西南林业大学学报2026，Vol.46Issue(5)：32-39,8.DOI:10.11929/j.swfu.202504039
罗田垂枝杉林分结构特征分析与优树选择
Analysis of Stand Structure Characteristics and Selection of Superior Trees of Cunninghamia lanceolata var.luotian
摘要
Abstract
Taking the remaining 3 mature artificial Cunninghamia lanceolata var.luotian as the research ob-ject,this study investigates and analyzes its stand structure characteristics and laws,and selects superior trees us-ing a comprehensive evaluation method of membership functions,in order to provide technical support for the re-source protection and breeding of this Chinese fir variation type.The results showed that the average breast height diameter,tree height,crown length,and volume of the 3 forest stands were 16.9-19.8 cm,16.2-16.5 m,3.0-3.3 m,0.222-0.286 m3,the coefficient of variation for traits such as crown length and individual volume ranges from 25.57％to 38.33％and 30.79％to 45.47％.There is obvious differentiation between individuals,which lays the foundation for selecting excellent individual plants.The skewness values of the diameter structure of the threeforest stands are all greater than 0,and they are normally distributed to the right.The maximum frequency distri-bution of diameter in Xianqiling and Maliping is higher than that in Tielingao.The tree-height structure of the forest stands,except for Xianqiling,follows a normal distribution with a rightward skew.The maximum fre-quency distribution of tree height in Maliping and Tielingao is higher than that in Xianqiling.Meanwhile,the crown length structures of the 3 plots all follow a normal distribution and are mainly distributed in the 3 m crown length range.The Pearson correlation analysis showed a highly significant positive correlation among breast height diameter,tree height,crown length,and volume.Based on selection intensity and total membership letter value sorting and screening,the number of selected excellent trees for this project is 53,and the selection rate of excellent trees ranges from 3.66％to 4.84％.Among them,the selection value and rate of excellent trees in Ma Liping are the highest.The main traits of superior trees show significant gains,with breast height diameter,tree height,and volume increasing by 27.48％,23.73％,and 90.35％,respectively,indicating a clear selection effect.关键词
罗田垂枝杉/林分结构/优树/隶属函数法Key words
Cunninghamia lanceolata var.luotian/stand structure/superior tree/membership function method分类
农业科技引用本文复制引用
曹越,杨姝琦,袁慧,宋齐男,杜超群,许业洲..罗田垂枝杉林分结构特征分析与优树选择[J].西南林业大学学报,2026,46(5):32-39,8.基金项目
湖北省林业科技创新项目(2025LKZC01)资助. （2025LKZC01）
