滇中云南松天然林空间结构特征  

Spatial Structure of Pinus yunnanensis Forest in Central Yunnan Plateau

作　　者：袁凤军[1] 崔凯[2] 廖声熙[2] 喻景深[2] 张鹏[2] 崔永忠[2] 王小庆[2] 

机构地区：[1]云南省林业调查规划院,云南昆明650051 [2]中国林业科学研究院资源昆虫研究所,云南昆明650224

出　　处：《西南农业学报》2013年第3期1223-1226,共4页Southwest China Journal of Agricultural Sciences

基　　金：引进国际先进林业科学技术项目"林分综合经营动态规划技术引进(2012-4-71)";"十二五"农村领域国家科技计划课题"云南松二代育种技术研究与示范(2012BAD01B0203)"

摘　　要：利用混交度、大小比数和角尺度3个林分空间结构参数,分析了滇中云南松天然林的空间结构特征。结果表明:滇中云南松林平均混交度仅为0.034,林分混交程度极低,主要为云南松纯林,仅见少许其他乔木树种分布;该林分林木大小分化程度较为均匀,大小比数平均值为0.494,不同径级云南松间竞争较为激烈;云南松林林分的空间分布格局为随机分布,林分角尺度平均值为0.449,角尺度为0.5的株数比例为55.2%。综上可见,云南松林树种结构较为单一,林分稳定性较差,且林木间竞争较为激烈,亟待进行抚育间伐措施改善林分空间结构,提高林分质量。Using the mingling degree,neighborhood comparison and uniform angle index,the spatial structural characteristics of Pinus yunnanensis forest were analyzed in the central Yunnan plateau.The results showed that the average mingling degree of the forest was 0.034,suggesting the low mingling degree of stands.The dominant species was mainly Pinus yunnanensis,while the advantages of other populations were not obvious.In the spatial structural units,the proportion of dominant,sub-dominant,intermediate,inferior and absolute inferior trees was 19.0 %,20.0 %,21.1 %,21.5 %,and 17.6 %,.respectively.The average neighborhood comparison was 0.494,suggesting the intense competition of Pinus yunnanensis in different diameter chass.The spatial pattern of the stands was of random distribution,with 0.449 in the average uniform angle index.The proportion of 0.5 in uniform angle index was 55.2 %.In a word,this Pinus yunnanensi forest was single species structure;poor stand stability and intense competition.So,intermediate cutting should be used in the Pinus yunnanensis forest to improve the stand spatial structure and quality.

关 键 词：滇中高原 云南松林 空间结构 混交度 大小比数 角尺度 

分 类 号：S718.45[农业科学—林学]