棉花膜下滴灌二维土壤水与作物生长耦合模拟模型率定与验证

Calibration and Validation of Two-dimensional Soil Water Transport and Crop Growth Coupling Model under Mulched Drip Irrigation for Cotton

通过新疆地区棉花膜下滴灌田间试验，获得土壤水分动态、作物生长指标、产量等数据以率定和验证二维土壤水与作物生长耦舍模拟模型。结果表明，基于二维土壤水与作物生长耦合模拟模型，土壤含水率模拟值与实测值的RMSE为0．018～0．059cm＾3／cm＾3。，一致性指数为0．504～0．990；叶面积指数、株高和地上部分干物质量预测值与实测值的RMSE分别为0．26～O．51、1．08～1．82cm和1032～1312kg／hm＾2；棉花籽棉产量模拟值与实测值的差异为1．2％～9．0％。二维土壤水与作物生长耦合模拟模型可用于预测棉花膜下滴灌条件下土壤水分运动和作物生长过程。

In this study, a two-dimensional soil water transport and crop growth coupling model was calibrated and validated by soil water dynamic, crop growth indices and cotton yield obtained through field experiments under mulched drip irrigation for cotton in Xinjiang Uygur Autonomous Region. The results showed that RMSE changed from 0. 018 cm^3/cm^3 to 0. 059 cm^3/cm^3 and consistency index changed from 0. 504 to 0. 990 between the predicted values and measured values of soil water content; RMSEs were 0.26-0.51,1.08-1.82 cm, 1 032-1 312 kg/hm^2 between the predicted values and measured values of leaf area index, crop height and aboveground plant biomass, respectively. The difference ranged from 1.2% to 9.0% between the predicted values and measured values of seeded cotton yield. The two-dimensional soil water transport and crop growth coupling model could be used to simulate soil water dynamics and crop growth processes under mulched drip irrigation for cotton in Xinjiang.