马尾松天然次生林林分结构特征分析  

Analysis of Stand Structure Characteristics of Secondary Pinus massoniana Natural Forest

作　　者：韦朝敏 覃涛 WEI Chaomin;QIN Tao(Laibin Forestry Survey Intitute,Laibin 545001,Guangxi,China;Emengeney Management Bureau of Jinxiu County in Laibin City,Laibin 545700,Guangxi,China)

机构地区：[1]来宾市林业勘测设计院,广西来宾545001 [2]来宾市金秀瑶族自治县应急管理局,广西来宾545700

出　　处：《中南林业调查规划》2022年第2期41-47,共7页Central South Forest Inventory and Planning

摘　　要：为分析马尾松天然次生林的林分结构特征和不同空间结构参数间的相互关系,以改善其林分结构。以广西金秀县的9块马尾松天然次生林样地为研究对象,分析其直径构成,计算林分及林木的混交度、角尺度和大小比数3个空间结构参数,制作二元分布图,探讨两两之间的关系,分析林分空间结构。结果显示,马尾松天然次生林直径分布特征为左偏单峰尖峰山状分布,80.22%的林木直径集中在6~14 cm径阶范围;林分的空间分布格局为不均匀的团状分布,树种隔离程度较好,中度混交;林分中处于随机分布、劣势木和极强度混交的林木占比较多。马尾松天然次生林林分树种隔离程度较好,林木大小分化程度较为均匀,但林分空间分布格局不均匀,应采用去劣留优、补植优良乡土树种等方法,改善林分结构,促进林分天然更新,提高林分质量,实现森林资源的永续利用。In order to analyze the stand structure characteristics of natural secondary forest of Pinus massoniana and the relationships among different spatial structure parameters,so as to improve its stand structure,taking 9 natural secondary forest plots of Pinus massoniana in Jinxiu County,Guangxi as the research objects,the diameter composition was analyzed,the three spatial structure parameters of stand and tree mixing degree,angular scale and size ratio were calculated,the binary distribution map was made,the relationship between pairwise pairs was discussed,and the spatial structure of the stand was also analyzed.The results showed that the diameter distribution of natural secondary forest of Pinus massoniana was characterized by left leaning single peak and peak mountain distribution,and 80.22%of the tree diameters were concentrated in the range of 6~14 cm diameter classes;the spatial distribution pattern of the stand was uneven cluster distribution,and the tree species were well isolated and moderately mixed;in the stand,there were more trees with random distribution,inferior trees and extremely strong mixed trees.The natural secondary forest of Pinus massoniana had good isolation of tree species,and the degree of tree size differentiation was relatively uniform,but the spatial distribution pattern of the stand was uneven.Methods such as removing the inferior and retaining the superior,and replanting excellent native tree species should be adopted to improve the stand structure,promote its natural regeneation,improve its quality,and realize the sustainable utilization of forest resources.

关 键 词：直径 分布 空间 结构 天然次生林 马尾松 

分 类 号：S718.542[农业科学—林学]