Dux, J. and Fink, M. (2007) Effects of long-term farmyard manure applications on soil organic matter, nitrogen mineralization and crop yield – a modeling study –. Paper at: 3rd QLIF Congress: Improving Sustainability in Organic and Low Input Food Production Systems, University of Hohenheim, Germany, March 20-23, 2007.
To develop sustainable cropping systems we need to predict both short-term and long-term effects of management practices on soil fertility. For this purpose agro-ecosystem simulation models are valuable tools. We used the Daisy model to simulate a three-year crop rotation (beetroot, onion, white clover, potato) over a period of 40 years. With this rotation, three rates of farmyard manure were tested (0, 15, 28 t ha-1 year-1). After 40 years without manure soil organic matter carbon (SOM-C) decreased by approximately 40%, and increased by 27% with the highest application rate. SOM turnover did not reach equilibrium at the end of the experiment. Nitrogen mineralization from SOM followed in the long-term (40 years) the slowly changing time courses of SOM. However, manure applications affected mineralization and hence crop yield and nitrogen losses much more in the short-term (1 to 2 years) than in the long-term.
|EPrint Type:||Conference paper, poster, etc.|
|Type of presentation:||Paper|
|Keywords:||vegetable production, farmyard manure, soil fertility|
|Subjects:||Crop husbandry > Composting and manuring|
|Research affiliation:|| European Union > QualityLowInputFood > Subproject 3: Crop production systems|
International Conferences > 2007: 3rd QLIF Congress > 3 Crop production / soil management
|Deposited By:||Dux, Julia|
|Deposited On:||07 Mar 2007|
|Last Modified:||12 Apr 2010 07:34|
|Additional Publishing Information:|| The final version of this paper is published in: |
Niggli, Urs; Leifert, Carlo; Alföldi, Thomas; Lück, Lorna and Willer, Helga, Eds. (2007) Improving Sustainability in Organic and Low Input Food Production Systems. Proceedings of the 3rd International Congress of the European Integrated Project Quality Low Input Food (QLIF). University of Hohenheim, Germany, March 20 – 23, 2007. Research Institute of Organic Agriculture FiBL, CH-Frick.http://orgprints.org/10417/
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