塞罕坝地区华北落叶松人工林对降雨的截留分配效应  

Redistribution Effects of Tree Canopy of Larix principis-rupprechtii Plantation on Precipitation in the Upper Stream of Saihanba Area

作　　者：刘春延[1] 李良[2] 赵秀海[3] 翟洪波[4] 呼和牧仁[2] 

机构地区：[1]北京林业大学博士后流动站,北京100083 [2]内蒙古农业大学生态环境学院,内蒙古呼和浩特010018 [3]北京林业大学林学院,北京100083 [4]国家林业局调查规划设计院,北京100714

出　　处：《西北林学院学报》2011年第3期1-5,共5页Journal of Northwest Forestry University

基　　金：国家林业局重点科研项目"半干旱地区华北落叶松人工林可持续经营技术应用开发与试验示范"(2008-02)

摘　　要：2009年5-10月,对河北省塞罕坝地区32 a生华北落叶松人工林的降雨及其林冠截留分配效应进行了观测。结果表明:观测期总降雨量为348.4 mm,林冠截留量、穿透降雨量、树干茎流量分别为79.7、266.7、2.0 mm,分别占同期林外降雨量的22.87%、76.56%、0.57%。降雨较多的7月份,林冠截留量、透流量、树干茎流量均较大,但截留率较小;少雨的8-10月份,林冠截留率较大,透流率、树干茎流率相对较小,风对树干茎流的影响较大。华北落叶松人工林林冠截留量、穿透降雨量随林外降雨量呈幂函数、直线函数增加;林冠截留率、穿透降雨率随林外降雨量呈幂函数递减、对数函数增加;树干茎流量、茎流率随林外降雨量均呈直线函数增加;降雨强度对各分量的影响不明显。From May to October of 2009, the Larix principis rupprechtii plantation which was 32 years old was observed to study the rainfall and its redistribution by L. principis-rupprechtii through test plot in Saihanba area of Hebei. The results showed that the rainfall was 348.4 mm in observing period, the canopy interception, throughfall, stemflow of the forest were 79.68 ram, 266.74 ram, and 1.98 mm respectively. The rates of canopy interception, throughfall, stemflow were 22. 87%, 76. 56%, and 0.57% respectively. In the rainy month of July, the interception, throughfall and stemflow were greater, but the rate of canopy interception was smaller; In the dry month of Auguse to October, the rate of canopy inter- ception was higher than throughfall rate and stemflow rate, the wind made a great impact on stemflow. The relationship between interception, throughfall and rainfal were power and linear functions. The rela- tionship between interception rate, throughfall rate and rainfal were power and logarithmic functions. The relationship between stemflow, stemflow rate and rainfal were linear function. The influence of rainfall in- tensity was not obvious.

关 键 词：华北落叶松人工林 林冠截留 穿透降雨 树干茎流 

分 类 号：S718.512[农业科学—林学]