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| Registros recuperados: 882 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 882 | |
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