安宁河北部流域云南松群落林分径阶大小多样性研究  

Study on the Diversity of Stand Diameter Class of Pinus yunnanensis Community in Northern Anning River Basin

作　　者：王祥福 任枫 王志红 李愿会 董文婷 尚帅斌 杨乔媚 WANG Xiangfu;REN Feng;WANG Zhihong;LI Yuanhui;DONG Wenting;SHANG Shuaibin;YANG Qiaomei(State Forestry Administration Key Laboratory of Eco-hydrology and Disaster Prevention in Arid areas,Northwest Surveying,Planning and Designing Institute of National Forestry and Grassland Administration,Xi’an 710048,China;Xi'an Green Ring Forestry Technical Service Co.,Ltd,Xi’an 710048,China)

机构地区：[1]国家林业和草原局西北调查规划设计院,旱区生态水文与灾害防治国家林业局重点实验室,陕西西安710048 [2]西安绿环林业技术服务有限责任公司,陕西西安710048

出　　处：《四川林业科技》2023年第5期77-81,共5页Journal of Sichuan Forestry Science and Technology

摘　　要：采用1 km×2 km机械布点的方法,在四川省德昌县安宁河流域北部区域,共调查云南松树种组成≥6成的样地74块,探究云南松群落的林分直径大小多样性。结果表明:74个调查样地中,共调查胸径≥5 cm的乔木树种2758株,平均密度为932株·hm^(−2);径阶以6~20 cm为主,占总株数的84.63%;云南松径阶香农-维纳指数和辛普森指数较总体的波动幅度大;典范对应分析表明,径阶的分布及其多样性主要受到密度、海拔和坡度的影响。综上所述,云南松群落林分通过密度、海拔和坡度的变化,影响了其径阶大小的多样性。Using the method of 1 km×2 km mechanical distribution,a total of 74 sample plots with the species composition≥60%were investigated in northern Anning River basin,in Dechang County,Sichuan Province,to explore the diversity of stand diameter of Pinus yunnanensis community.The results showed that there were 2758 trees with DBH≥5 cm were investigated in 74 sample plots,with an average density of 932 plants·hm^(−2).The diameter class was mainly 6-20 cm,accounting for 84.63%of the total number of plants.The Shannon Weiner index and Simpson index of Pinus yunnanensis diameter order fluctuated greatly compared with the whole population.The canonical correspondence analysis showed that the distribution and diversity of diameters were mainly affected by density,altitude and slope.In summary,the diversity of diameter of Pinus yunnanensis community was affected by the changes of density,elevation and slope.

关 键 词：德昌县 云南松群落 林分因子 环境因子 直径大小多样性 

分 类 号：S791.257[农业科学—林木遗传育种]