基于作物水分生产函数和胁迫指数的棉花产量估算模式

Cotton yield estimation model based on crop water production function and CWSI

将作物水分胁迫指数(CWSI)与作物水分生产函数相结合,得到了用CWSI表示的作物水分生产 函数,进而推导出基于作物水分生产函数和CWSI的作物产量估算模式。该估算模式利用了易于获取的红外遥感 数据,克服了水分生产函数中作物蒸发蒸腾量准确资料难于获取的限制,并且通过CWSI和作物水分生产函数的 耦合使该估产方法具有一定的物理意义。经大田膜下滴灌棉花实测资料检验表明,该模型计算值的相对误差基本 保持在10％左右。

The crop yield estimation model based on crop water production function ano CWSI was educed by linking CWSI and crop water production function. The above crop yield estimation model got rid of the shortage of precision crop water requirement in crop water production function by using remote sensing data ,and the model is of theoretic significance by coupling CWSI with crop water production function. The experiment results of field drip irrigation cotton under mulch showed the relative error of the model was about 10%.