森林工程2025，Vol.41Issue(5)：948-957,10.DOI:10.7525/j.issn.1006-8023.2025.05.008
基于泰森多边形图法的樟子松人工林林分空间结构参数与林分优化
Spatial Structure Parameters Based on Voronoi Diagram and Stand Optimization of Pinus sylvestris Plantation
摘要
Abstract
Spatial structure units of Pinus sylvestris plantations stands were established using Voronoi diagram and n=4 methods,with subsequent comparision of their colculated stand spatial structure parameters.Both methods were em-ployed to calculate the comprehensive index(Q)of single-tree spatial structure,enabling forest stand optimization and comparison.The goal was to evaluate the advantages of the Voronoi diagram method in calculating forest structure param-eters and optimizing stand structure in Pinus sylvestris plantations.Fixed plots of 22-,31-,and 43-year-old Pinus sylves-tris plantations in Mengjiagang Forest Farm,Jiamusi City,Heilongjiang Province,were selected for this study.Forest spatial structure units were determined using both the Voronoi method and the n=4 method.For each sample plot,the size ratio(U),angular scale(W),competition index(CI),and openness(K)were calculated.A significance test was conducted to assess the differences between the results obtained from the two methods.Based on these parameters,a comprehensive index(Q)of individual tree spatial structure was constructed to guide stand thinning and simulate the ef-fects of stand spatial structure optimization under different thinning intensities(10％,20％,and 30％).The results re-vealed significant differences between the Voronoi method and the n=4 method in calculating W,CI,and K for Pinus syl-vestris plantations(P<0.01).Using the Q values derived from the Voronoi method,thinning was conducted at intensities of 10％,20％,and 30％.After thinning,the average DBH of the stand increased by 0.27 cm,1.03 cm,and 1.47 cm,respectively.Concurrently,U decreased by 7.17％,24.80％,and 38.93％;W decreased by 27.98％,55.65％,and 69.35％;CI decreased by 19.62％,35.74％,and 47.78％;and K increased by 6.37％,16.67％,and 28.92％.The Q value increased by 84.91％,248.12％,and 530.87％,respectively.The simulated changes under the three thinning intensities demonstrated significant improvements in stand parameters and overall spatial structure optimization,with the most pronounced effects observed at the 30％thinning intensity.The Voronoi method is an effective approach for con-structing forest spatial units,calculating stand spatial structure parameters,and optimizing stand structure in Pinus syl-vestris plantations.This method provides a robust framework for enhancing forest management practices and achieving sustainable stand optimization.关键词
Voronoi图法/林分空间结构/樟子松人工林/抚育间伐/空间结构综合指数Key words
Voronoi diagram/stand spatial structure/Pinus sylvestris plantation/tending thinning/spatial structure comprehensive index分类
农业科技引用本文复制引用
王维芳,韩子丰,李国春..基于泰森多边形图法的樟子松人工林林分空间结构参数与林分优化[J].森林工程,2025,41(5):948-957,10.基金项目
国家重点研发计划项目(2022YFD2201002). （2022YFD2201002）
