不同土壤水分条件下夏玉米蒸发蒸腾特征研究  

Research on characteristic of summer corn evapotranspiration under different soil moisture condition

作　　者：林同保[1] 孟战赢[1] 曲奕威[1] 

机构地区：[1]河南农业大学农学院/河南省作物生长发育调控重点实验室,河南郑州450002

出　　处：《干旱地区农业研究》2008年第5期22-26,共5页Agricultural Research in the Arid Areas

基　　金：国家"粮食丰产科技工程"资助项目(2006BAD02A07-2)

摘　　要：以郑单958为材料,在防雨测坑模拟试验条件下,研究了不同土壤水分条件下夏玉米蒸发蒸腾特性。试验结果表明:夏玉米在不同土壤水分条件下,土壤蒸发与土壤水分含量有关,干旱条件下土壤蒸发日变化低于适宜土壤水分条件,充足水分条件下土壤蒸发量高于适宜水分处理。蒸腾速率日变化则是适宜水分75%最高,单叶瞬时蒸腾速率比干旱处理和充足水分处理分别高11.8%、4.3%。茎流量日变化峰值随水分含量的增高而增高,其峰值比蒸腾峰值要延迟约2 h。Under the rainproof pit simulation measured test condition,Zheng-Dan 958 was taken as the material to study the evapotranspiration characteristic of summer corn under different soil moisture condition.The result indicated that,under different moisture content condition,there is relationship between soil evaporation and soil moisture,the diurnal change of soil drought treatment is lower than suitable treatment,enough moisture treatment is higher than suitable treatment.75% treatment is the highest transpiration rate diurnal change,and 11.8%、4.3% higher than soil drought treatment and enough moisture treatment.Sap flow diurnal change with soil moisture contentment,its summit is delayed 2 hours to transpiration.

关 键 词：夏玉米 土壤水分 土壤蒸发 叶面蒸腾 茎流 

分 类 号：S513[农业科学—作物学]