格氏栲人工林直径分布结构特征

Structure Feature of Diameter Distribution in Castanopsis kawakamii Artificial Forests

明确林分直径结构对森林可持续经营中具有重要意义。笔者基于5种概率分布对格氏栲人工林5种不同群落类型的格氏栲直径结构进行分析。结果表明:格氏栲人工林中b分布和Weibull分布均能较好地反映格氏栲种群直径分布结构特征,与林分平均胸径等特征因子存在显著相关,格氏栲种群直径分布范围较大,中径材占多数。对比分析格氏栲人工林与天然林直径结构分布,b分布在格氏栲天然林和人工林的拟合效果均较好,而格氏栲人工林基本为同龄林,人为干扰较大导致Weibull分布的拟合效果较好。分析格氏栲人工林直径分布结构特征,对森林培育与经营具有重要意义。

To assure the forest diameter structure has great significance in forest sustainable management.Diameter structure in 5 different communities of C. kawakamii artificial forest was studied by applying 5different probability distributions. The results showed that the structure feature of C. kawakamii＇s diameterdistribution could be well reflected by b distribution and Weibull distribution, which had significant correlationwith average bosom diameter of standing forest. The deviate degree being different and the peak value beingnegative and smooth, which indicated that the diameter structure of the superiority had a large scope and themedium bosom diameter was in the majority. Comparing the diameter structure of C. kawakamii population inartificial and natural forest, b distribution imitates well in different forest origins. However, as a result of humandisturbance, Weibull distribution was well reflected the diameter structure of C. kawakamii population aswhich were same age in artificial forest. The author analyzed the diameter distribution structure feature of C.kawakamii population in artificial forest, which had great significance in cultivating and managing C.kawakamii population.