In this study, distribution and establishment of semi-steppe rangelands vegetation in related to the most important environmental parameters as edaphically and physiographical factors be considered using DCA,CCA and TWINSPAN.Generally rangelands vegetation dependent to the matrix of environmental factors which be classified to edaphical, physiographical and climatically ones.Vegetation has an important role in rangelands that ecologically balance the tropical relations among food chains. So determining the rangeland flora, their pattern and distribution and the most abiotic important factors affecting the species maintaining rangelands need to apply multivariate analysis for the nature of data using in such a these studies. Using Pc-Ord software in 26704 ha, we classified the rangelands vegetation into 15 ecological species groups among four altitudinal stratum form 2400 to 2800 meters. These groups also respond to the most important factors such as sand and nitrogen in 2400-2500 m.,slope,aspect,elevation,clay,K in 2500-2600,elevation,slope,Caso4,EC,C/N,P and sand in 2600-2700 m.,elevation, CaCO3 and sand in 2700-2800 are the most important factors forming the vegetation of semi-steppe rangelands. Key words: Multivariate;; Rangelands;; DCA; CCA;; TWINSPAN
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机译：在这项研究中，使用DCA，CCA和Twinspan的养生环境参数的分布和建立植被与最重要的环境参数相关的植被.Generally牧场植被依赖于分类为俯视性的环境因子矩阵，地理学和积压。在牧场具有重要作用，从而生态地平衡食品链中的热带关系。因此，确定牧场植物群，他们的模式和分布以及影响物种维持牧场的最生物的重要因素需要在这些研究中使用数据的性质来应用多元分析。在26704公顷使用PC-Ord软件，我们将牧场植被分为15个生态物种，四个高原地层2400至2800米。这些群体还响应了2400-2500米的砂和氮等最重要的因素，斜坡，方面，海拔，粘土，k在2500-2600，海拔，斜坡，CasO4，EC，C / N，P和沙子在2600-2700米中，2700-2800的海拔，Caco3和沙子是形成半草原牧场植被的最重要因素。关键词：多变量;;牧场;; DCA; CCA ;; Twinspan.
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