黑土农田大豆产量形成过程的模拟验证

Simulation and validation of soybean yield formation process in black-soil

以中国科学院海伦农业生态站长期定位水肥耦合试验数据为依据，模拟大豆产量形成过程。首先建立大豆品种遗传属性数据库和相应的模型参数，利用DSSAT模型系列中的CropGro-Soybean模型，对大豆品种遗传属性、作物产量和生长过程中土壤水分进行了模拟验证。模拟结果表明，CropGro-Soybean模型能够准确地模拟大豆生育期，相对误差在-2％～3％之间，均方根误差RMSE为2．3。对不同年际不同田间处理的大豆产量模拟结果分析的相对误差在-7％～9％之间，均方根误差RMSE为75．9，模型性能指数EF为0．8。模型对不同层次土壤水分变化的模拟效果也较好。

Soybean yield and growth processes were simulated based on long-term effects of water and fertilizer application at the Hailun Experimental Station of Agricultural Ecology, Chinese Academy of Sciences. A database for the soybean cultivar genetic characters and related model parameters were established for the modeling. The soybean phenology, yield and soil water for different growth stages were validated with DSSAT-CropGro-Soybean model. The analysis indicates that the model simulates phenological stages of soybean with only -2%～3% relative error and a RMSE of 2.3. Crop yield for different years and different field treatments has a relative error range of -7%～9%, 75.9 RMSE and 0.8 EF. The model result for soil water content in different soil layers is good.