摘要
以小陇山龙门林场天然阔叶林为研究对象,利用角尺度、混交度和大小比数3种空间结构参数分析其空间结构特征。结果表明:林分角尺度为0.497～0.523,其空间分布格局为随机偏弱聚集分布;混交度为0.618～0.760,林木个体种间结构属中强度混交;大小比数为0.490～0.503,林木空间大小对比上,除日本落叶松呈明显优势,山合欢明显受压外,其余树种大小比数总体分布均匀,即有优势树种也有受压树种。
The natural broad-leaved forest in Longmen Forest Farm of Xiaolong Mountain was taken as the research object.The spatial structure characteristics were analyzed by three spatial structure parameters:angular scale,mixed degree and size ratio.Result shows that the angular scale of the stands is0.497-0.523,and the spatial distri-bution pattern is randomly weakly distributed.The degree of mixture is0.618-0.760.The interspecies structure of the trees belongs to the medium intensity mixed;the size ratio is0.190-0.503,from the aspect of the size of the for-est space,Pinus jnassoniana has obvious advantages,and Albiza kalkora is obviously under pressure.The other trees are evenly distributed in size,that is,there are dominant trees and stressed trees.
作者
徐晓林
Xu Xiaolin(Longmen Forest Farm, Xiaolongshan Forestry Experimental Bureau,Gansu Province,Tianshui 741020,China)
出处
《防护林科技》
2018年第12期16-18,共3页
Protection Forest Science and Technology
关键词
天然阔叶林
空间结构
参数分析
小陇山
natural broad-leaved forest
spatial structure
parameter analysis
Xiaolong Mountain
