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Bestimmung der N-Fixierung unterschiedlicher Wintererbsengenotypen im Vergleich zu einer Sommererbse in Rein- und Gemengesaat

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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Summary

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.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Wintererbse, N-Fixierung, Pflanzenernährung, Körnerleguminose
Subjects: Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Crop combinations and interactions
Research affiliation: International Conferences > 2009: Scientific Conference on Organic Agriculture > Pflanze und Boden > Pflanzenernährung; N2-Fxierung
Related Links:http://www.wissenschaftstagung.de/, http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37
Deposited By: Urbatzka, MSC Peer
ID Code:14383
Deposited On:15 Apr 2009
Last Modified:12 Apr 2010 07:37
Document Language:German - Deutsch
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Dieser Beitrag ist im Tagungsband der 10. Wissenschaftagung erschienen:
Mayer, J.; Alföldi, T.; Leiber, F.; Dubois, D.; Fried, P.; Heckendorn, F.; Hillmann, E.; Klocke, P.; Lüscher, A.; Riedel, S.; Stolze, M.; Strasser, F.; van der Heijden, M. and Willer, H., (Hrsg.) (2009) Werte – Wege – Wirkungen: Biolandbau im Spannungsfeld zwischen Ernährungssicherung, Markt und Klimawandel. Beiträge zur 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.
Band 1: Boden, Pflanzenbau, Agrartechnik, Umwelt- und Naturschutz, Biolandbau international, Wissensmanagement
Band 2: Tierhaltung, Agrarpolitik und Betriebswirtschaft, Märkte und Lebensmittel.
Verlag Dr. Köster, Berlin.
Der Tagungsband kann beim Verlag Dr. Köster bezogen werden; siehe http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37

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