安徽亳县泡桐立地质量评定

本文在分析林木直径和树高的相关性的基础上,结合平原农区地形地貌特征,以林分内最大径阶木的平均胸高直径代替优势木的平均树高作因变量,以林分平均林龄和土壤种类、土层厚度、地下水位、株距等定性因子作为自变量,分别编制出安徽省亳县泡桐人工林地位指数表和数量化地位指数表,并在此基础上将泡桐人工林划分为14个立地类型。该项研究对于探讨平原农区主要树种有关经营数表的编制方法、立地类型划分和林木生长预估等具有普遍意义。

EVALUATION ON THE SITE QUALITY OF PAULOWNIA IN BO COUNTY ANHUI

Based on the analysis of the correlation between diameter and height of forest trees, in consideration of topographical and geomorphic features on flat farmlands, site index table and quantified site index table of Paulownia plantations are worked out respectively, with average DBH as dependent variable of trees within the highest diameter diameter class replacing average height of dominant trees, and with stand average age and some qualitative factors as independent variables, such as soil type, thicknes of soil layers, underground water level, and tree spacing in the row. Further, Paulownia plantations are divided into 14 site types. The results are universal suitable to the method of related management tables, the dividing of site types and the pre-evaluation of stand growth for main tree species on flat farmlands.