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依据CROPWAT模型结合田间补灌试验资料,采用作物水分响应模型研究辽西半干旱区玉米生育期产量与水分的关系。结果表明:不同生育期水分影响玉米产量依次为灌浆期>开花期>拔节期;实现玉米高产应选择的补灌时期以拔节期+开花期+灌浆期组合为佳,补灌定额为135mm;实现水分高效利用则选择开花期+灌浆期补灌,灌水定额为90mm。
Based on the CROPWAT model combined with field irrigation experiment data, the relationship between crop yield and water content during the growth of maize in the semiarid areas of western Liaoning was studied by using crop water response model. The results showed that the effects of moisture on the yield of maize at different growth stages were as follows: filling stage> flowering stage> jointing stage; the combination of jointing stage + flowering stage + Efficient use of water is the choice of filling flowering stage + fill irrigation, irrigation quota of 90mm.