万人欢林场蒙古栎纯林空间结构特征分析

Spatial Structure Characteristics of Pure Forest of Quercus mongolica in Wanrenhuan Forest Farm

宾县万人欢林场蒙古栎纯林内设立调查样地6个,对林分的树种组成、直径分布和空间结构特征进行了分析研究,结果表明:该林场蒙古栎纯林树种组成较简单,仅5~6种,蒙古栎断面积占林分总断面积的90%以上,直径分布呈近正态分布或近似反"J"形分布,林木空间处于随机分布、均匀分布或团状分布,树种隔离程度总体处于弱度混交状态,林木大小分化程度总体处于中庸状态。

Six investigation sites were set up in pure forests of Quercus mongolica in Wanrenhuan Forest Farm of Binxian County in Heilongjiang Province.The tree species composition,diameter distribution and spatial structure characteristics of forest stand were analyzed.Result shows that the composition of the stand is very simple.There are only 5-6 species,the predominant tree species is Quercus mongolica,and the diameter distribution is nearly normal distribution or approximated to an＂J＂distribution.The forest tree space is randomly distributed,evenly distributed or clustered,and the tree species are generally in weak mixed state.