疏叶骆驼刺种群性质与植物群落演替

POPULATION CHARACTER OF ALHAGI SPARSIFOLIA AND PLANT COMMUNITY SUCCESSION

疏叶骆驼刺广泛分布于新疆平原荒漠地带的低地盐化草甸中。在群落中占优势，或者为伴生种。其群落的植物种类组成和种群特性，随着土壤水、盐状况的改变而有较明显的差异。在人类活动影响下，土壤水、盐环境变化日益加剧，因而疏叶骆驼刺群落的成分也有相应的变化。以疏叶骆驼刺种群性质和草甸植物种类组成特征作为群落演替状态的指示物是本文分析探讨的主要问题。这种指示作用在实践上对当地的水源及土地利用均有一定的应用价值。

Alhagi sparsifolia is widely distributed in lowland saline meadows of Xi- njiang desert region. It occurs as a dominant or an accompanying species in plant communities.In saline meadows. the floristic composition and the po- pulation character of A. sparsifolia varies with the changes in soil water and salt conditions. Under the influences of human activities. more serious chan- ges happen upon soil water and salt conditions.As a consequence. the flori- stic composition of saline meadows become unstable. The population charac- ter of A. sparsifolia may be used as an indicator for succession state of plant community.This function is of significance to water and land use in that re- gion.