论文部分内容阅读
简要介绍了美国乔治亚大学组织开发的DSSATV4.5模型,并利用洛阳市孟津县2005~2006年冬小麦田间试验结果对模型的模拟结果进行验证及其适用性分析。通过对冬小麦叶面积指数、产量和农田土壤水分、水分利用效率的模拟与实测结果的对比分析,认为DSSAT模型的模拟效果较好。分析结果表明:模型对叶面积指数的模拟误差RMSE在0.034~0.076之间;模拟各处理的产量与水分利用效率也与实测值的关系基本一致;对各处理土壤体积含水量的RMSE误差在0.051~0.151之间。研究结果认为DSSAT模型在豫西应用的适宜性较好,可为该地区研究保护性耕作对冬小麦生长及土壤水分的影响提供理论支持。
The DSSATV4.5 model developed by the University of Georgia in the United States was briefly introduced. The simulation results of winter wheat field in Mengjin County of Luoyang City from 2005 to 2006 were validated and the applicability of the model was verified. Through comparative analysis of simulated and measured results of leaf area index, yield and soil moisture and water use efficiency of winter wheat, DSSAT model is considered to be a good simulation. The results showed that the model RMSE of the leaf area index was between 0.034 and 0.076. The relationship between the yield and the water use efficiency of the simulated treatments was basically the same as the measured value. The RMSE error of soil water content was 0.051 ~ 0.151 between. The results show that the DSSAT model is more suitable for application in western Henan, which can provide theoretical support for the study of the effect of conservation tillage on the growth of winter wheat and soil moisture.