle og halm samt dyrkning af efterafgrøder. Jordløsningen blev foretaget i maj med enten en radrenser, rækkefræser eller...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/1416/1/abenhus2003.ppt

Gülle besser verstehen – Ergebnisse des Gülleuntersuchungsprojektes 2017
Provedor de dados: Organic Eprints
Autores: Angeringer, Wolfgang; Weber, Christina; Freudenberger, Gertrude.
Flüssige Wirtschaftsdünger, also alle Formen von Gülle und Jauche, geraten heute gesellschaftlich immer mehr in Kritik. Aus landwirtschaftlicher Sicht steht die verlustarme Ausbringung, vor allem in Hinblick auf gasförmige Stickstoffverluste im Vordergrund. Die Bevölkerung nimmt diese Ausgasungen, vor allem Ammoniak und Schwefelverbindungen als Geruchsbelästigung wahr, wodurch es immer häuﬁ ger zu Auseinandersetzungen kommt. Entsprechend groß war das Interesse der Landwirte, am Gülleprojekt der LK Steiermark teilzunehmen. Die Untersuchung beinhaltete Nährstoffgehalte, Trockenmasse und pH-Wert im NIRS-Schnelltestverfahren. Ziel war es, aus der Fülle an Proben zusammen mit Hintergrundinformationen über die Güllebehandlungen und Systeme auf den Betrieben,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Dairy cattle; Beef cattle; Nutrient turnover; Air and water emissions; Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/32344/1/2_Angeringer20171017.pdf

Long-term amendment of urban and animal wastes equivalent to more than 100 years of application had minimal effect on plant uptake of potentially toxic elements
Provedor de dados: Organic Eprints
Autores: López-Rayo, Sandra; Laursen, Kristian H.; Lekfeldt, Jonas D.S.; Grazie, Fabio D.; Magid, Jakob.
Urban waste products such as sewage sludge and organic household waste compost have a potential as fertilizers in agriculture, but evidence from historical field experiments performed in England and Germany with sewage sludge as fertilizer pointed towards negative effects of sludge-derived heavy metal accumulation on soil microbiota and plants. However, sewage sludge has improved in quality during the last half century and source separation of organic household waste has been shown to decrease the concentration of heavy metals in composts made from organic waste. This alongside a growing awareness on the benefits of an increased degree a recycling of nutrients from urban areas to agricultural soils led to the establishment of the CRUCIAL field trial in...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Environmental aspects.
Ano: 2016
URL: http://orgprints.org/30705/1/Rayo%20et%20al%20AGEE%202016.pdf

Grass cover retained by nose-ringing of outdoor sows only partially reduces the risk of N leaching
Provedor de dados: Organic Eprints
Autores: Eriksen, J.
Nose-ringing is an option to maintain grass cover in outdoor pig production systems. However ringing is no guarantee for a low environmental load. Management choices in terms of feeding, animal density and nutrient distribution are at least as important in order to obtain a low nutrient loss potential.
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2005
URL: http://orgprints.org/6133/1/6133.PDF

Origin and composition of Dissolved Organic C and N from grass-clover mixtures
Provedor de dados: Organic Eprints
Autores: Rasmussen, Jim; Høgh-Jensen, Henning.
The C and N dynamics in perennial grass-clover mixtures are not fully understood although such mixtures dominate temperate grassland. The co-existence of clover and grass involves both competition for and transfer of nutrients between the species. The nutrients may originate from leaky root systems, from a rapid turnover of the fine root systems, or from degradation of more stabile organic material.     The aim of the study is  - to determine the origin of DOC and DON in grass-clover mixtures  - to determine the composition of DOC and DON from the species  - to investigate the transfer of C and N between grass and clover    Method:  In a third year grass-clover ley at the KVL research fields, mezotrons were installed to depths of 20, 40 and 60 cm in...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Specific methods.
Ano: 2004
URL: http://orgprints.org/3542/1/3542.ppt

