Quantitative research on drought loss sensitivity of summer maize based on AquaCrop model

In this study, the growth periods of summer maize were divided into seedling, booting and flowering-grain stage. Based on simulation results AquaCrop model, drought loss sensitivity in different was analyzed. The curves fitting using soil moisture content effective root zone fixed layer both indicated that stage most sensitive to water stress, which critical period for irrigation, followed by seedling Compared with curve parameters fitted zone, maximum Biomass Loss Rate higher Drought Hazard Index corresponding disaster-causing point turning moved backward. Accordingly, best irrigation opportunity may be missed resulting a large reduction production if an scheme is formulated at based layer. This study also adapted Jensen model calculate normalized coefficient studied response final crop yield deficit periods. showed coefficients stage, 0.251, 0.524, 0.224, respectively, verified rationality feasibility cumulative biomass measure loss.