印楝人工林对植物多样性的影响  

Influence of Azadirachta indica Plantation upon the Native Plant Diversity in Yuanmou County,Yunnan

作　　者：刘新龙[1] 王瑞波[1] 张燕平[2] 

机构地区：[1]云南大学生态学与地植物学研究所,云南昆明650091 [2]中国林业科学研究院资源昆虫研究所,云南昆明650224

出　　处：《林业科学研究》2004年第2期147-153,共7页Forest Research

基　　金：云南省"十五"攻关项目"印楝农药原料林优质丰产种源试验示范及印楝杀虫剂研制"(2001NG31)

摘　　要：以种植在元谋不同年龄的印楝林为研究对象,对林内的植物群落种类组成进行区系分析,结果表明群落内的植物种类以泛热带分布和全世界分布为主。用Gleason丰富度指数、Simpson和Shannon Weiner多样性指数、Pielou均匀度指数对调查样地多样性进行分析,获得如下结果:(1)生物多样性指数随印楝林盖度的提高而逐渐下降,说明盖度是影响林下植物多样性的主要因子;(2)印楝林对林下植物多样性影响主要通过林荫,印楝盖度<40%时对林下植物多样性影响不明显,而当盖度>40%时,影响明显;(3)印楝林下植物生长好于对照,印楝枯枝落叶对林下植物生长没有抑制作用。Native plant species were studied in the neem(Azadirachta indica) plantation in Yuanmou County of Yunnan by analying the genus areal-types and four diversity indexes (Gleason index,Simpson's diversity index,Shannon-Weiner index and Pielou's evenness index). According to the genus areal-types, the main areal-types were Pantropic and Cosmopolitan , indicating that the tropical component was the most abundant.It was consistant with the climate of the Dry-Hot Valley in Yuanmou County. Four diversity indexes showed the same results: (1)the species richness, diversity indices and evenness declined with the increase of coverage of neem plantation; (2)the number of species and the number of each species were not influenced evidently by the shadow of neem plantation in low coverage(<40%),while this influence was very evident in high coverage(>40%); (3)the growth of other plant species was restrained by the defoliatation and deadwood of neem in the neem plantation, some species grew very well.

关 键 词：印楝 人工林 植物多样性 盖度 种类组成 

分 类 号：S792.33[农业科学—林木遗传育种]