马占相思人工林的林冠截留效应  

Canopy interception effects of Acacia magium plantation

作　　者：李汉强 邱治军[2] 张宁南[2] 徐大平[2] 周光益[2] 

机构地区：[1]广东省西江林业局林业科学研究所,广东高要526108 [2]中国林业科学研究院热带林业研究所,广东广州510520

出　　处：《中南林业科技大学学报》2013年第2期86-90,共5页Journal of Central South University of Forestry & Technology

基　　金：科技部社会公益研究专项(2003DIB3J116);广东省自然科学基金项目(0113931)

摘　　要：2006、2007年对位于高要市高要林场的马占相思人工林的穿透雨、树干流进行了监测,结合大气降雨数据,分析了马占相思人工林对降雨的截留分配效应。结果表明:(1)高要林场2006、2007年降雨量分别为1767.1 mm和1 692.7 mm,降雨主要集中在雨季的4～9月份,其降雨量分别占2006、2007年降雨量的81.7%和84.5%;(2)马占相思人工林的穿透雨、树干流与降雨量呈线性关系,林冠截留量、穿透雨率、树干流率与降雨量呈对数曲线关系;截留率与降雨量呈乘幂指数曲线关系;(3)马占相思人工林的年平均穿透雨率、树干流率和林冠截留率分别为84.2%、7.3%、8.5%;由于降雨和林冠层的季节性变化,林冠截留效应存在明显的季节性差异,雨季的林冠截留率为8.5%,旱季为17.9%;(4)马占相思的穿透雨率高于相邻的鼎湖山常绿阔叶林,林冠截留率低于常绿阔叶林,这有利于增加马占相思林内净雨量,提高系统水资源量。Through-fall,stem flow and rainfall of Acacia mangium plantation in Gaoyao Forest Farm were measured from 2006 to 2007,and the characteristics of canopy interception were analyzed.The results indicate that the annual rainfall of Gaoyao Forest Farm was 1 767.1 mm in 2006,and 1 692.7 mm in 2007.The rainfall mainly occurred in April to September,with its proportion of 81.7% to annual rainfall of 2006,and 84.5% to annual rainfall of 2007 respectively.The through-fall and stem flow had a linear relationship to rainfall.But the canopy interception,through-fall rate and stem flow rate had a logarithm relationship to rainfall.The relationship between interception rate and rainfall was a power curve function.Annual mean through-fall rate,stem flow rate and interception rate were 84.2%,7.3%,and 8.5% respectively.Canopy interception effect had notable season changes due to the difference of rainfall and canopy characteristic,with the canopy interception rate of 8.5% in rain season,and 17.9% in dry season.Compared to the adjacent evergreen broad-leaved forest of Dinghushan,A.mangium plantation had higher through-fall rate and lower canopy interception rate,which was beneficial to increase net rain and water resources of forest system.

关 键 词：马占相思 林冠截留 穿透雨 树干流 

分 类 号：S715.2[农业科学—林学]