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Stickstoffaufnahme und Biomasseertrag von Zwischenfrüchten und deren Auswirkungen auf Bodennitratgehalte und die Folgekultur unter den Bedingungen des Ökologischen Landbaus im pannonischen Klimagebiet

Rinnofner, T.; Farthofer, R.; Friedel, J.K.; Pietsch, G.; Loiskandl, W. and Freyer, B. (2005) Stickstoffaufnahme und Biomasseertrag von Zwischenfrüchten und deren Auswirkungen auf Bodennitratgehalte und die Folgekultur unter den Bedingungen des Ökologischen Landbaus im pannonischen Klimagebiet. [Nitrogen uptake and yield of catch crops and their impact on nitrate content in soil under the conditions of organic farming in the pannonic climate region.] In: Heß, J and Rahmann, G (Eds.) Ende der Nische, Beiträge zur 8. Wissenschaftstagung Ökologischer Landbau, kassel university press GmbH, Kassel.

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Summary

Data on the potential of catch crops to reduce soil nitrate contents, on their N accumulation and biological nitrogen fixation (BNF) are lacking for organic farming in the dry, pannonic region of Eastern Austria. The effect of legume, non-legume, and legume + non-legume crops used as catch crops on inorganic soil nitrogen, crop biomass and crop N, and BNF were tested in comparison to bare fallow. Non-legumes and legumes + non-legumes were more efficient than legumes in reducing inorganic soil N contents in autumn and nitrate contents in soil solution from the subsoil in winter. This reduction in inorganic soil N did not last until March of the following year due to N mineralisation from the mulch. The legume + non-legume mixture contained a larger amount of crop N than both legumes and non-legumes. This was due to the combined effect of soil-N uptake by the non-legumes and BNF by the legumes in the mixture.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Bodenfruchtbarkeit, Pflanzenbau, Wasserhaushalt
Subjects: Crop husbandry > Crop combinations and interactions
Research affiliation: International Conferences > 2005: Scientific Conference on Organic Agriculture
Austria > Univ. BOKU Wien > Sustainable Agr. Systems - IfÖL
Deposited By: Rinnofner, Mag. Thomas
ID Code:3431
Deposited On:05 Mar 2005
Last Modified:12 Apr 2010 07:29
Document Language:German - Deutsch
Status:Published
Refereed:Peer-reviewed and accepted

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