Abstract: The seeds of Vitex negundo，Fraxinus velutina and Elaeagnus angustifolia were treated with different concentration mixture of NaCl and Na₂CO₃.Their germination percentage，speed and the growth of radical under salt stress,the germination in light and darkness, were measured and analysed. The results showed that the light prominently promote seed germination of the three plants,and the effect of light to the growth of radical is different. Lower concentrations of salt promoted seeds germination of Vitex negundo and Fraxinus velutina, slightly restrained of Elaeagnus angustifolia.The effect to the three plants are bad especially to Vitex negund when the salt concentration exceeding 0.8%.The three plants can be cultivated in the salinity soil and cultivated as landscape plant in Tianjin. Elaeagnus angustifolia widely planted is viable in Tanggu.

Key words: salt stress, seed germination, salinification