广西一元立木材积表适用性评价  

Applicability Evaluation of One-Way Tree Volume Table in Guangxi

作　　者：潘黄儒 李惺颖 孟想 蔡会德 Pan Huangru;Li Xingying;Meng Xiang;Cai Huide(Guangxi Forest Resources and Environment Monitoring Center,Nanning,Guangxi 530028,China)

机构地区：[1]广西壮族自治区森林资源与生态环境监测中心,广西南宁530028

出　　处：《广西林业科学》2022年第3期422-427,共6页Guangxi Forestry Science

基　　金：广西林业科技项目(桂林科研[2022]第6号,桂林科研[2022ZC]第9号)。

摘　　要：立木材积表是林业调查和森林经营中材积计量最重要的依据。现行广西森林资源调查使用的一元立木材积表是广西林业勘测设计院于1977年依据《全国立木材积表》相应树种的二元材积式导算而得,随时间推移及森林经营水平提升,有必要对其适用性进行评价。收集广西第九次森林资源连续清查样地平均木调查的树种实测胸径与树高资料,分树种建立林分总体平均高模型,并由一元材积和二元材积方程式导算出编表初期(1977年)的理论树高-胸径曲线,定量分析1977年与2015年相应树种的树高变化;建立不同树种的一元材积与二元材积回归模型,采用F检验和总相对误差作为材积表适用性评价指标。结果表明,不同树种林分总体平均高均变化明显,实际平均高均高于理论平均高10%以上,桉树的差异最大;F检验和总相对误差的结果表明,一元材积模型均没有通过检验,总相对误差均超过±5%的范围,桉树的总相对误差最大。现行一元立木材积表计算的材积明显偏低,建议广西尽快开展数表修编工作。Tree volume table is the most important basis for volume measurement in forestry investigation and forest management.One-way tree volume table,which is currently used in Guangxi forest resources survey,was based on two-way volume equations of corresponding tree species from National Tree Volume Table by Guangxi forestry inventory&planning institute in 1977.With passage of time and improvement of forest management level,it is necessary to evaluate applicability of one-way tree volume table currently used in Guangxi.Actual DBH and tree height data based on the ninth continuous inventory of forest resources in Guangxi were collected and overall average height models of different tree species were created.Theoretical tree height-DBH curve(1977)by combining one-way volume equations and two-way volume equations was calculated.Tree height changes of corresponding tree species in 1977 and 2015 were quantitative analyzed.Regression models of one-way volume and two-way volume of different tree species were established,and F test and the total relative error were selected as indexes of applicability evaluation.Results showed that overall average tree heights of different tree species had obvious changes,and actual average tree heights were more than 10%higher than theoretical average tree heights,especially Eucalyptus spp..Results of F test and total relative error showed that all one-way volume models did not pass test,and all total relative errors overranged from±5%,especially Eucalyptus spp..Volumes calculated according to currently one-way tree volume table were obviously low,so it was suggested that one-way tree volume table which is currently used in Guangxi should be updated as soon as possible.

关 键 词：一元立木材积表 适用性评价 森林资源连续清查 广西 

分 类 号：S758.6[农业科学—森林经理学]