Simulation of the effects of nitrogen supply on yield formation processes in winter wheat with the model TRITSIM期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Simulation of the effects of nitrogen supply on yield formation processes in winter wheat with the model TRITSIM

Authors:	W. Mirschel H. Kretschmer E. Matthäus R. Koitzsch

Affiliation:	(1) Research Centre of Soil Fertility Müncheberg, Academy of Agricultural Sciences of the GDR, Wilhelm-Pieck-Strasse 72, 1278 Müncheberg, Germany;(2) Central Institute of Cybernetics and Information Processes Berlin, Academy of Science of the GDR, Kurstrasse 33, 1080 Berlin, Germany;(3) Research Institute for Agrometeorology Halle of the Meteorological Service of the GDR, Agrometeorological Research Station, Wilhelm-Pieck-Strae 72e, 1278 Müncheberg, Germany

Abstract:	An outline of the dynamic winter wheat model TRITSIM is given. The model describes in one-day steps growth, yield formation and development of a crop from post-winter tillering until harvest under various conditions of water and nitrogen supply. TRITSIM is coupled with a simple soil nitrogen model and a soil water model to describe effects of nitrogen and water on yield formation processes. Comparisons between model and experimental results for ontogenesis, grain biomass, nitrogen uptake and soil mineral nitrogen are given for a series of Dutch experiments. Simulations were satisfactory, except for the time course of soil mineral nitrogen.

Keywords:	Agroecosystem model nitrogen supply yield formation mineralization simulation nitrogen uptake
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