he biomass and physiological index of Leymus chinensis in different salty habitats areanalysized.The results show that L. chinensis distributes in a wide ecological variability,be-cause it can adapt to the habitats of different salinization gradients.It can grow well if soilhas a conductivity is reflected in uptaking inorganic ions and accumulating proline in a largemount to improve regulation of osmosis. When the conductivity is lower than 0. 7mS/cm,itmainly relies on uptaking inorganic ions to have such a...