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Plant biomass nitrogen and effects on the risk of nitrate leaching of intercrops under organic farming in Eastern Austria

Farthofer, R.; Friedel, J. K.; Pietsch, G.; Rinnhofer, T.; Loiskandl, W. and Freyer, B. (2004) Plant biomass nitrogen and effects on the risk of nitrate leaching of intercrops under organic farming in Eastern Austria. Paper at: EUROSOIL 2004, Freiburg, Germany, Sept. 4th to 12th.

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Online at: http://kuk.uni-freiburg.de/hosted/eurosoil2004/full_papers/id355_Friedel_full.pdf

Summary

Data on the potential of intercrops 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 legumes, non-legumes, and legumes + non-legumes used as intercrops on inorganic soil nitrogen, crop yield and biomass 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 an 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:plant biomass nitrogen, nitrate leaching, intercrops, Eastern Austria, legumes,
Subjects: Crop husbandry > Crop combinations and interactions
Soil
Research affiliation: Austria > Univ. BOKU Wien > Sustainable Agr. Systems - IfÖL
Related Links:http://bokudok.boku.ac.at/bokudok/search_project.show_project?project_id_in=4071
Deposited By: Friedel, Dr. Jürgen K.
ID Code:5789
Deposited On:03 Nov 2005
Last Modified:12 Apr 2010 07:31
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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