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中国沙漠 ›› 1997, Vol. 17 ›› Issue (3): 269-273.

• 研究论文 • 上一篇    下一篇

雅鲁藏布江中部流域沙地植被的分类和排序

沈渭寿   

  1. 中国科学院兰州沙漠研究所, 兰州 730000
  • 收稿日期:1995-04-17 修回日期:1996-10-23 出版日期:1997-09-20 发布日期:1997-09-20
  • 作者简介:沈渭寿,男,1958年出生,理学博士,副研究员。主要从事沙区植被研究工作。

CLASSIFICATION AND SORTING OF THE PSAMMOPHYTIC VEGETATION IN THE MIDDLE YARLUNG ZANGBO RIVER BASIN,TIBET

Shen Weishou   

  1. Institute of Desert Research, Chinese Academy of Sciences, Lanzhou 730000
  • Received:1995-04-17 Revised:1996-10-23 Online:1997-09-20 Published:1997-09-20

摘要: 选用模糊聚类分析方法,利用群落组种的相对盖度作为优势度指标,将该区沙地植被划分为22个群系,群系下又划分出了不同的群丛。同时,采用主分量分析(PCA)模型,对10个常见的群落类型进行了二维排序,比较直观和真实地反映了不同群落类型在土壤砾石化程度和土壤潜在肥力2个环境梯度上的分布情况。

关键词: 雅鲁藏布江, 沙地植被, 模糊聚类, PCA排序

Abstract: The psammophytic vegetation in the Middle Yarlung Zangbo River Basin is divided into twenty-two formations by using Fuzzy cluster analysis method.At the same time,using principal components analysis(PCA) model,two-dimentional sorting was made for ten community types,which visually and really responsed the distribution of these types on the two environmental gradients of potential soil fertilities and soil coarsening degrees.

Key words: The Yarlung Zangbo River, Psammophytic vegetation, Fuzzy cluster, Principal components analysis

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