长江下游地区马肝土小麦生长期土壤氮素动态的模拟

Simulation on Soil Nitrogen Dynamic During Wheat Growing Season in the Lower Valley of the Yangtze River

根据土壤氮素平衡原理对小麦生长期０～４０ｃｍ土层有效氮含量进行了模拟，并用试验资料对模型进行了检验。结果表明，模拟值与实测值平均绝对误差为－２０．１ｋｇ／ｈｍ２，绝对误差标准误为３２．

A model was developed to simulate the soil nitrogen dynamics during wheat growing season in the lower valley of the Yangtze River based on soil nitrogen equation. The model was used to simulate the average available nitrogen content in soil profile of 0～40cm deep during the wheat growing season in Nanjing area and parameters in the model were determined using experimental data. The results showed that the average absolute error between the simulated data and the observed data was -20.1 kg/hm 2, and the standard error of the average absolute error was 32.1 kg/hm 2.