期刊论文

Evaluation of stand structure diversity of Cunninghamia lanceolata forest based on structural equation modeling

中文

生态学报

1000-0933

2024

44

2

745-756

10.20103/j.stxb.202301160112

2023JJ30991:湖南省自然科学基金面上项目 2012BAD22B0505:国家科技支撑计划 19A518:湖南省教育厅重点科研项目

本校为第一机构

综合评价杉木林林分结构多样性,可为提高林分结构多样性和精准制定森林经营措施提供理论依据.以湖南省平江县福寿林场的杉木林为研究对象,利用4株邻近木构建林分空间结构单元,选取表征林分树种组成多样性的全混交度、Simpson多样性指数与Shannon-Wiener指数,表征林木大小分化多样性的大小变异系数、大小分化度均值指数与交角竞争指数和表征林木空间分布多样性的角尺度、林层指数与空间密度指数等9个指标,构建林分结构多样性评价结构方程模型,并确定各指标权重,对林分结构多样性进行综合评价.结果表明:(1)林分结构多样性评价结构方程模型的卡方自由度比值x2/df为1.409,介于1-3之间,比较适配指数(...

The stand structure diversity of Cunninghamia lanceolata forest was comprehensively evaluated,in order to provide the theoretical basis for improving the stand structure diversity and accurately formulating forest management measures.Taking the Cunninghamia lanceolata forest in Fushou experimental forest farm of Pingjiang county,Hunan Province as the research object,the stand spatial structure unit was constructed by four adjacent trees.Nine indexes were selected,including complete mingling degree,Simpson diversity index and Shannon-Wiener inde...