四川盆周山地5种典型林分的空间结构对比分析  

A comparative analysis of spatial structure of five typical forests in mountainous areas of Sichuan basin

作　　者：王伟平 王玉杰 李绍才[1] 孙海龙[2] 马瑞 张磊[1] 杨皓 李桾溢 缪宁[1] WANG Weiping;WANG Yujie;LI Shaocai;SUN Hailong;MA Rui;ZHANG Lei;YANG Hao;LI Junyi;MIAO Ning(Key Laboratory of Bio-resource and Eco-environment of Ministry of Education,College of Life Sciences,Sichuan University,Chengdu 610065,Sichuan,China;State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,Sichuan,China)

机构地区：[1]四川大学生命科学学院,生物资源和生态环境重点实验室,四川成都610065 [2]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《中南林业科技大学学报》2020年第2期43-53,共11页Journal of Central South University of Forestry & Technology

基　　金：国家重点研究计划项目(2016YFD0600203)

摘　　要：【目的】研究四川盆周山地5种典型林分空间结构的特征,为该地区森林结构化经营提供理论依据。【方法】以四川盆周山地同龄的杉木纯林、柳杉纯林、杉木-柳杉混交林及同一时期形成的人天混交林和天然次生林为研究对象,采用角尺度、混交度、大小比数和林分空间结构指数对其空间结构进行分析。【结果】1)杉木纯林、杉木-柳杉混交林、人工天然混交林和天然次生林的水平分布格局为随机分布,平均角尺度分别为0.485、0.478、0.478、0.481,柳杉纯林为均匀分布,平均角尺度为0.455。2)5种林分的大小比数频率分布比较均匀,平均大小比数分别为0.465、0.529、0.446、0.810和0.534,林分整体为中庸生长状态。3)在混交度研究中,杉木纯林和柳杉纯林以零度混交为主,平均混交度分别为0.227和0.020;杉木-柳杉混交林的平均混交度为0.460,林分整体为中度混交;人工天然混交林和天然次生林平均混交度为0.610和0.674,为强度混交。4)引入林分空间结构指数FSSI,综合分析3种林分空间结构参数,FSSI大小排序为:天然次生林>人工天然混交林>杉木-柳杉混交林>杉木纯林>柳杉纯林,其排序与林分混交度排序结果一致。【结论】该地区5种典型林分空间结构的大小比数和角尺度相差不大,林分空间结构主要受混交度的影响。【Objective】In order to provide theoretical basis for managing the forest structure in the Sichuan basin,the spatial structure characteristics of five typical forest stands were studied in mountainous areas around the Sichuan basin.【Method】Four structure parameters(mingling degree,neighborhood comparison,uniform angle index,and stand spatial structure parameter)were used to analyze the characteristics of stand spatial structure.【Result】1)Distribution patterns of Cunninghamia.lanceolate plantation,Cunninghamia.lanceolate-Cyptomeria.fortunei mixed plantation,artificial-natural mixed forest,and natural secondary forest were all randomly distributed.The average uniform angle indexwere 0.485,0.478,0.478 and 0.481,respectively.The Cryptomeria.fortunei plantation was evenly distributed,and the average uniform angle index was 0.455.2)The distribution frequency of neighborhood comparison values of the five typical forests was distributed uniformly.The average neighborhood comparison were 0.465,0.529,0.446,0.810 and 0.534,indicating the stand growth was mainly belonging to medium state.3)The mingling degree of Cu.lanceolate plantation and Cr.fortunei plantation was mainly zero mixture,average mingling degree were 0.227 and 0.020,respectively.Average mingling degree of Cu.lanceolate-Cr.fortunei mixed plantation was 0.460,whole forest was moderate mixture.Artificial-natural mixed forest and natural broad-leaved secondary forest were intensive mixture,and the average mingling degree were 0.610 and 0.674,respectively.4)The spatial structure index of forest stands(FSSI)was introduced to analyze the three spatial structure parameters of forests.The FSSI ranked as:natural broad-leaved secondary forest>artificial-natural mixed forest>Cu.lanceolate-Cr.fortunei mixed plantation>Cu.lanceolate plantation>Cr.fortunei plantation,its ranking was consistent with the results of mingling degree.【Conclusion】The spatial structure of five typical forest stands is mainly affected by the mingling degreein the case where the neighb

关 键 词：四川盆周山地 林分类型 角尺度 混角度 大小比数 林分空间结构指数 

分 类 号：S718.54[农业科学—林学]