Mehr Nachhaltigkeit dank DOMINO
Provedor de dados: Organic Eprints
Autores: Holtz, Thomas; Kelderer, Markus.
Das Projekt DOMINO verfolgt das Ziel, neue Technologien, Techniken und Maßnahmen zu entwickeln und zu bewerten, die den Bioanbau nachhaltiger gestalten sollen. Finanziert wird das dreijährige Projekt, das am 1. April 2018 angelaufen ist, von „CORE Organic“ (Coordination of European Transnational Research in Organic Food and Farming Systems). An dem Projekt beteiligt sind neben dem Versuchszentrum Laimburg noch weitere sechs europäische Forschungseinrichtungen (INHORT – Polen, Ctifl – Frankreich, Universität Hohenheim – Deutschland, FiBL – Schweiz, FGI – Bulgarien), wobei die Koordination bei der Università Politecnica delle Marche liegt.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Biodiversity and ecosystem services; Weed management.
Ano: 2018
URL: http://orgprints.org/34381/1/Holtz_Mehr%20Nachhaltigkeit%20dank%20DOMINO.pdf

Zeytin Kekinin (Pirinanın) Kompost Yapım Teknikleri   ve Organik Gübre Olarak Kullanım Olanaklarının Araştırılması
Provedor de dados: Organic Eprints
Autores: Soyergin, Serap; Uysal, Erdinç; Albayrak, Barış.
Marmara Bölgesinde sofralık zeytin çeşidi yetiştirilse de sofralık olarak değerlendirilmeyen zeytinler yağa işlenmekte ve bu amaçla hemen hemen her köyde bir yağhane (çoğu continu sistem) bulunmaktadır. Bu tesislerde zeytin yağa işlendikten sonra elde edilen pirina (halk arasında zeytin keki) genellikle yakıt olarak kullanılmakta, yağlı bir materyal olması nedeniyle yanma esnasında çevre kirliliğine neden olmaktadır.   Türkiye topraklarının % 75’inden fazlasında organik madde ve azot düzeyinin düşük ve çok düşük olması özellikle tarımsal atıkların tekrar tarımda kullanılma olanaklarının araştırılmasını zorunlu kılmaktadır. Bu görüşten hareketle % 95 oranında organik madde içeren bu materyalin tarımda tekrar kullanım olanaklarının araştırılması amacıyla...
Tipo: Book chapter
Palavras-chave: "Organics" in general; Farming Systems; Nutrient turnover.
Ano: 2011
URL: http://orgprints.org/20682/1/Zeytin_keki.pdf

A discussion of norms for S supply in organic farming based on content in forage and ruminant performance in Norway
Provedor de dados: Organic Eprints
Autores: Hansen, Sissel; Bakken, Anne Kjersti.
The content of sulphur (S) in grassland on 27 Norwegian organic farms with dairy or sheep production was investigated in 2001 and 2002. The forage content of S was below the norms (2 g S kg DM-1) for both plants and animals in a large proportion of the samples. The average S content in forage at dairy farms was 1.4 g S kg DM-1 and at sheep farms 1.5 g. Even on grasslands with low plant S content (&lt;1 g S kg DM-1), S-fertilization did not increase yields and increased the plants’ S content only very slightly. No indications of S deficiency were observed on the dairy farms. For one sheep farm with a forage S content of 1.1 ± 0.1g S kg DM-1, brittle and short winter wool was reported.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Pasture and forage crops; Feeding and growth.
Ano: 2008
URL: http://orgprints.org/11946/1/11946.pdf

Nitrogen management in organic horticultural rotation
Provedor de dados: Organic Eprints
Autores: Machado Pinto, Rui Manuel.
A field crop rotation with a cover crop of hairy vetch (Vicia sativa, L.) and rye (Secale cereale, L.)followed by potato (Solanum tuberosum L.) and lettuce (Lactuca sativa, L.)was set up with the aim of improving nitrogen (N) management for organic agriculture. N mineralization was determined by a field incubation in response to green manure and increasing rates of compost (20 and 40 t/ha) and organic commercial ferlizer (1 and 2 t/ha). N mineralization in compost took place during all crop rotation, but most of the organic fertlizer was mineralized during the first days after soil application. Consequently, N availability and potato crop yield was increased with 2 t/ha of organic fertilizer compared to 20 t/ha of compost, whereas lettuce yield increased...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/23586/1/23586_MM.pdf

