文献类型：期刊文献

中文题名：基于空间结构优化的金盆山天然混交林采伐模拟

英文题名：Logging Simulation of Natural Mixed Forest in Jinpen Mountain Based on Optimization of Spatial Structure

作者：赵晨昊[1] 王建军[2] 周光[3] 余林[3] 龚循胜[4] 孟京辉[1]

第一作者：赵晨昊

机构：[1]北京林业大学林学院,北京100089;[2]中国林业科学研究院林业科技信息研究所,北京100091;[3]江西省林业科学院,江西南昌330013;[4]江西省信丰县金盆山林场,江西赣州341600

年份：2022

卷号：42

期号：5

起止页码：126-133

中文期刊名：西南林业大学学报：自然科学

外文期刊名：Journal of Southwest Forestry University:Natural Sciences

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：江西省林业局林业科技创新专项经费项目(创新专项[2019]13号)资助。

语种：中文

中文关键词：森林经营;天然阔叶混交林;空间结构;择伐

外文关键词：forest management;natural broad-leaved mixed forest;spatial structure;selection cutting

分类号：S753.7

摘要：以江西信丰金盆山林场内天然阔叶混交林为研究对象,采用择伐措施,将空间结构优化作为主要目标、非空间结构作为首要的约束条件,确定采伐木并对样地中林木进行采伐模拟,对林分进行优化。结果表明:初始状态下天然阔叶混交林的全混交度为0.5486,大小比数为0.4845,角尺度为0.5464,空间结构综合指数为22.4674,林分现有结构存在着林木间竞争强度大且林木呈团状分布的问题。基于优化目标与约束条件,从样地内420株林木中选取出39株备选木进行模拟采伐,采伐强度为9.286%,对比采伐前后的空间结构指标,样地的全混交度增大了0.1641%、大小比数减小了0.2477%、角尺度值减小了8.4919%,且更接近于0.5,总体空间结构得到了优化。本研究提出了金盆山林场基于空间结构优化的抚育采伐方式,考虑物种空间分布关系,通过对比分析采伐前后空间结构指标,证明了该采伐方式的科学合理性,为金盆山林场天然阔叶混交林抚育经营提供了参考依据。
Taking natural broad-leaved mixed forest in Jinpen Mountain Forest Farm in Xinfeng County,Jiangxi Province as the research object,taking selective felling as the main measure,spatial structure optimization as the main goal,and non-spatial structure as the primary constraint,determine the felled trees and simulate the felling of the trees in the sample plot,and optimize the forest stand.The results of the study showed that in the initial state,the total mixed degree of the natural broad-leaved mixed forest was 0.5486,the size ratio was 0.4845,the angular scale was 0.5464,and the spatial structure index was 22.4674.The existing structure of the forest stands in competition among trees.The problem of high intensity and the distribution of trees in clusters.Based on the optimization goal and constraint conditions,39 candidate trees were selected from 420 trees in the sample plot for simulated logging,and the logging intensity was 9.286%.Compare the space before and after logging.Structural indicators,the total mixing degree(M)of the plot has increased by 0.1641%,the size ratio(U)has decreased by 0.2477%,the angular scale value(W)has decreased by 8.4919%,and it is closer to 0.5.The overall spatial structure has been optimized.This study proposes a tending logging method based on the optimization of the spatial structure of the Jinpen Mountain Forest Farm,taking into account the spatial distribution of species,and comparing and analyzing the spatial structure indicators before and after logging,which proves the scientific rationality of the logging method.It provides a reference for the tending and management of natural broad-leaved mixed forest in Jinpen Mountain Forest Farm.