西北林学院学报2018，Vol.33Issue(3)：219-225,7.DOI:10.3969/j.issn.1001-7461.2018.03.34
川西南高原云南松林直径分布研究
Studies on Diameter Distribution of Pinus yunnanensis Forest in Plateaus of Sw-Sichuan Province
摘要
Abstract
The purpose of this study was to explore the distribution regularity of the diameter of different origin,and to provide theoretical and methodological bases for the management of Pinus yunnanensis stands.Based on the survey data,the diameter distribution of natural and aerially seeded forests of Pinus yunnanensis were separately fitted with Normal,Weibull,Beta and Gamma distribution functions,and all the distributions were checked by x2-test.Majorities of P.yunnanensis trees were in small and mediumsized diameter,comparatively,less in large diameter.The diameter distribution curves significantly slanted to the left,besides,the variation of the diameter distribution changed much more.The aerially seeded stands had a narrow distribution,therefore the competition between them was keen.On the other hand,the dispersion of natural stands was larger,but the number of subsequent trees was insufficient.Normal model and Gamma model were inconsistent with the actual situations,from which the overall estimations on the tree number were too small.With higher compliance in all diameter distribution,Weibull model and Beta model showed good adaptability and flexibility,they were more suitable to describe the diameter distribution of P.yunnanensis.关键词
云南松/直径分布/天然林/飞播林Key words
Pinus yunnanensis/diameter distribution models/natural forest/aerial seeding forest分类
农业科技引用本文复制引用
李愿会..川西南高原云南松林直径分布研究[J].西北林学院学报,2018,33(3):219-225,7.基金项目
西昌市森林资源规划设计调查项目. （）
