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