三峡库区防护林树种枝叶容水量与蒸发速率研究

Water Capacity and Evaporating Speed of Branches and Leaves of the Multifunctional Protection Forest in the Three Groges Reservoir Area of Western Hubie

在调查研究鄂西三峡库区多功能防护林类型及树种的基础上 ,采用称重法 ,研究了各树种的枝叶容水量和蒸发速率 ,并由此预测了主要防护林林分的林冠截留 .结果表明 :1树枝叶重与枝条基部直径呈线性正比关系 ;2树枝叶容水量与枝叶重呈线性正比关系 ;3水湿树枝叶表面水分完全蒸发所需的时间与空气相对湿度呈递增指数函数关系 ,与气温呈递减指数函数关系 。

Based on the investigation of the multifunctional protection forest type and tree species in the three gorges reservoir area of western Hubei,the water capacity and evaporating speed of branches and leaves were researched.By means of weighing, the rainfall interception by canopy of different protection forest stands were also predicted.The results show that:①The weight of branches and leaves is linear correlated to the diameter of its stem;②The water capacity and evaproating speed of branches and leaves of linear positively correlated with its weight;③The drying time of wetting branches and leaves has an increasing exponential function correlation with air relative humidity and a decreasing correlation with atmospheric temperature,and relative humidity is the main effecting factor to it.