| By using Jensen model,this paper studies the crop-water model of winter wheat and maize according to the experimental data in the field.The results show that the water-stress sensitivity index(λi) of winter wheat is the largest in jointing stage,the next are booting and heading to early filling stages,while λi is negative during turning green to lifting and late filling stages,during which the proper control of water supply is beneficial to the yield of winter wheat.As to maize,the water-stress sensitivity index(λi) is positive in every stages,showing that water stress in any stage can affect the yield of maize;The most sensitive stage of maize to water stress is heading to initial filling stage.The paper may provide important theoretical evidences for establishing water-saving and high-efficiency irrigation system in the piedmont of MT.Taihang. |