杉—阔林间边缘效应与杉木林龄的相关性研究  

Edge effect between Cunninghamia lanceolata forest and broadleaf trees forest,and age-related of Cunninghamia lanceolata

作　　者：马文俊[1] 李际平[1] 李建军[1] 郑柳[1] 

机构地区：[1]中南林业科技大学研究生部,湖南长沙410004

出　　处：《中南林业科技大学学报》2011年第7期75-79,共5页Journal of Central South University of Forestry & Technology

基　　金：国家自然科学基金项目(30972362;31070568);湖南省自然科学基金重点项目(10JJ2020)

摘　　要：运用Shannon-Wiener物种多样性指数、Simpson生态优势度指数和边缘效应强度指数,对桃源县的10组不同龄级杉木林与阔叶林间的边缘效应进行研究,并对杉木林生长情况和蓄积量变化情况进行了分析。结果表明:杉木幼龄林、中龄林及成熟林与阔叶林间的边缘效应均有增大物种多样性的趋势;随着杉木林龄的增大,灌木层、草本层边缘效应强度ED表现出不同的变化趋势;边缘效应对杉木幼龄林和中龄林的平均胸径、平均树高以及蓄积量均有增大的趋势,而杉木成熟林的变化却不明显。The edge effects between 10 groups of different age-graded Cunninghamia lanceolata forest and broadleaf trees forest were studied by using Shannon-Wiener index, Simpson ecology dominance index and the index of edge effect. At the same time, we analyzed the growth and the volume changes of the Cunninghamia lanceolata forest were analyzed. The results indicate that： no matter which stage Cunninghamia lanceolata forest stayed （young, half-mature or mature）, the edge effect between Cunninghamia lanceolata and broadleaf trees had a tendency to increase species diversity; with the stand age of Cunningharnia lanceolata increasing, the edge effect intensity ED about shrub and herb showed different changing trend. The edge effect can increase the average DBH of young Cunninghamia lanceolata forest and middle-aged forest, as well as the average height and volume, but had no significance effect on mature Cunninghamia lanceolata forest.

关 键 词：边缘效应 物种多样性 生态优势度 蓄积 

分 类 号：S791.27[农业科学—林木遗传育种]