大理州云南松天然林林分直径结构动态变化研究  

Dynamics of Diameter Structure of Pinus yunnanensis Natural Stand in Dali

作　　者：魏安超 张大为 WEI Anchao;ZHANG Dawei(Yunnan Jinshan Engineering Construction Supervision Consulting Co.,LTD,Kunming 650051,China;Academy of Inventory and Planning,National Forestry and Grassland Administration,Beijing 100714, China)

机构地区：[1]云南金杉工程建设监理咨询有限公司,云南昆明650051 [2]国家林业和草原局调查规划设计院,北京100714

出　　处：《林业调查规划》2021年第3期21-26,32,共7页Forest Inventory and Planning

摘　　要：研究云南松天然林分的直径结构特征及动态变化规律,对于掌握云南松天然林分的测树学特征具有重要的基础性作用。基于5期云南省森林资源连续清查样地数据,以优势树种为云南松的样地为研究对象,采用偏度、峰度、变动系数、累积株数分布、径阶株数分布和每公顷胸高断面积对大理州云南松天然林林分直径结构动态变化规律及林分密度对其影响进行分析。结果表明,林分直径偏度、峰度和变动系数总体上随林分年龄的增加而下降,林分密度对林分直径变动系数无明显影响;林分直径株数累积比重随径阶的增加而增加,随林分密度的增加而增加;林分径阶株数随径阶的增加而减小,随林分年龄的增加而下降,株数集中分布在6~18 cm径阶范围;林分每公顷胸高断面积总体上随年龄的增加而增加,随林分密度的增加而增加。The study on the diameter structure characteristics and dynamics law of Pinus yunnanensis natural stand is very important for mastering the tree measurement characteristics.Based on the data of continuous forest inventory during the 5 period in Yunnan Province,this paper analyzed the dynamics of diameter structure of Pinus yunnanensis natural stand and the influence of stand density by skewness,kurtosis,variation coefficient,cumulative plant number distribution,diameter grade and number distribution and basal area at breast height per hectare.The results showed that the skewness,kurtosis and variation coefficient of stand decreased with the increase of the stand age,and the stand density had no significant effect on the variation coefficient of the stand diameter structure;the cumulative plant number distribution of stand diameter increased with the increase of diameter class and stand density;the diameter grade and number distribution decreased with the increase of diameter class and stand age,and the number of trees distributed in 6~18cm diameter class range;the basal area at breast height per hectare increased with the increase of stand age and density.

关 键 词：云南松天然林分 林木直径结构 林分密度 胸高断面积 云南大理 

分 类 号：S791.257[农业科学—林木遗传育种] S754.1[农业科学—林学]