西藏自治区立木材积非线性联立模型的研究  

A Study on Nonlinear Dependently Estimated Tree Volume Model System f or Tibet

作　　者：贺东北[1] 

机构地区：[1]国家林业局中南院,湖南长沙410014

出　　处：《中南林业调查规划》2003年第2期14-16,20,共4页Central South Forest Inventory and Planning

摘　　要：采用典型抽样 ,选取以高山栎为主的栎类乔木树种 1 5 0株样木和除栎类、桦木类以外的阔叶类乔木树种 1 81株样木 ,建立了西藏自治区栎类和阔叶树的树干、树枝和总材积非线性联立模型 ,有效地解决了立木树干、树枝和总材积间的兼容性问题。经检验 ,树干和总材积模型的总相对误差均在± 1 %以内 ,模型预估精度在 96 %以上 ,模型稳定可靠 ,符合生物学客观规律。By using the purposive samples including 150 sampl e trees for oak and 181 for broadleaved species, a nonlinear dependently estimated model system for tree volume, stem volume and branch volume of oak and broadlea ved species in Tibet was established which can make the three volumes compatible . It was tested that the total relative errors of the tree volume and stem volum e estimates based on the system were less than 1%, the precisions of the estimat es were more than 96%, and the model system was stable and liable. The approach is of great significance for the establishment of tree volume model system for o ther species.

关 键 词：西藏 立木材积 非线性联立模型 总材积 树枝材积 树干材积 兼容性 栎类 阔叶树 

分 类 号：S758.3[农业科学—森林经理学]