杉木人工林林分空间结构分析及综合指数评价  

Spatial Structure Analysis and Comprehensive Index Evaluation of Fir Plantation Stands

作　　者：张俊鹏 徐钊 温小荣[1,2] 汪求来 叶金盛 ZHANG Junpeng;XU Zhao;WEN Xiaorong;WANG Qiulai;YE Jinsheng(Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Faculty of Forestry,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Jiangsu Provincial Forest Resources Monitoring Center,Nanjing 210036,Jangsu,China;Guangdong Forestry Survey and Planning Institute,Guangzhou 510520,Guangdong,China)

机构地区：[1]南京林业大学南方现代林业协同创新中心,江苏南京210037 [2]南京林业大学林学院,江苏南京210037 [3]江苏省森林资源监测中心,江苏南京210036 [4]广东省林业调查规划院,广东广州510520

出　　处：《西北林学院学报》2024年第6期10-16,共7页Journal of Northwest Forestry University

基　　金：广东省林业科技创新项目(2021KJCX001);国家重点研发计划(2016YFC0502704);江苏高校优势学科建设工程资助项目(PAPD)。

摘　　要：基于广东省羊角山林场、连山林场和金鸡林场9个杉木人工林样地的实测数据,对杉木人工林林分空间结构参数进行评价和分析,为优化和调整杉木人工林的林分空间结构奠定基础。采用角尺度、混交度、大小比数、开敞度和竞争指数5个林分空间结构参数,分析不同龄组(幼龄林、中龄林、近成熟林)以及不同密度(1 700、2 000、2 300株/hm^(2))杉木林林分空间结构特征,通过熵权法构建林分空间结构综合指数。结果表明,9个样地的杉木林各龄组的角尺度处于均匀分布和随机分布状态之间;林分混交度普遍较低;杉木各龄组的大小比数都接近中庸状态,林木分化水平较低;开敞度在不同龄组间差异显著;竞争指数在3个龄级之间呈极小幅度的波动;不同龄组的林分空间结构理想程度为:中龄林>近成熟林>幼龄林;不同密度的林分空间结构理想程度为:低密度>中密度>高密度。以样地林分空间结构分析与评价为依据,采取合理的营林措施,可以使杉木人工林的林分水平分布格局逐渐趋向随机分布,混交状态逐渐趋向最高混交,林分竞争状态逐渐趋向优势态竞争,从而促进其可持续经营。Based on the measured data of 9 Chinese fir plantation plots in Yangjiao Forest Farm,Lianshan Forest Farm and Jinji Forest Farm in Guangdong Province,the stand spatial structure parameters of Chinese fir plantation were evaluated and analyzed to lay a foundation for optimizing and adjusting the stand spatial structure of Chinese fir plantation.In this study,five stand spatial structure parameters,including angular scale,mixing degree,size ratio,openness and competition index,were used to analyze the spatial structure characteristics of Chinese fir stands of different age groups(young forest,middle-aged forest,near mature forest)and different densities(1700,2000,2300 trees/hm^(2)).The comprehensive index of stand spatial structure was constructed by entropy weight method.The results showed that the angular scale of each age group of Chinese fir forest in 9 plots was between uniform distribution and random distribution.The mixed degree of stand was generally low.The size ratio of each age group was close to the mean state,and the tree differentiation was in low level.There were significant differences in openness among different age groups.The competition index fluctuated very little among the three age classes.The ideal stand spatial structure among different age groups should be middle-aged forest near mature forest>young forest Among different desity stands,the ideal structure shoul be low density stands>medium density>high density stands.Based on the analysis and evaluation of the spatial structure of the stand of the sample plot,reasonable measures should be taken to make the distribution pattern of the stand of Chinese fir plantation gradually tend to random distribution,the mixed state gradually to the highest mixed state,and the stand competition gradually to the dominant state,so as to promote its sustainable management.

关 键 词：杉木人工林 林分空间结构 熵权法 林分空间结构综合指数 

分 类 号：S711.8[农业科学—林学]