【摘要】 山杨是华北地区主要用材树种之一 ,因此 ,对于营林工作 ,编制该树种的地位指数表是一项很重要的基础性工作 .该文使用 2 5 7块山杨次生林标准地资料 ,在分析林分龄级结构和优势树高与年龄关系的基础上 ,采用树高生长与年龄关系的数学模型 ,编制出山杨次生林地位指数表 .提出了山杨次生林立地质量的评价方法 .更多还原

【Abstract】 Poplar(Populus davidiana)is a major timber species in north China. It is more important to make the site index table in forest management. In this paper stand age class distribution and the relationship between height of dominant trees and age are analysed with data of 257 sample plots of secondary poplar forest. Based on which the site index table was constructed by means of the generalized mathematical model of age and height growth. The method was made to assess site quality of secondary poplar forest.更多还原