文献类型：期刊文献

中文题名：人工林经营中保持森林结构稳定性的探究

英文题名：Exploration of Structure Stability Optimization about Plantation Landscape from Perspective of Complex Network

作者：李锐[1] 李际平[2] 张利利[3]

第一作者：李锐

机构：[1]国家林业局中南林业调查规划设计院;[2]中南林业科技大学林业系统工程实验室;[3]中国林业科学研究院亚热带林业实验中心

年份：2017

卷号：0

期号：5

起止页码：28-34

中文期刊名：林业资源管理

外文期刊名：Forest Resources Management

收录：北大核心:【北大核心2014】；

基金：国家自然科学基金面上项目"森林景观小班耦合网络特性与结构优化机理研究"(31470642)

语种：中文

中文关键词：人工林经营;森林结构;森林耦合网络;节点数;介数;稳定性

外文关键词：plantation management;forest structure;forest coupled network;number of vertices;betweenness;stability;optimize

分类号：S757

摘要：采用小班水平上的划分方法,将小班看做是林分中的"单木",相邻小班之间的边缘效应近似模拟了林分中"单木"与"单木"之间的空间位置关系,利用GIS构建森林耦合体。通过复杂网络将之抽象化为森林耦合网络,利用已构建的森林耦合网络结构稳定性模型,针对人工林的林学特征与经营方式,探究人工林经营中森林结构稳定性的优化调控。研究结果表明:1)当森林耦合体中存在面积较大的、林分质量较差的小班时,可将其更新为面积较小的小班,在小班上选择性更新与周围小班不同的树种,使面积较大的小班逐渐演替为"混交"的面积较小的小班。这一过程平衡了面积较大的小班周围介数分布,提高了森林结构稳定性。2)当森林耦合体中存在林窗时,可以在林窗中补植与周围优势树种不同的林木。这一过程降低了林窗周围节点的介数,平衡了整个网络的介数分布,提高了森林结构稳定性。研究森林耦合网络结构优化,实际上就是解决小班如何在有限空间内的合理布局,旨在为人工林经营过程中如何保持森林结构稳定性,同时又兼顾林业生产的可操作性提供一种新的思路。
Using the dividing method of sub compartment level,the sub compartment is treated as“individual tree”,the sub compartment as stand between adjacent sub compartment stands in the edge effect approximately simulates“individual tree”and“individual tree”space position relation,GIS is used to build the forest coupling system.Through complex coupling network,the network was abstracted into the forest to build and use forest coupling network structure stability of the model.In view of the plantation forestry characteristics and mode of operation,the optimization of the structure stability of the plantation management is explored.The results were as follows:(1)As the forest coupling system exists in the larger area and quality of sub compartment which can be updated to a small area is poor,selective update in sub compartment with the surrounding sub compartment of different tree species can be made,and the sub compartmentes with larger area are gradually changed into the area of the“mixed”smaller sub compartmentes.This is a process that balances the betweenness distribution around the sub compartmentes with larger area,improving the forest structure stability.(2)When the forest forest gap exist,in the coupling system,replanting can be made in forest gap and the advantage species around different trees used,the process reduces the forest window around the node betweenness,balances the betweenness of the entire network distribution,improving the forest structure stability.Study on coupling network structure optimization was actually how to solve a small forest in the limited space within the reasonable layout,aimed at for the plantation management in the process of how to keep the forest structure stability,at the same time,both the maneuverability of the forestry production to provide a new train of thought.