安西极旱荒漠自然保护区典型植物群落特征研究

Characteristics of Typical Plant Community In Anxi Extra-arid Desert Nature Reserve

运用样方法,以重要值为测度指标,调查分析了安西极旱荒漠自然保护区典型植物群落的类型及种群的密度、频度、盖度和重要值等群落学特征。结果表明:依据群落外貌结构和植物种类组成等特征,按照样方中多年生灌木建群种和优势种的重要值,可划分为5个典型植物群落,其中合头草+珍珠猪毛菜群落多样性相对较丰富;群落的优势种主要为中亚典型的荒漠植物合头草(49.26)、珍珠猪毛菜(18.04)、红砂(17.27)、泡泡刺(15.18)和裸果木(12.22)等多年生灌木;合头草为主要优势建群种,在整个植物群落中分布极为显著,具有较高的重要值。

Using the method of sampling,taking the important value as the measurement index,the community characteristics of typical plant communities,such as density,frequency,coverage and important value,were investigated and analyzed in Anxi extra-arid desert nature reserve.The results showed that:according to the characteristics of community appearance structure and plant species composition,according to the important values of perennial shrub species and dominant species in the sample plot,it can be divided into five typical plant communities,among which the community diversity of Sympegma regelii+Salsola passerina is relatively rich.The dominant species of the community are mainly the typical desert plants in Central Asia,such as Sympegma regelii(49.26),Salsola passerina(18.04),Reaumuria soongorica(17.27),Nitraria sphaerocarpa(15.18)and Gymnocarpos przewalskii(12.22).Sympegma regelii is the main dominant constructive species,which is very significant in the whole plant community and has high important value.