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建立并验证了一个排水条件下田间─维饱和─非饱和土壤中 ＮＨ４＋—Ｎ和ＮＯ３－－Ｎ运移与转化的耦合模型，模型中考虑了有机质的矿化、氮素的吸附、硝化、反硝化、氨气挥发及作物根系吸氮等氮素转化作用过程，同时也考虑了土壤温度和湿度对氮素转化的影响。该模型可用于描述田间土壤中氮素的行为，所得结论可供农业生产实际和环境保护参考。
A coupled model of NH4 + -N and NO3 - N transport and transformation in field-saturated and unsaturated soil under drainage condition was established and validated. The model considers the mineralization of organic matter, the adsorption of nitrogen, nitrification, Nitrification, ammonia volatilization and nitrogen uptake by crop roots. The effects of soil temperature and humidity on nitrogen transformation were also considered. The model can be used to describe the behavior of nitrogen in the field soil, the conclusions can be used for practical agricultural and environmental protection reference.