摘要
采用固定标准地定位观测和临时标准地调查点面结合的方法,运用数量化I统计分析理论,将天然杨桦林的生长条件划分为IV个立地级,以I立地级为最佳。在立地分类的基础上,研究了天然杨桦林各立地级的生长进程,提出了天然杨桦林树高与胸径生长进程的3个阶段:速生期、均稳生长期和慢生长期。这为杨桦林的分类定向培育提供了理论的依据。
Combined oriented observation of permanent sample plots with investigation of temporary sample piots, the growth conditions of poplar - birch natural forests were divided into 4 site classes by using the statistical and analytical theory of quantitative model I , in which the site class I was the best. On the base of this, the growth process of poplar - birch natural forests in different site classes was studied. The growth processes of height and diameter at breast height were divided into three stages: fast growing period, stable growing period, and slow growing period. Results of this study provide a theoretical basis for the oriented cultivation of poplar - birch natural forests.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2005年第5期9-12,共4页
Journal of Northeast Forestry University
基金
国家林业局重点项目"杨桦林分类定向培育技术的研究"的部分内容
项目编号:920303。
关键词
天然杨桦林
立地分类
生长进程
Poplar - birch natural forest
Site classification
Growth process