杉木-闽楠混交林林分结构与生产力功能耦合关系研究

Study on the Coupling Relation between Stand Structure and Productivity Function of Chinese Fir and Phoebe bournei Mixed Forest

为了研究林分结构与生产力功能之间的关系,探讨确定杉木-闽楠混交林的合理林分结构,为维持群落结构稳定和提高林木生产力提供依据。以湖南省永州市金洞林场杉木-闽楠混交林为研究对象,利用获取的调查数据,运用主成分分析方法,分析平均胸径、平均高、郁闭度、混交度等林分结构因子与生产力功能间的耦合作用。建立林分结构与功能的耦合关系模型,对林分结构和生产力功能进行分析,结果表明,林分结构因子与生产力功能密切相关。生产力综合评价指数较高的林分具有的特征为:中等密度(1500株/hm^2)、郁闭度为0.7左右、林层结构为复层林。这种结构特征有利于保持较好的生产力功能,是金洞林场杉木-闽楠混交林的最佳林分结构。

This paper aims to study the relationship between stand structure and productivity function,determine the rational stand structure of Chinese fir and Phoebe bournei mixed forest,and to provide the basis for maintaining the stability of community structure and improving forest productivity.With the mixed forest of Chinese fir and Phoebe bournei in Jindong Forestry Farm of Yongzhou City,Hunan Province as the research object,the coupling effects between stand structural factors such as average DBH,average height,canopy closure and mingling intensity and productivity function were analyzed by using the survey data and principal component analysis method.The coupling relationship model of stand structure and function was established,and the structure and productivity function of stand were analyzed.The results showed that the stand structure factors were closely related to productivity function.The stand with high productivity comprehensive evaluation index has the following structural characteristics:medium density (1500 trees/hm^2),canopy closure of about 0.7,and multi-layer forest structure which is conducive to maintaining better productivity function and is the best stand structure of Chinese fir-Phoebe bournei mixed forest in Jindong Forest Farm.