夏玉米蒸发蒸腾及与土壤含水率、叶面积指数关系研究  

Summer Corn Evapotranspiration and Its Relation with Soil Moisture Content and LAI in Huaibei Plain

作　　者：袁宏伟[1] 蒋尚明[1] 汤广民[1] 袁先江[1] 

机构地区：[1]安徽省水利部淮委水利科学研究院水利水资源安徽省重点实验室,安徽蚌埠233000

出　　处：《节水灌溉》2015年第7期40-42,共3页Water Saving Irrigation

基　　金：国家自然科学基金项目(51409002;71273081)

摘　　要：利用大型称重式蒸渗仪测定夏玉米不同生育期的农田蒸发蒸腾,分析了夏玉米的蒸发蒸腾变化规律,探讨了参考作物蒸发蒸腾量ET0、土壤含水率及叶面积指数LAI与作物蒸发蒸腾量ET之间的关系。结果表明：ET0和蒸渗仪实测的ET生育期内变化趋势基本一致;夏玉米ET受0~60cm土层土壤含水率的影响,尤其是0~40cm土层土壤含水率对作物ET影响显著,80cm以下土层土壤含水率基本对作物ET无明显影响;ET与LAI变化趋势在拔节期后期以后基本一致,苗期~拔节期中期无明显关系。With the data of summer corn evapotranspiration of different growth period determined by large-scale weighing Lysimeter, this research analyzed the law of summer corn evapotranspiration, and discusses the correlation between reference crop evapotranspiration（ET0）, soil moisture content and evapotranspiration （ET）. The resuhs show that the variation trends of ETo and ET（measured by large-scale weighing lysimeter） are consistent; ET is affected by soil moisture content in 0--60 cm soil layer, especially in 0-40 cm soil layer; the soil moisture content below 80 cm soil layer has no significant effect on ET; the level of ET and the level of LAI have no obviously relationship in seedling stage to middle jointing stage, but the variation trends of ET and LAI are consistent after the late jointing stage.

关 键 词：淮北平原 夏玉米 蒸发蒸腾量 蒸渗仪 土壤含水率 叶面积指数 

分 类 号：S274[农业科学—农业水土工程]