127: Catch Crops in Organic Farming Systems without Livestock Husbandry - Model Simulations
(2002) Catch Crops in Organic Farming Systems without Livestock Husbandry - Model Simulations. Paper presented at 17th World Congress of Soil Science, Bangkok, Thailand, 13-20 August 2002; Published in Kheoruenromme, Dr. Irb, Eds. Conference Transactions, page 830.1-830.9. International Union of Soil Science.**
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Summary
During the last years, an increasing number of stockless farms in Europe converted to organic farming practice without re-establishing a livestock. Due to the lack of animal manure as a nutrient input, the relocation and the external input of nutrients is limited in those organic cropping systems. The introduction of a one-year green manure fallow in a 4-year crop rotation, including clover-grass mixtures as a green manure crop is the classical strategy to solve at least some of the problems related to the missing livestock. The development of new crop rotations, including an extended use of catch crops and annual green manure (legumes) may be another possibility avoiding the economical loss during the fallow year.
Modelling of the C and N turnover in the soil-plant-atmosphere system using the soil-plant-atmosphere model DAISY is one of the tools used for the development of new organic crop rotations. In this paper, we will present simulations based on a field experiment with incorporation of different catch crops.
An important factor for the development of new crop rotations for stockless organic farming systems is the expected N mineralisation and immobilisation after incorporation of the plant materials. Therefore, special emphasise will be put on the simulation of N-mineralisation/-immobilisation and of soil microbial biomass N. Furthermore, particulate organic matter C and N as an indicator of remaining plant material under decomposition will be investigated.
| Document Language: | English |
|---|---|
| Keywords: | catch crop modelling Daisy mineral N soil microbial biomass |
| Subject Areas: | Soil > Nutrient turnover Crop husbandry > Production systems Crop husbandry > Crop combinations and interactions Crop husbandry > Production systems > Vegetables Soil > Soil quality > Soil biology |
| Research affiliation: | Denmark > DARCOF II (2000-2005) > IV.1 (EXUNIT) Experimental units for research in organic farming systems Denmark > DARCOF II (2000-2005) > I. 3 (BIOMOD) Interaction between nitrogen dynamics, crop production and biodiversity |
| Funding Part: | 5-25% |
| Orgprints ID Number: | 127 |
| Contact: | Jensen, Dr. Lars Stoumann |
| Deposited On: | 08 October 2002 |
| EPrint Type: | Conference paper |
| Published?: | Published |
| Peer Review Status: | Not peer-reviewed |
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