| Registro completo |
| Provedor de dados: |
Organic Eprints
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| País: |
Germany
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| Título: |
Bestimmung der N-Fixierung unterschiedlicher Wintererbsengenotypen im Vergleich zu einer Sommererbse in Rein- und Gemengesaat
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| Autores: |
Urbatzka, M Sc Peer
Graß, Dr. Rüdiger
Schüler, Dr. Christian
Trautz, Prof. Dieter
Heß, Prof. Jürgen
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| Data: |
2009
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| Ano: |
2009
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| Palavras-chave: |
Cereals
Pulses and oilseeds Crop combinations and interactions
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| Resumo: |
In organic farming the cultivation of leguminous crops is one of the most important sources of nitrogen (N). However, regarding the amount of N fixed, there are hardly any published data for winter peas. Therefore, the N fixation of five regular leafed winter peas types and one semi-leafless spring pea cultivar in single and mixed cropping (with winter rye spring cereals respectively) was measured in four successive growing seasons (2003/04 – 2006/07) at the experimental farm of the University of Kassel and in two consecutive vegetation periods (2005/06 - 2006/07) at the experimental farm of the University of Applied Science in Osnabrueck. The amount of N fixed was calculated according to the extended difference method at the beginning of flowering and at grain harvest. N fixation was usually higher for winter peas than for spring pea. At the beginning of flowering the amount of N fixed in pure stands was with a mean value of 92 kg ha-1 for winter peas and 29 kg ha-1 for the spring pea higher than in mixture with a mean value of 42 and 15 kg ha-1 respectively. At grain harvest the amount of N fixed for the spring pea in pure stands was higher than in mixtures with a mean of 65 and 33 kg ha-1 respectively. On the other hand the N fixation for winter peas was usually comparable in pure and mixed stands with a mean of 100 and 86 kg ha-1 respectively. This was a consequence of the higher pea grain yield in mixture than in pure stands and of a reduced biomass (leaves) loss in mixtures. Therefore, regular leaf winter peas can contribute to the N supply of the crop rotation better than spring peas.
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| Tipo: |
Conference paper, poster, etc.
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| Idioma: |
deu
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| Identificador: |
http://orgprints.org/14383/1/Urbatzka_14383.pdf
Urbatzka, M Sc Peer; Graß, Dr. Rüdiger; Schüler, Dr. Christian; Trautz, Prof. Dieter and Heß, Prof. Jürgen (2009) Bestimmung der N-Fixierung unterschiedlicher Wintererbsengenotypen im Vergleich zu einer Sommererbse in Rein- und Gemengesaat. Paper at: 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.
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| Relação: |
http://orgprints.org/14383/
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| Formato: |
application/pdf
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