农学学报2025，Vol.15Issue(6)：92-100,9.
辽宁省玉米生长季降水与用水的耦合状况分析
Analysis of Coupling Status Between Precipitation and Water Use During Maize Growing Season in Liaoning Province
摘要
Abstract
To study the water balance during the maize growing season in Liaoning Province based on the meteorological data and crop coefficients in Liaoning Province from 1963 to 2022,the SIMETAW model and climate diagnostic analysis methods were used to analyze the precipitation,water demand patterns,and water satisfaction status during the maize growing season in Liaoning Province.The impact of regional climate change on maize water demand was revealed,and the spatio-temporal evolution of effective precipitation and water demand during the maize growing season in Liaoning Province was studied.The research results showed that the effective precipitation during the whole growth period reached 481.6 mm.Among them,it was 347.4 mm in the west,514.9 mm in the central and southern parts,and 636.8 mm in the east.The average water demand during the whole growth period of maize was 521 mm,showing no significant downward trend.The average coupling degree between precipitation and water demand during the whole growth period of maize was 0.715,that is,precipitation met 71.5%of the water demand,and the average water shortage was 28.5%.The guarantee rate of the coupling degree λ>0.8 in the western region was only 28.3%.The maximum value of the coupling degree appeared in the east of Liaoning Province,followed by the central and southern parts of Liaoning Province,and the minimum value appeared in the west of Liaoning Province.The highest value of the coupling degree appeared during the flowering and pollination period,followed by the trumpet stage,and the lowest value appeared in the early growth stage and the maturity stage.In recent years,the coupling degree between precipitation and water demand in the early growth stage of maize has shown a significant upward trend.The coupling degree between precipitation and water demand in the early growth stage of maize is relatively low.Therefore,it is necessary to pay attention to the occurrence of drought,especially in the western part of Liaoning Province where water resources are scarce.关键词
玉米/参考作物蒸散量/有效降水量/需水量/耦合度/辽宁Key words
maize/reference crop evapotranspiration/effective precipitation/water demand/coupling degree/Liaoning分类
农业科学引用本文复制引用
张黎..辽宁省玉米生长季降水与用水的耦合状况分析[J].农学学报,2025,15(6):92-100,9.基金项目
中国气象局气象探测中心青年科技课题"基于闪烁通量和土壤水分的小麦/玉米作物干旱指标及卫星遥感检验"(MOCQN202108). （MOCQN202108）
