贵阳市长坡岭林场次生林林分空间结构分析

摘要

In July 2017, two sample plots of 60 m × 50 m were established at secondary forest in Changpoling Forest Farm, Guizhou province for analysis of spatial structure by mingling degree, neighborhood pattern and comparison. The result demonstrated that arbor layer was mainly composed by 13 species, such as Celtis sinensis,Bothrocaryum controversum,Ligustrum lucidum,etc.Analysis on mingling degree indicated that the two sample plots were intensively mixed with few same species neighboring. Mean neighborhood pattern was 0.475-0.517, indicating random distribution. The neighborhood comparison an different level of the stand was uniform, meaning middle state.%2017年7月,在贵阳长坡岭林场次生林,选择典型地段设置2个60 m×50 m的样地,运用混交度、角尺度和大小比数3种林分空间结构参数对林分的空间结构进行分析.结果表明:(1)林场林分乔木层主要由13种树种组成;朴树Celtis sinensis,灯台树Bothrocaryum controversum,女贞Ligustrum lucidum,刺槐Robinia pseudoacacia,亮叶桦Betula luminifera,红麸杨Rhus punjabensis var.Sinica,白栎Quercus fabri,梓Catalpa ovata,山桐子Idesia polycarpa,盐肤木Rhus chinensis,山樱花Cerasus serrulata,椤木石楠Photinia bodinieri,刺楸Kalopanax septemlobus等;(2)林分各混交类型所占的比例呈逐渐上升的趋势,林分整体呈强度混交状态;(3)林分的平均角尺度在0.475~0.517范围,林木整体水平分布格局为随机分布;(4)林分大小比数在不同等级的分布比较均匀,整体上接近于中庸状态.