广西速丰桉树人工林二元胸高形数模型研究  

A Study on Form-factor Model of Eucalyptus Plantation in Guangxi

作　　者：岑巨延 黄永 曾伟生[3] 

机构地区：[1]广西区林业勘测设计院,南宁530011 [2]广西区林业局,南宁530022 [3]国家林业局中南林业调查规划设计院,长沙410014

出　　处：《中南林业调查规划》2008年第1期6-10,共5页Central South Forest Inventory and Planning

基　　金：广西"十五"林业科技攻关项目(2002-54)

摘　　要：以广西速生丰产桉树人工林719块样地数据为基础,通过优选模型结构,以模型本身为权函数进行加权最小二乘法求解模型参数,研究建立了速生丰产桉树人工林二元胸高形数模型。经检验,模型用于林分蓄积估计的总相对误差和平均相对误差均在±2.0%以内,小于规定的±3%;模型总体预估精度达99%以上,大于规定的97%;满足林业数表建模要求。Based on the data of 719 sample plots of Eucalyptus plantations in Guangxi, a form-factor model for Eucalyptus plantations is established. The result of goodness test of the model shows that the total relative error and the mean relative error for forest stand volume estimation are between ±2.0 %, less than the permission of ±3 %,and the precision of estimates is up to 99 %, more than the permission of 97 %.

关 键 词：桉树人工林 胸高形数模型 林分蓄积量估计 

分 类 号：S758.62[农业科学—森林经理学]