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| Registros recuperados: 882 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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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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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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: 2024 |
URL: http://orgprints.org/20408/2/20408.pdf |
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| 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: 2024 |
URL: http://orgprints.org/5095/1/Richner%2D2005%2DHofduengerwirtschaft.pdf |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 882 | |
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