Below ground C and N transformation processes in perennial grass-clover mixtures
Provedor de dados: Organic Eprints
Autores: Rasmussen, Jim.
Leaching of N from grass-clover mixtures have been found in both organic and inorganic form. The environmental impact of this loss is however not well understood as leaching of organic C acting as energy source for denitrifying microorganisms could reduce the negative impact of N losses. In the present project the sources of N and C loss from perennial grass-clover swards were investigated in two field experiments using 14C and 15N tracers. The main findings of the project show that fresh plant material (&lt; 1 year) does not contribute significantly to DOC leaching, whereas both fresh ryegrass and clover material was shown to contribute to DON and DIN losses.     Paper I: Carbon (C) and nitrogen (N) dynamics in a third production year ryegrass-clover...
Tipo: Thesis
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2007
URL: http://orgprints.org/10663/1/10663.pdf

Inkubationsversuche zum Einfluss von Sorte und Textur auf den  Umsatz von Lupinenkörnerschroten im Boden bei  unterschiedlichen Temperaturen
Provedor de dados: Organic Eprints
Autores: Li, Dr. Zhifang; Sabahi, Hossein; Schulz, Dr. Rudolf; Müller, Prof. Dr. Torsten.
Organically produced legume seed meals are an upcoming alternative to established  fast mineralising organic fertilisers based on plant and animal waste products with  suspect origin (e.g. hornmeal). The turnover in soil was investigated with respect to  the influence of legume variety and seed meal texture. Variety specific differences in  net N mineralisation could be attributed to differences in C/N ratio and cellulose  content. The influence of texture classes on net N mineralisation was considerably  smaller than the influence of differences between the investigated species.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Composting and manuring.
Ano: 2009
URL: http://orgprints.org/13877/1/Li_13877.pdf

Decomposition rate of organic fertilizers: effect on yield, nitrogen availability and nitrogen stock in the soil
Provedor de dados: Organic Eprints
Autores: van Opheusden, A.H.M.; van der Burgt, G.J.H.M.; Rietberg, P.I.
The nitrogen of organic fertilizers does not fully mineralize within a season, and hence will partly become available in later years. This effect is taken into account for the first year but generally not in later fertilizer applications. If it would be taken into account, fertilizer use could be more efficient.  This study is an analysis of a 13-year field trial where crop yield was measured in 13 fertilizer treatments which differ in total N applied and decomposition rate. This is complemented with a model study in which mineralization and soil nitrogen content were calculated.  We intended to show step by step that the use of fertilizers with a low decomposition rate, relative to fertilizers with a high decomposition rate, lead in the course of years to...
Tipo: Report
Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2012
URL: http://orgprints.org/21697/1/2012%2D033_LbP_Decomposition_rate_of_organic_fertilizers_DIGIVERSIE_def.pdf

Organik Meyve Yetiştiriciliğinde Toprak Karbon İçeriğindeki Değişimler
Provedor de dados: Organic Eprints
Autores: Soyergin, Serap; Uysal, Erdinç; Yalçınkaya, Erol.
Organik tarım sistemlerinde birim alan başına küresel ısınma potansiyeli, konvansiyonel veya entegre sistemlerden önemli ölçüde azdır. Organik tarım, ekosisteme, iklim değişikliği etkilerine karşı daha dayanıklı olabilme özelliğini kazandırmakta ve tarımsal kaynaklı sera gazlarının oluşumunu azaltıcı tedbirleri içermektedir. Organik çiftliklerde karbon tutulma oranları uygulanan tarım sistemlerine göre önemli düzeyde farklılık gösterir. Toprak organik maddesi ve karbon içeriğinin organik tarım alanlarında artış gösterdiği yapılan çalışmalarla ortaya konmuştur. Bu çalışmada Marmara Bölgesinde değişik yıllarda yürütülen denemelerde organik ve konvansiyonel tarım alanlarında yapılan toprak karbon içerikleri karşılaştırmalı olarak verilmiş ve organik tarımın...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Nutrient turnover.
Ano: 2010
URL: http://orgprints.org/34150/1/Organik%20karbon.pdf

