重庆市四面山不同森林类型林冠的截留作用

 通过对重庆市四面山6种不同森林类型(温性针叶林、暖性针叶林、落叶阔叶林、常绿落叶阔叶混交林、常绿阔叶林、暖性竹林)最大容水量和林冠截留率的测定,研究了不同森林类型林冠截留作用的差异。结果表明:1)温性针叶林和暖性针叶林较其他4种森林类型具有更高的单位面积林冠最大容水量及林冠平均截留率,表现出较强的林冠截留功能;2)影响植物群落林冠最大容水量的主要因素为郁闭度及单位面积枝叶质量,呈正相关关系;3)影响各森林类型林冠截留率的主要因素为降水量、降水强度以及林冠枝叶干燥程度,随降水量或降水强度的增加,不同森林类型的林冠截留能力表现出不同程度的降低;枝叶干燥程度对不同森林类型截留能力的影响也有明显的区别。

Effects of rainfall interception of different forest communities in the Simian Mountain, Chongqing

This paper studies the difference of canopy interception of different forest types by surveying the maximum water holding capacity,interception rate of canopy of 6 different vegetation types,（temperate coniferous forest,warm coniferous forest,deciduous broadleaved forest,evergreen and deciduous broad-leaved mixed forest,evergreen broadleaved forest and warm bamboo forest）in Simian Mountain of Chongqing.Results can be concluded as follows： 1） compared with that of other 4 types of vegetation types,the maximum water holding capacity,interception rate of canopy of temperate coniferous forest and warm coniferous forest is higher,which presents strong function of canopy interception.2） main factors impacting the maximum water holding capacity are canopy density and mass of leaf and branch per unit area,and there is a significant positive correlation between them.3） the main factors that impacts the canopy interception rate are amount and intensity of rainfall and drying degree of leaf and branch of canopy.Dryness of leaf and branch of canopy has obvious effect on canopy interception of different forest types.