AquaCrop作物模型在松嫩平原春麦区的校正和验证

Calibration and Validation of AquaCrop Model in Spring Wheat Region of Songnen Plain

为了研究AquaCrop作物模型在松嫩平原春麦区的适用性,利用实测的土壤水分、春小麦生长和产量数据,结合气象数据,获得AquaCrop模拟土壤水分和春小麦生长的模型参数,并用往年的作物生长数据对模型进行验证。结果表明,春小麦的产量和生物量的实测值与模拟值的绝对平均误差(MAE)为0.058和0.109、均方根误差(RMSE)为0.06和0.11t/hm2、模拟性能指数(EF)为0.795和0.822、残差聚集系数(CRM)为-0.006 96和0.005 87、一致性系数(IoA)为0.959和0.966;对10cm和20cm土壤体积含水率的实测值与模拟值的MAE为5.23和2.53、RMSE为6.47%和7.95%、EF为-0.277和-0.069、CRM为0.097和0.212、IoA为0.585和0.741。说明AquaCrop模型对春小麦的生物量和产量及生育期土壤体积含水率的模拟结果总体较好,对松嫩平原春麦生产有一定的参考意义。

In this study,the measured soil moisture,spring wheat growth and yield data,combined with meteorological data obtained AquaCrop soil moisture and spring wheat growth simulation model parameters,and previous years＇ data for the crop model validation.The results showed that the simulated values and measured values of spring wheat＇s yield and biomass MAE were 0.058 and 0.109,RMSE were 0.06 and 0.11 t/hm2,EF were 0.795 and 0.822,CRM were-0.006 96 and 0.005 87,IoA were 0.959 and 0.966;for 10 cm and 20 cm in depth soil volumetric water content of the simulated values and measured values,MAE were 5.23 and 2.53,RMSE were 6.47% and 7.95%,EF were-0.277 and-0.069,CRM were 0.097 and 0.212,IoA were 0.585 and 0.741.AquaCrop model of biomass and yield of spring wheat growth stages and soil volumetric water content of the simulation results is fine,the production of spring wheat Songnen Plain has some reference value.