Raziskava razgradnje s pomočjo čajnih vrečk
Provedor de dados: Organic Eprints
Autores: Tresch, Simon; Fliessbach, Andreas.
Indeks čajne vrečke izračunamo s primerjavo razgradnje hitro razgradljivega zelenega čaja in težko razgradljivega čaja rooibos (»rdeči grm«). S tem postopkom dobimo informacije o zmožnosti tal (kot živega organizma) za predelavo organskih ostankov v rastlinam dostopna hranila in za izgradnjo humusa. Uporaba te tehnike je enostavna. Čajno vrečko zakopljemo v tla, jo po treh mesecih izkopljemo in pogledamo, koliko je od nje ostalo. Zelo zanimivo je videti sadove dela naših pridnih talnih pomočnikov in spremljati, kako njihovo delo zagotavlja hranila za novo generacijo rastlin za raziskovanje koreninskih mešičkov za vezavo dušika.
Tipo: Report
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/32830/7/Decomposition%20study_Slovenian_ISD.pdf

Maaimeststoffen in bedrijfs- en ketenverband: Plantaardige meststoffen in de praktijk
Provedor de dados: Organic Eprints
Autores: Hospers-Brands, A.J.T.M.; Burgt, Geert-Jan H.M.; Janmaat, Leen.
Maaimeststoffen in bedrijfs- en ketenverband Wie duurzaam landbouw bedrijft, zorgt goed voor de bodem. Naast aanvoer van mineralen vormt organische stof een sleutel bij de bemesting. De toepassing van maaimeststoffen biedt mogelijkheden voor het akker- en tuinbouwbedrijf. Maaimeststoffen zijn gewassen die worden gemaaid en vervolgens als plantaardige meststof worden ingezet op een ander perceel dan waar ze geteeld zijn. In deze brochure beschrijven we hoe maaimeststoffen ingezet kunnen worden en wat dat betekent voor de mineralenstromen op het bedrijf en voor de bodem. Natuurlijk met volop praktische tips, zodat u direct zelf aan de slag kunt.
Tipo: Other
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover; Soil.
Ano: 2015
URL: http://orgprints.org/29470/1/2967.pdf

N-fiksering - hvor meget og hvordan?
Provedor de dados: Organic Eprints
Autores: Vinther, F.P.
Denne biologiske proces er en forudsætning for at kunne drive økologisk jordbrug, og det har derfor stor interesse at kende størrelsen af N-fikseringen og have kendskab til hvilke faktorer der har betydning, for derved om muligt at kunne optimere produktiviteten og reducere eventuelle miljømæssige effekter af et givet dyrkningssystem.    En lang række undersøgelser har vist, at der er en forholdsvis konstant relation mellem høstet kløvertørstof og N-fiksering. I kløvergræs udgør N-fikseringen således 30-35 kg N per tons høstet kløvertørstof. Dvs. at hvis der i en kløvergræs i løbet af vækstsæsonen er produceret f.eks. 8 tons tørstof pr. ha og den gennemsnitlige kløverandel har været 25%, bliver N-fikseringen 60-70 kg N/ha. Hertil kommer imidlertid en række...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Pasture and forage crops.
Ano: 2004
URL: http://orgprints.org/4161/1/4161.pdf

Soil P and K availability defines below-ground biomass allocation of grass-legume leys
Provedor de dados: Organic Eprints
Autores: Cong, W.-F.; Christensen, B.T.; Eriksen, J.
Exploring the response of above- and below-ground biomass allocation to soil nutrient availability is crucial to reliably estimating root carbon (C) input and predicting long-term soil C dynamics. Despite this, belowground C input is often estimated by using yield-based allometric equations without considering the impacts of environmental factors or management practices such as fertiliser levels, which could lead to erroneous and uncertain estimates.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/34986/1/Abstract%20for%20Rothamsted%20Conference_Cong%20et%20al..docx

