黄波罗生长变异与早期选择的研究

Growth Variation and Early Selection of Pheliodendron amurense Rupr.

对吉林省黄波罗（Pheliodendron amurense Rupr．）天然林和人工林平均优势木的树干纵向解析材料进行了研究，结果表明：黄波罗不同林分个体生长性状变异随年龄的增长呈递减趋势，幼、成龄相关系数随年龄增长渐次提高．其中，天然林30a以后生长变异分化趋于平稳，是生长性状相关的转折点，人工林为18d．综合分析黄波罗不同林分个体生长变异规律，早、晚期相关程度及选择效率，初步确定黄波罗天然林和人工林的最佳早期选择年龄分别为30a和18a．

The longitudinal trunk of average dominant wood of the natural forest and the plantation of Pheliodendron amurense Rupr. in Jilin Province were researched. The results showed：the growth variation of individual decreases with the increases of the age, relative coefficient of juvenile and mature forest rises with the increases of the age, the growth variation of natural forest after 30 a will be stable, and is relative turnover point of growth characters,the growth variation of plantation is 18 a. Comprehensively considering the rule of the growth variation,juvenile-mature correlation and selection efficiency of each characters of Pheliodendron amurense Rupr. the age of thirty years is determined as the optimal age of the early selection for the natural forest and eighteen years for the plantation.