【摘要】 运城盐湖植物群落结构简单 ,种类组成贫乏 ,总覆盖度 2 0 %～ 80 % ,变化幅度大 ,1m2内仅有优势种 1～ 2个。植物群落类型与土壤含盐量关系密切。同种植物地上部和根部Na+含量随土壤盐度的降低而降低 ,且地上部的降低幅度大于根部。不同种类植物的Na+、K+、Na/K比含量差异很大。随着土壤盐分的下降 ,地上部灰分含量也下降。讨论了其可能的变化机制。更多还原

【Abstract】 The structures of plant community in Yuncheng Salt Lake are very simple, and the species of it are very scarce. The community coverage varies greatly between 20%～80% and there are only one or two dominant plants within 1 m2. The types of plant communities are closely related with the salt contents of soil. Na+ contents of shoot and root in the same species decrease with the decreasing of salt contents of soil, and Na+ contents of shoot change more greatly than that in root. There are significant differences in Na+ ?K+ contents and Na/K ratios among different species. The ash contents of shoot also decrease with the dropping of soil salt content. Furthermore, possible mechanism of these changes are discussed.更多还原