Suaeda glauca and Suaeda salsa Employ Different Adaptive Strategies to Cope with Saline–Alkali Environments

(1) Background: soil salinization has become a global problem that restricts agricultural production; thus, there is need to explore the special survival strategies of halophytes in saline–alkali environments. (2) Methods: this study conducted comparative analysis differences metabolites and mineral elements between two indicator plants (Suaeda glauca Suaeda salsa) area. (3) Results: S. salsa leaves accumulated more total nitrogen (TN), organic carbon (TOC), calcium (Ca), sodium (Na) manganese (Mn). The Na/K showed was tolerant environments than glauca. Metabolite revealed significant increase added sugars compared with accumulation most acids associated TCA cycle, which suggests an enhancement flow from glycolysis cycle. In addition, content phenolic substances, such as phenylpropane compounds flavonols, also changed environments, may have promoted metabolism acids. (4) Conclusions: during process plant adaptation salinity, central metabolism, while acid metabolism.