Abstract: Taking 5 highland barley （Hordeum vulgare L. var. nudum Hook. f.） varieties in Tibet as experimental materials, the effects of different NaCl concentrations on seed germination and seedling growth of highland barley cultivars were studied, and the salt tolerance of different highland barley varieties was evaluated and analyzed. The results showed that under the 0.1% low concentration of NaCl, the germination and seedling growth of highland barley were promoted. When the concentration increased to 0.5%, seed germination potential, germination rate, vigor index and root length, bud length and root fresh weight of seedlings decreased significantly. When the concentration was 1.0%, Longzi black highland barley and Gouzhi purple highland barley had lost germination ability. Overall, among the 5 highland barley varieties, Xila 22 had the best salt tolerance, followed by Zangqing 320, Zangqing 2000, Gouzhi purple highland barley, and Longzi black highland barley had the lowest salt tolerance.

Key words: highland barley（Hordeum vulgare L. var. nudum Hook. f.）, NaCl, seed germination, seedling growth, salt tolerance, Tibet