祁连山青海云杉天然林林分径级结构空间分布格局分析

林业资源管理 ›› 2013›› Issue (6): 127-132.

祁连山青海云杉天然林林分径级结构空间分布格局分析

王梅¹, 达光文¹, 王英成², 许开胜¹, 朱金玉³, 周光军², 李建海²

1.天祝县林业勘察设计队,甘肃天祝 733200;
2.天祝县林业工作站,甘肃天祝 733200;
3.天祝县华藏林场,甘肃天祝 733200

收稿日期:2013-09-27 修回日期:2013-11-01 出版日期:2013-12-28 发布日期:2020-11-23
通讯作者: 达光文(1973-),男,甘肃天祝人,高工,主要从事林业勘察设计工作。Email:tzlkd@163.com
作者简介:王梅(1986-),女,甘肃武威人,助工,主要从事林业勘察设计工作。Email:wangmei2009050367@163.com

Analysis on Spatial Distribution Pattern of Diameter-class Structure for Natural Picea crassifolia Forest Stand in Qilian Mountains

WANG Mei¹, DA Guangwen¹, WANG Yingcheng², XU Kaisheng¹, ZHU Jinyu³, ZHOU Guangjun¹, LI Jianghai²

1. Foresty Survey & Design Team of Tianzhu County,733200,Tianzhu,Gansu;
2. Foresty Station of Tianzhu County,733200,Tianzhu,Gansu;
3. Huazang Forestry Centre of Tianzhu County,733200,Tianzhu,Gansu,China

Received:2013-09-27 Revised:2013-11-01 Online:2013-12-28 Published:2020-11-23

摘要/Abstract

摘要： 对祁连山东段青海云杉(Picea crassifolia)24块森林资源连续清查固定样地的林木径级结构分布进行了分析。结果表明:祁连山青海云杉天然林林木径级呈现出小径级木(6～12cm)所占比例较大,大径级木(26～36cm)及特大径级木(≥38cm)所占比例较小,而且低海拔、低密度下样地林木径级结构呈现不规则状分布;随海拔高度和密度的增加,林分内小径级木所占比例大体呈逐渐增大,大径级木及特大径级木所占比例逐渐减小的趋势,林木径级结构均呈现反J型分布;对林木径级分布状况采用线性函数拟合,三次函数能很好的拟合呈反J型分布的林木径级结构;林木平均胸径与密度之间的相关系数为0.513,呈显著负相关关系,平均胸径与海拔之间的相关系数为0.018,相关性不明显。

关键词: 青海云杉, 林木径级, 海拔, 密度, 空间分布

Abstract: Analysis has been made on the distribution of diameter class structure of trees in 24 permanent sample plots of Picea crassifolia at the eastern section of Qilian Mountains.The followings are the results we have concluded.The small diameter trees (6～12cm) of natural Picea crassifolia forest Stand in Qilian Mountains occupy a big proportion,but the large diameter trees (26～36cm)and the larger diameter trees(≥38cm)occupy a small proportion.The distribution of diameter class structure of trees shows irregular shape in sample plots with low altitude or density.With the increase of altitude and density,the proportion of the small diameter trees in general is gradually increasing,the proportion of the large diameter trees and the larger diameter trees decreases gradually.Forest tree diameter class structure shows a reverse J-type distribution.Using a linear function fitting on tree diameter class distribution,it has been showed that the cubic function well fits the forest tree diameter class structure and the curve is the J-type.The correlation coefficients between tree average DBH and density is-0.513,which has showed significant negative correlation and the correlation coefficient between average DBH and altitude is 0.018,the correlation is not obvious.

Key words: Picea crassifolia, diameter class of trees, altitude, density, spatial distribution

中图分类号:

Q948
S758.5

王梅, 达光文, 王英成, 许开胜, 朱金玉, 周光军, 李建海. 祁连山青海云杉天然林林分径级结构空间分布格局分析[J]. 林业资源管理, 2013,(6): 127-132.

WANG Mei, DA Guangwen, WANG Yingcheng, XU Kaisheng, ZHU Jinyu, ZHOU Guangjun, LI Jianghai. Analysis on Spatial Distribution Pattern of Diameter-class Structure for Natural Picea crassifolia Forest Stand in Qilian Mountains[J]. FOREST RESOURCES WANAGEMENT, 2013,(6): 127-132.

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