不同放牧强度下高寒草甸植被演替规律的数量分析

 本文采用数量分析方法，研究了不同放牧强度下高寒草甸植被的演替规律。聚类分析的结果，当相关系数R>0.850时，组成群落的24种植物聚合为6类，它们分别属于植物群落不同演替阶段的建群种，优势种或主要伴生种，当R>0.870时，6个放牧强度下的群落聚合为2类，分别属于以禾草植物为共建种的两层结构的植物群落和以矮嵩草(Kobresia humilis)以及 杂类草为共建种的单层结构的植物群落。

QUANTITATIVE ANALYSIS OF SUCCESSION LAW OF THE ALPINE MEADOW UNDER THE DIFFERENT GRAZING INTENSITIES

The succession law of the alpine meadow was studied with the met- hod of quantitative analysis under the different grazing intensities in this paper.The results have proved that there are close successive relations among communities under different grazing intensities.Clustering result shows that when correlation coefficient R>0.850,24 species plants of a community were grouped into 6 types,they respectively belong to dominant,constructive or accompanying species of successive different phases of a community and that when R>0.870,communities under 6 grazing intensities were grouped into 2 types.They respectively belong to community taking grasses as polydominant and of 2 layer structure, and taking Kobresia humilis and forbes as polydominant and of 1 layer structure.