摘要
通过建立径流场对橡胶林水分平衡各因子进行了2a的连续观测,研究橡胶林降水在林冠和地面的水分分配和各水分分配因子之间的关系。结果表明:穿透水、树干茎流量、林冠截留量分别占年降水量的77.1%、9.6%和13.3%;净降水(包括穿透水和树干茎流)中以地表径流、渗漏方式流失的水分分别占年总降水量的3.0%和23.0%;林冠和土壤中通过蒸散返回大气系统的水分占总降水量的70.4%。
A runoff field(20m×20m)and an infiltration pond(100cm×150cm×150cm)were built in the hilly land of a rubber plantation to observe water distribution from precipitation in the canopy and the surface as well as its re lationship with each water distribution factors.The results showed that the throughfall,stemflow and canopy interception made up of77.1%,9.6%and13.3%of the annual precipitation respectively.The water lost through sur face flow and infiltration out of the net precipitation(including throughfall and stemflow)accounted for3.0%and23.0%of the annual precipitation respectively.The water returned to atmosphere from the canopy and soil by evapotranspiration was70.4%of the annual precipitation.
出处
《热带作物学报》
CSCD
2003年第2期6-10,共5页
Chinese Journal of Tropical Crops
基金
国家自然科学基金资助项目(No.39960035)。
