人工杉木林林分空间结构参数分析及相关性研究  

Analysis and correlation study on spatial structure parameters of artificial Cunninghamia lanceolata forest stand

作　　者：赖敏华 赖日文[1] 胡仁杰 叶伟 LAI Minhua;LAI Riwen;HU Renjie;YE Wei(School of Forest,Fujian Agriculture and Forestry University,Fuzhou 350002,China;Fujian Forestry Investigation and Design Institute,Fuzhou 350002,China)

机构地区：[1]福建农林大学林学院,福州350002 [2]福建省林业勘察设计院,福州350001

出　　处：《生态科学》2021年第3期58-63,共6页Ecological Science

基　　金：福建农林大学科技创新基金项目(KFA17284A);林学高峰学科建设项目(71201800755)。

摘　　要：基于南平松溪林场九个人工杉木林标准地的实测数据,对人工杉木林林分空间结构参数进行了评价和相关性分析,为制定杉木林和其他纯林林分空间结构优化和调整措施奠定基础。采用n=4确定林木的空间结构单元,用大小比数、角尺度和竞争指数等3个林分空间结构参数分析杉木林的林分空间结构特征。结果表明,9个标准地的杉木林大小比数都接近中庸状态,林木个体差异不大,林木分化不严重;角尺度处于均匀和随机分布状态之间,与水平分布理想模式存在一定差距;竞争指数较为稳定,没有因为年龄的不同而出现大幅度的变动。大小比数U和竞争指数H间为中度相关,大小比数U和角尺度W,以及角尺度W和竞争指数H间几乎不相关。研究结果有助于杉木人工林的可持续经营。Based on the measured data of nine artificial Cunninghamia lanceolata forest standard plots in Songxi Forest Farm of Nanping City,the spatial structure parameters of Cunninghamia lanceolata forest stand were evaluated and analyzed,which laid the foundation for the formulation of spatial structure optimization and adjustment measures of Cunninghamia lanceolata forest and other pure forest stands.Neighbor trees of the object one was determined based on n=4.Three stand spatial structure parameters of neighborhood comparison,uniform angle index and competition index were used to analyze their spatial structure characteristics.The result shows that the neighborhood comparison of the Cunninghamia lanceolata forests in the nine standard plots are close to the mean state,the individual differences of the trees are not large,and the differentiation of the trees is not serious;the uniform angle index is between uniform and random distribution,and there is a certain gap from the ideal model of horizontal distribution;the competition index is relatively stable,and there have been no significant changes due to age.The relationship between the neighborhood comparison and the competition index is moderately correlated,while the correlation between the neighborhood comparison and the uniform angle index,and the uniform angle index and the competition index are almost nonexistent.The results are helpful to the sustainable management of artificial Cunninghamia lanceolata forest.

关 键 词：杉木 大小比数 角尺度 竞争指数 相关性 

分 类 号：S757.3[农业科学—森林经理学]