三元地区毛竹林分空间结构分析  

The Forest Stand Spatial Structure of Phyllostachys heterocycla in Sanyuan

作　　者：李展[1] 宋丁全[2] 王福升[3] 关庆伟[1] 邓巍 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037 [2]金陵科技学院,江苏南京211169 [3]南京林业大学竹类研究所,江苏南京210037 [4]福建省三明市三元区中村林业站,福建三明365008

出　　处：《金陵科技学院学报》2010年第3期63-67,共5页Journal of Jinling Institute of Technology

基　　金：国家十一五科技支撑项目(2006DAD19B02)

摘　　要：以福建三元地区毛竹林为研究对象,利用角尺度、混交度和大小比数3个结构参数并结合树种组成,分析了该地区毛竹林的空间结构。结果表明:毛竹林分树种混交度以弱度混交为主,树种的平均混交度为0.29,说明毛竹林的树种空间配置简单,林分中树种混交程度较低;林木的大小比数分布存在波动性变化,林分中处于优势状态的个体所占比例较大,亚优势、中庸、劣势和绝对劣势的林木个体比例相差不大,说明树种稳定性不高。在角尺度研究中,相对空间结构单元而言,个别林木分布频度变化幅度较大,分布格局呈集群分布。The stand spatial structure of moso bamboo （Phyllostachys heterocycla） forest in Sanyuan areas was investigated using three structure parameters （mingling, neighborhood comparison, and uniform angle index-neighboring tree distribution pattern）. The results showed that the average mingling degree was mainly weak（Mi=0. 25）, and the mean value was 0.29, indicating the simple spatial allocation and poor mixing of different tree species in this plantation. The distribution of neighborhood comparison changed with a fluctuant pattern, and the proportions of the forest stand in sub-dominant, middle, inferior and absolutely inferior states showed little difference, so the stability of species in the arborous layer was not good. As for uniform angle index, in the spatial structure units, the frequency of some individual trees changed in a relatively large range and the forest plantation resented a gathering distribution pattern.

关 键 词：毛竹 空间结构 混交度 大小比数 角尺度 

分 类 号：S795.7[农业科学—林木遗传育种]