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.

Key words: Yuncheng Salt Lake, plant community, Na⁺, K⁺