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