基于回归分析的玉米膜下滴灌适宜土壤含水量及阈值研究  

Study on Soil Moisture Content and Threshold of Membrane Under DriPIrrigation for Maize

作　　者：司昌亮[1] 尚学灵 王旭立[1] 张生武[1] 于海荣[1] Si Changliang;Shang xueling;Wang Xuli;Zhang Shengwu;Yu Haitang

机构地区：[1]吉林省水利科学研究院,吉林长春130022

出　　处：《吉林水利》2021年第1期9-12,44,共5页Jilin Water Resources

基　　金：国家重点研发计划课题《旱田高效节水灌溉技术集成应用》(2016YFC0400109);国家科技支撑计划课题《吉林西部节水增粮高效灌溉技术集成研究与规模化示范》(2014BAD12B02)。

摘　　要：为确定半干旱地区膜下滴灌条件下玉米生长与土壤含水量间的关系,利用通榆灌溉试验站2018年度玉米膜下滴灌灌溉制度试验数据,分析不同灌溉制度下的玉米产量,并对不同灌溉制度下的玉米株高、茎粗、叶面积等指标进行回归求解,得到了玉米各生育阶段的适宜土壤含水量及其阈值。玉米膜下滴灌各生育阶段的适宜土壤含水量区间:苗期65%—75%、拔节期70%—80%、抽雄吐丝期75%—85%、灌浆期75%—85%、乳熟期70%—80%;水分胁迫阈值:苗期50%、拔节期57%、抽雄吐丝期66%、灌浆期60%、乳熟期58%。In order to determine the relationshiPbetween maize growth and soil moisture content using membrane under driPirrigation in semi-arid area,the maize yield under different irrigation systems was analyzed by using the experimental data of driPirrigation under membrane in Tongyu Irrigation Experimental Station in 2018.The plant height,stem diameter,leaf area and other indexes of maize under different irrigation systems were solved by regression analysis.The optimal soil moisture content and its threshold of each growth stage of maize were obtained:suitable soil moisture content of membrane under driPirrigation was 65%-75%at seedling stage,70%-80%at jointing stage,75%-85%at silking stage,75%-85%at filling stage and 70%-80%at milky stage respectively.The water stress threshold was 50%at seedling stage,57%at jointing stage,66%at silking stage,60%at filling stage and 58%milky stage respectively.

关 键 词：玉米膜下滴灌 灌溉制度 土壤含水量 阈值 

分 类 号：S513[农业科学—作物学] S275.6