Vergleich von Bilanzierungsmethoden für Humus an Hand langjähriger Dauerversuche
Provedor de dados: Organic Eprints
Autores: Kolbe, Dr. Hartmut.
Es wurden verschiedene Methoden zur Beurteilung der Humusreproduktion auf ihre Genauigkeit und Praxistauglichkeit untersucht. Die Überprüfung der Verfahren erfolgte an Hand von Ergebnissen aus Dauerfeldversuchen des konventionellen und ökologischen Landbaus.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop husbandry; Soil quality.
Ano: 2006
URL: http://orgprints.org/8866/1/20060522_Poster_FeldtagRoda_Humus_Methoden_Alt.pdf

N2O emission from grass-clover swards is largely unaffected by recently fixed N2
Provedor de dados: Organic Eprints
Autores: Thyme, M.; Ambus, P.
The contribution of biologically fixed dinitrogen (N2) to the nitrous oxide (N2O) production in grasslands is unknown. To assess the contribution of recently fixed N2 as a source of N2O and the transfer of fixed N from clover to companion grass, mixtures of white clover and perennial ryegrass were incubated for 14 days in a 15N2-enriched atmosphere (0.4 atom% excess). Immediately after labelling, half of the grass-clover pots were sampled for N2 fixation determination, whereas the remaining half were examined for emission of 15N labelled N2O for another eight days using a static chamber method. Biological N2 fixation measured in grass-clover shoots and roots as well as in soil constituted 342, 38 and 67 mg N m-2 d-1 at 16, 26 and 36 weeks after emergence,...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Pasture and forage crops; Air and water emissions.
Ano: 2004
URL: http://orgprints.org/4148/1/4148.pdf

Berücksichtigung von Standort- und Bewirtschaftungsfaktoren bei der Verbesserung von Verfahren der Grunddüngung und Humusbilanzierung unterschiedlich intensiver Anbausysteme
Provedor de dados: Organic Eprints
Autores: Kolbe, Hartmut.
In dieser Ausarbeitung werden quantitative Zusammenhänge zwischen den Standort- und Bewirtschaftungsfaktoren und dem Verhalten an pflanzenverfügbaren Grundnährstoffen sowie den Gehalten an Humus im Boden ermittelt. Hierzu wurden Ergebnisse von vielen Felddauerversuchen aus Deutschland mit Hilfe der multiplen Regressionsanalyse ausgewertet. Die erlangten Erkenntnisse aus diesen Auswertungen wurden bei der Überprüfung und Verbesserung bestehender Verfahren der Grunddüngung und der Humusbilanzierung insbesondere des ökologischen Landbaus berücksichtigt.
Tipo: Working paper
Palavras-chave: Nutrient turnover; Soil quality; Composting and manuring.
Ano: 2007
URL: http://orgprints.org/11056/1/Einflussfaktoren_Grundduengg_Humus_OeL.pdf

Nitrate leaching from an organic dairy crop rotation: the effect of manure type, N-input and improved crop rotation
Provedor de dados: Organic Eprints
Autores: Eriksen, J.; Askegaard, M.; Kristensen, K.
Four management systems combining high and low livestock densities (0.7 and 1.4 LU ha-1) and different types of organic manure (slurry and straw based FYM) were applied to an organic dairy crop rotation (barley [undersown] – grass-clover – grass-clover – barley/pea – oats – fodder beet) between 1998 and 2001. The effects of the management systems on crop yields and nitrate leaching were measured. In all four years nitrate leaching, as determined using ceramic suction cups, was higher in the three crops following ploughing of grass-clover than under the barley or grass-clover. Overall, no significant differences in nitrate leaching were observed between the management systems. However, the replacement of the winter wheat crop used in the earlier...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2004
URL: http://orgprints.org/1824/1/paper.doc

