[目的]研究外源赤霉素(GA3)对盐胁迫下盐角草种子发芽及幼苗生长的影响。[方法]通过不同浓度(0、100、300、500、700mmol/L)的NaCl结合10μg/mlGA3处理,研究了外源GA3对盐胁迫下盐角草种子萌发及幼苗生长的影响。[结果]外源GA3提高了盐胁迫条件下盐角草的发芽率、发芽势、发芽指数以及活力指数。在外源GA3处理下,盐角草的根系活力、幼苗根茎长及耐盐性都高于单盐处理。[结论]在一定浓度范围内,外源GA3能缓解盐胁迫对盐角草种子萌发及幼苗生长的抑制作用。 [Objective] The purpose was to study the effects of exogenous GA3 on seed germination and seedling growth of Salix capsicum under salt stress. [Method] Effects of exogenous GA3 on seed germination and seedling growth of Salix capsicum under salt stress were studied by NaCl (10,100μg / ml, 300,500,700mmol / L) and 10μg / ml GA3. [Result] Exogenous GA3 increased the germination rate, germination potential, germination index and vigor index of Salix psammophila under salt stress. Under exogenous GA3 treatment, root activity, seedling root length and salt tolerance were higher than those of single salt treatment. [Conclusion] Exogenous GA3 could alleviate the inhibitory effect of salt stress on the seed germination and seedling growth of Salix babylonica at a certain concentration range.