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POSSIBILITIES AND LIMITATIONS FOR THE USAGE OF DYNAMIC GROECOSYSTEM MODELS WITHIN DESICION SUPPORT SYSTEMS ON FARM LEVEL

Dynamic agroecosystem models can be used both for supporting operative desicions finding in order to realize agrotechnical measures in plant production and for evaluating the mediumand long-term consequences of possible changes in land use and climate. In this paper the AGROSIM named family of agroecosystem models suitable for answering both questions is briefly represented. The general possibilities to use agroecosystem models for studying the consequences of different agrotechnical measures (N-fertilization, irrigation, pest control) as well as for model integration into farm-level desicion support systems are studied and discussed exemplarily for the winter wheat component model. Finally the possibilities, problems and limitations of agroecosystem model transfer to different European locations (France, Netherlands, Poland, Germany) are investigated and discussed on the basis of model adaptation calculations.