Abstract: To solve the problem of increasing soil salinization, the effects of exogenous salicylic acid and chitosan on the physiological characteristics of Vicia villosa Roth seedlings were studied. ‘Tianshi 2' V. villosa Roth as the material, with 1 mmol/L salicylic acid and 0.30% chitosan treated, under different salt-containing soil conditions, catalase activity, superoxide dismutase activity, soluble sugar content, soluble protein content, proline content and malondialdehyde content. Were deter mined. Conpared with the contrd greup, the cidalase activity, super c side disrn utase activity, soluble sugur conreit, soluble prolein content and proune content of 1 mmol/L solicguc acid and 0.30% chitosan treated V. Viuosa Roth seedling increased 8.37% and 9.43%, 7.45% and 8.41%, 4.21% and 11.73%, 32.01% and 38.50%, 9.52% and 11.90%（P<0.05）respeetively under 0.38% salt centent. The content of malondialdehyde was decreased by 15.06% and 17.85%（P<0.05）, respectively. The content of soluble sugar and soluble protein of V. villosa Roth seedling treated with 0.30% chitosan were higher 8.25% and 13.90%（P<0.05）than control respectively under 0.70% salt content. There was no significant difference in the contents of the two substances between the 1 mmol/L salicylic acid treatment and control of V. villosa Roth seedlings under 0.70% salt content. Salicylic acid and chitosan can effectively alleviate the impact of salt stress on the seedlings of V. villosa Roth seeds, and the degree of 0.30% chitosan is better than 1 mmol/L salicylic acid.

Key words: Vicia villosa Roth, antioxidant enzymes, osmotic regulator, salt stress, exogenous substances