Farm specific strategies to reduce environmental impact by improving health, welfare and nutrition of organic pigs
Provedor de dados: Organic Eprints
Robust and competitive organic pig production needs to encompass low environmental impacts and good animal health and welfare. In theory, improving animal health and welfare reduces environmental impacts through decreased medicine use, improved growth rates and feed conversion efficiency. However, as data on environmental impacts are scarce, the extent of such improvement has never been verified on working farms.  In organic pig production, health and welfare improvements must be implemented through preventive approaches, optimal disease management and innovative systems regarding outdoor areas. This poses a challenge to the farms. Together, organic regulations, different national welfare regulations and different building traditions have promoted the...
Tipo: Project description
Palavras-chave: Feeding and growth; Nutrient turnover; Health and welfare; Pigs.
Ano: 2023
URL: http://orgprints.org/20408/2/20408.pdf

Competition and complementarity in annual intercrops - the role of plant available nutrients
Provedor de dados: Organic Eprints
Autores: Andersen, Mette Klindt.
In the developed regions of the world crops are today primarily grown as sole crops and monocultures. However, increasing awareness of the link between agricultural practise, environmental issues and long-term stability of existing food production systems has put focus on the role that greater crop diversity in time (crop rotation) and space (field size and mixed cropping systems) may play in reducing the extent of these problems. Intercropping represents one way of increasing crop diversity. As a result of differences in the way component crops respond to and affect the environment in which they are grown intercrops may use available growth resources (light, water and nutrients) more efficiently, reduce the prevalence of disease and pests and reduce weed...
Tipo: Thesis
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Weed management; Biodiversity and ecosystem services.
Ano: 2005
URL: http://orgprints.org/6003/1/6003.pdf

Nitrogen dynamics of organic farming in a crop rotation based on red clover (Trifolium pratense) leys
Provedor de dados: Organic Eprints
Autores: Nykänen, Arja.
In agricultural systems which rely on organic sources of nitrogen (N), of which the primary source is biological N fixation (BNF), it is extremely important to use N as efficiently as possible with minimal losses to the environment. The amount of N through BNF should be maximised and the availability of the residual N after legumes should be synchronised to the subsequent plant needs in the crop rotation. Six field experiments in three locations in Finland were conducted in 1994-2006 to determine the productivity and amount of BNF in red clover-grass leys of different ages. The residual effects of the leys for subsequent cereals as well as the N leaching risk were studied by field measurements and by simulation using the CoupModel. N use efficiency (NUE)...
Tipo: Thesis
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/13524/1/met121.pdf

Source and temperature determine the releases of multiple amino acids from plant materials
Provedor de dados: Organic Eprints
Autores: El-Naggar, Ahmed; Rasmussen , Jim; de Neergaard, Andreas; El-Araby, Ahmed; Høgh-Jensen, Henning.
Agricultural crop production is largely dependent on inputs of mineral fertilizers. Mineral fertilizer prices are expected to rise as the competition for fossil energy increases. In order to increase the sustainability of crop production, alternatives to commercial mineral fertilizers are needed. Organic residues and fresh biomass are potentially important sources of nitrogen (N) in crop production. A study was conducted to investigate the impact of temperature on the release rate and profile of amino acids from soybean seeds (Glycine max L.) and fresh young shoots of chicory (Cichorium intybus), alfalfa (Medicago sativa) and red clover (Trifolium pratense) under anaerobic conditions. Plant material was incubated in water at either 15 ◦C or 35 ◦C, and the...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover; Farm nutrient management.
Ano: 2010
URL: http://orgprints.org/18293/1/18293.pdf

C and N turnover in structurally intact soils of different texture
Provedor de dados: Organic Eprints
Autores: Thomsen, I. K.; Schjønning, P.; Olesen, J.E.; Christensen, B. T.
The turnover of native and applied C and N in undisturbed soil samples of different texture but similar mineralogical composition, origin and cropping history was evaluated at –10 kPa water potential. Cores of structurally intact soil with 108, 224 and 337 g clay kg-1 were horizontially sliced and 15N-labelled sheep faeces was placed between the two halves of the intact core. The cores together with unamended treatments were incubated in the dark at 20°C and the evolution of CO2-C determined continuously for 177 d. Inorganic and microbial biomass N and 15N were determined periodically. Net nitrification was less in soil amended with faeces compared with unamended soil. When adjusted for the NO3-N present in soil before faeces was applied, net nitrification...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/272/1/HarmTaskArev.doc

