考虑缺水滞后效应的作物-水模型研究

A Study on Model of Crop response to water in consideration of\=lag effect with limited water deficit

本文依据作物生理学有限缺水理论，考虑作物不同生育阶段缺水对叶面积系数、腾发量变化及产量影响的滞后效应，假设这种滞后影响过程的现在阶段只与将来阶段有关，而将来阶段与过去阶段无关，经单阶段和多阶段缺水的两种田间灌溉试验，求得改进的加法模型即考虑缺水滞后效应的作物水模型（ＬＥＭＣＲＷ），与常见的３种国外ＭＣＲＷ比较具有较广泛的适应性和较好精度，只要正确选用不同的敏感指标，可供单阶段和多阶段缺水对产量影响的非充分灌溉模拟．

Based on the theory of plant physology for limited water deficit,this paper presents the lag effect of water deficit on leaf area indexes,evapotranspiration and yield.The assumption is given that the lag effect at present growth stage is only related to water deficit at post stage.The improved model of crop response to water is obatined through experiment for insufficient irrigation.It can simulate yield related to water deficit at single or multistage.