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| Registros recuperados: 16 | |
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| Hüppi, Roman; Neftel, Albrecht; Lehmann, Moritz F.; Krauss, Maike; Six, Johan; Leifeld, Jens. |
| Biochar, a carbon-rich, porous pyrolysis product of organic residues, is evaluated as an option to tackle major problems of the global food system. Applied to soil, biochar can sequester carbon and have beneficial effects on nitrogen (N) cycling, thereby enhancing crop yields and reducing nitrous oxide (N2O) emissions. There is little understanding of the underlying mechanisms, but many experiments indicated increased yields and manifold changes in N transformation, suggesting an increase in N use efficiency. Biochar's effects can be positive in extensively managed tropical agriculture, however less is known about its use in temperate soils with intensive fertilisation. We tested the effect of slow pyrolysis wood chip biochar on N use efficiency, crop... |
| Tipo: Journal paper |
Palavras-chave: Soil quality Cereals; Pulses and oilseeds Air and water emissions. |
| Ano: 2016 |
URL: http://orgprints.org/34685/1/hueppi_etal-2016_EnvironResLett-Vol11-p084013.pdf |
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| Dreymann, S.; Loges, R.; Taube, F.. |
| Im Rahmen des Forschungsschwerpunktes „Ökologischer Landbau und extensive Landnutzungssysteme“ wurden auf dem Versuchsgut für Ökologischen Landbau der Universität Kiel (Lindhof) in den Jahren 1999-2003 Untersuchungen zur Optimierung des N-Transfers vom Kleegras zur Folgefrucht Getreide durchgeführt. Als Versuchsfaktoren wurde die Kleegras-Bewirtschaftung (3x Schnittgutabfuhr, 2x Schnittgutabfuhr + 1x Mulchen, 3x Mulchen), die Umbruchart (Pflug, Fräse + Pflug), der Umbruchtermin (Herbstumbruch/ Winterweizen, Frühjahrsumbruch/ Sommerweizen bzw. Hafer) und eine organische Düngung zu EC 45 (0, 75 kg N/ha) geprüft. Die Kleegras-Bewirtschaftung beeinflusste nicht den Kornertrag von Winterweizen (Ø 48,4 dt/ha), Sommerweizen (Ø 46,6 dt/ha) und Hafer (Ø 58,5... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Pasture and forage crops Cereals; Pulses and oilseeds Air and water emissions. |
| Ano: 2003 |
URL: http://orgprints.org/4591/1/dreymann_giessen2003_orgprints.pdf |
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| Joynes, A; Hatch, D; Stone, A. |
| Three spring-sown species of lupins (Bora, Prima and Wodjil) and peas were compared in terms of N fixation and subsequent leaching under a following winter cereal crop. Although peas out-yielded lupins (5.4 t compared with ca 3.5 t grain, respectively), the yellow lupin (Wodjil) fixed more N than peas (180 compared with 120 kg N ha-1) and all three lupins contained more protein (> 30%) than the peas (22%). Wodjil was the most effective at suppressing weeds, carrying only 12% of the weed burden found in fallow plots, followed by peas (19%). Winter leaching amounted to > 50 kg nitrate-N ha-1 from under the winter cereal, regardless of whether the previous treatment was a legume crop or was left fallow. There were no significant differences in leaching... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Cereals; Pulses and oilseeds Air and water emissions. |
| Ano: 2006 |
URL: http://orgprints.org/10248/1/An_assessment_of_nitrogen_fixation_in_'organically_managed'_spring%2Dsown_lupins_and_leaching_under_a_following_winter_cereal.pdf |
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| Doltra, Jordi; Lægdsmand, Mette; Olesen, Jørgen Eivind. |
| The effects of nitrogen (N) availability related to fertilizer type, catch crop management, and rotation composition on cereal yield and grain N were investigated in four organic and one conventional cropping systems in Denmark using the FASSET model. The four-year rotation studied was: spring barley–(faba bean or grass-clover)– potato–winter wheat. Experiments were done at three locations representative of the different soil types and climatic conditions in Denmark. The three organic systems that included faba bean as the N fixing crop comprised a system with manure (stored pig slurry) and undersowing catch crops (OF+C+M), a system with manure but without undersowing catch crops (OF−C + M), and a system without manure and with catch crops (OF + C−M). A... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Air and water emissions. |
| Ano: 2011 |
URL: http://orgprints.org/18764/1/18764.pdf |
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| Registros recuperados: 16 | |
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