期刊论文

中文

西南林业大学学报：自然科学

2095-1914

2016

36

2

108-112

10.11929/j.issn.2095-1914.2016.02.018

2013ZK2031:湖南省软科学研究计划重点项目 201004032:林业公益性行业科研专项 201108478:海南省林业厅重点科研项目

本校为第一机构

选取海拔差异明显的大围山杉木人工林作为研究对象,共设置14个样带152块样方,构建了林分生长-立地因子-林分密度因子的结构方程模型。结果表明:对林分生长影响最大的是林分密度因子,总影响系数为-0.904,无间接影响;立地因子对林分生长的总影响系数为0.264,直接路径系数仅为0.018,表明立地因子主要依靠制约林分密度因子来间接影响林分生长。通过适配性检验表明,该模型与实际情况拟合程度较高,能为实际生产过程提供一定帮助,模型整理得出,杉木在大围山地区适合种植在海拔1 100 m以下的地方,将单位面积株数控制在1 500株/hm2左右,并及时疏伐能加快达到经营者的培育目标和经济效益。

In this research, took Cunninghamia lahceolata plantation in different elevation in Dawei Mountain as object, set 14 transects, which include 152 sample plots, and construct a structural equation model of forest growth-site factor-stand density factor. The result showed that the greatest impact stems from stand density factor with -0. 904, and has no indirect effect. The site factor affects forest growth with 0. 264 as total index, but only 0. 018 as direct influence. It suggests site factor is mainly limited by density. Result of suitability test showed that the fitting effect of model and ac...