【摘要】 通过对黑龙江省嫩江县高峰林场红皮云杉(Picea koraiensis)天然林和人工林优势木的树干解析材料分析表明:红皮云杉的树高、胸径和材积生长由剧烈分化到相对平稳的转折年龄,天然林为40a,人工林为12a。各性状的早晚期相关系数随着年龄的增加而增大,人工林12a以后,天然林40a以后均达到显著与极显著相关水平。综合考虑红皮云杉各性状的生长变异规律、早晚期相关及选择效率,初步确定天然林和人工林的最佳早期选择年龄分别为40a和12a。更多还原

【Abstract】 The study on the stem analysis of dominant trees from natural forest and plantation of P. koraiensis indicates: The growth variations of height,diameter and volume are very acute in the early days and become more and more moderate from fourty years for the natural forest and twelve years for the plantation. The juvenile-mature correlation of the height, diameter and volume are significant at the age of fourty years for the natural forest and ?twelve for the plantation. Comprehensively considering the rule of the growth variation, juvenile-mature correlation and selection efficiency of each characters of P. koraiensis, the age of fourty years is determined as the optimal age of the early selection for the natural forest and twelve for the plantation.更多还原