【摘要】 本文通过冬小麦春季生长阶段的田间试验检验了土壤水、热和氮素联合模拟模型，结果表明土壤含水量、土壤温度以及土壤无机氮含量的模拟计算值与实测值吻合程度较好．应用经检验的模型和有关参数，模拟计算了不同灌水条件下土壤氮素动态，结果看出：在本试验条件下，在冬小麦返青到收获期间，各灌水处理１ｍ深处总体上不存在土壤无机氮淋洗渗漏，而是不同程度的上升补给．反硝化和氮挥发是氮素损失的主要途径．更多还原

【Abstract】 In this paper, the soil water-heat-nitrogen join simulation model was tested with the experimental data of winter wheat during the spring period. The resuts indicate that the calculated results are well agree with the observed values of soil water content,soil temperature and soil mineral nitrogen content.The model is used to estimate the soil nitrogen behavior in winter wheat field with different irrigation amounts. The results show that under the climate, soil and crop conditions in Beijing, no nitrogen leaching happened at 100cm depths in the period from returning green stage to harvest, but the upward suppliment of nitrogen flow will take place.The denitrification and NH3 volatilization from soil are main paths of soil nitrogen loses.更多还原