靖州排牙山国有林场森林自然度评价  

Evaluation of forest naturalness of Paiya mountain state-owned forest farm,Jingzhou Miao in Dong Autonomous County

作　　者：杨培松 陈彩虹[1] 佘济云[1] 唐子朝 YANG Peisong;CHEN Caihong;SHE Jiyun;TANG Zichao(School of Forestry,Central South University of Forestry and Technology,Changsha 410004,Hunan,China)

机构地区：[1]中南林业科技大学林学院,湖南长沙410004

出　　处：《中南林业科技大学学报》2022年第5期19-32,共14页Journal of Central South University of Forestry & Technology

基　　金：湖南省教育厅重点科研项目(104-4243)。

摘　　要：【目的】对靖州排牙山国有林场的森林进行自然度评价,以期为林场的多功能经营提供理论依据。【方法】采用定量与定性相结合的森林自然度评价方法,对靖州排牙山国有林场进行自然度评价。首先构建评价指标体系,利用主成分分析法筛选评价指标,提取出累计方差贡献率达到73%以上的主成分,同时选取载荷因子大于0.6的指标作为研究森林自然度的评价指标;其次用客观赋权的熵值法确定指标的权重,通过R语言软件计算出各个评价指标的权重;最后结合综合评价指数计算出各样地的自然度指数。根据样地的自然度指数进行等级划分,分为“人工、近人工、远自然、半自然、近自然”5个等级。【结果】在靖州排牙山国有林场的155个样地中,自然度处于“人工”等级的样地有26个,占比16.77%;“近人工”等级的样地有49个,占比31.61%;“远自然”等级的样地有64个,占比41.29%;“半自然”等级的样地有7个,占比4.52%;“近自然”等级的样地有9个,占比5.81%。林场共有25个林班,各林班自然度等级划分结果为:“人工”等级的林班有3个,“近人工”等级的林班有8个,“远自然”等级的林班有12个,“半自然”等级的林班有1个,“近自然”等级的林班为1个。【结论】林场的自然度等级为“远自然”;林场人工林的自然度等级主要集中在“远自然”“近人工”“人工”3个等级,说明林场森林经营程度比较高,并且经营效果也比较好;森林的龄组结构分布均匀,近熟林占比最高,森林现状健康有活力。【Objective】Forest naturalness evaluation is of great significance to forest management and regionalization.This study evaluated the forest naturalness of Paiya mountain state-owned forest farm in Jingzhou Miao in Dong Autonomous County,to provide a theoretical basis for the multi-functional management of forest farms.【Method】In this study,a quantitative forest naturalness assessment method was used.Firstly,an assessment index system was introduced,and the assessment indexes were selected by principal component analysis(PCA).The principal components whose cumulative variance contribution rate was above 73%were extracted,at the same time,load factors greater than 0.6 were selected as the evaluation index of forest naturalness.Then the weight of the index was determined by the entropy method,and the weight of each evaluation index was calculated by the R language software.Finally,the naturalness value of each plot was calculated by Comprehensive Evaluation Index,and the plots were divided into five grades:artificial,near artificial,far natural,semi natural and near natural plots.【Result】Among the 155 sample plots on the forest farm,there were 26 plots with“Artificial”degree of naturalness(16.77%),and 49 plots with“Near artificial”degree of naturalness(31.61%),there were 64 sample plots with“Far nature”degree,accounting for 41.29%,7 sample plots with“Semi-nature”degree,accounting for 4.52%,and 9 sample plots with“Near nature”degree,accounting for 5.81%.There were 25 forest classes on the forest farm.The results of natural degree classification of each forest class were as follows:there were 3 forest classes of the“Artificial”grade,8 forest classes of the“Near artificial”grade and 12 forest classes of the“Far natural”grade,1 forest class of the“Semi-natural”level,1 forest class of the“Nearnatural”level.【Conclusion】Generally,the natural degree of the forest farm is“Far from nature”,and the natural degree of the artificial forest on the forest farm is mainly co

关 键 词：森林自然度 主成分分析法 熵值法 自然度综合指数 

分 类 号：S757.44[农业科学—森林经理学]