Vergelijking van verschillende types bemesting in een bio fruitaanplanting van Conference
Provedor de dados: Organic Eprints
Autores: Vercammen, Jef; Gomand, Ann.
Tot op heden is er zowel in binnen- als buitenland heel weinig aandacht besteed aan het op punt stellen van de bemesting binnen de biologische perenteelt. Wanneer men enkel werkt met snelwerkende meststoffen als bloedmeel geeft men enkel N. Maar ook K is belangrijk. Daarom wordt er gekeken wat de mogelijkheden zijn van drijfmest, digestaat, stalmest, …  Naast de voeding geven deze elementen bovendien nog een zekere hoeveelheid organisch materiaal, wat zeker belangrijk is naar bodemstructuur en bodemleven. De vraag is echter of deze tragere meststoffen wel voldoende N leveren aan het begin van het seizoen. Om dit te ondervangen werd bij het laatste object gebruik gemaakt van humuszuren om de mineralisatie en de opname te vergroten.  Bij een oudere aanplant...
Tipo: Newspaper or magazine article
Palavras-chave: Composting and manuring; Nutrient turnover; Fruit and berries; Farm nutrient management.
Ano: 2016
URL: http://orgprints.org/29998/1/vv%20bemesting%20conference%20pcfruit%202014%202015.pdf

Bodenumsatz von Getreidestroh und Gärresten unterschiedlicher Qualität aus der Strohvergärung
Provedor de dados: Organic Eprints
Autores: Knebl, Lucas; Blumenstein, Benjamin; Möller, Detlev; Wufka, André; Brock, Christopher; Gattinger, Andreas.
In einem Feldversuch auf zwei Standorten (Lehm, Sand) wurde in zwei Serien der Einfluss der Stroh-Aufbereitung auf dessen Umsatz im Boden untersucht. Die untersuchten Düngervarianten umfassten: Stroh (STR) sowie Stroh mit zusätzlicher Stickstoffgabe in Form von Hühnertrockenkot (STR+N), Rottemist (RM) und flüssigem, wie trockenem Gärrest (GRflüssig, GRtrocken) aus der Strohvergärung mit Hühnertrockenkot. Das Stroh der Varianten STR und STR+N wurde nach Ernte der Vorfrucht (Sommergetreide) eingearbeitet. Die restlichen Varianten wurden im Frühjahr appliziert. Um den Umsatz der Düngervarianten zu erfassen wurde die Produktion von CO2, N2O und CH4 in regelmäßigen Abständen an beiden Standorten gemessen. Zusätzlich erfolgte die Erhebung von Kohlenstoff- und...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2019
URL: http://orgprints.org/36243/1/Beitrag_319_final_a.pdf

Forfrugtsværdi og N-udvaskning efter ompløjning af flerårige græsmarker med forskellige forhistorier
Provedor de dados: Organic Eprints
Autores: Eriksen, J; Mogensen, J.
Undersøgelsens formål var at forbedre kvælstofudnyttelsen og mindske uønskede miljømæssige konsekvenser af sædskiftet på intensive malkekvægsbedrifter. Eftervirkningen af seks forskellige græsmarkstyper (1994-96) på udbytte og nitratudvaskning i de efterfølgende kornafgrøder (1997-99) blev undersøgt på lerblandet sandjord ved Forskningscenter Foulum. Græsmarkerne var ugødet kløvergræs og gødet rajgræs enten til slæt eller afgræsset med malkekøer fodret med to niveauer af N i suppleringsfoder.    I det første år efter ompløjning var der tilstrækkeligt eftervirkning af afgræsningsmarkerne til at overflødiggøre yderligere gødningstilførsel, men i de følgende år var der gradvist behov for mere N-gødning for at opnå optimale udbytter. Jordbehandling blev...
Tipo: Report
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/230/1/rapport.doc