Abstract: To explore the effect of exogenous salicylic acid on the antioxidant enzyme activities of Avena sativa L.under saline-alkali stress,a neutral salt solution and an alkaline salt solution were applied to generate stress followed by the application two concentrations of exogenous salicylic acid.The results showed that alkali stress significantly inhibits antioxidant enzyme activity compared with salt stress,and the antioxidant enzyme activity of the resistant variety“Monyan No.1”was significantly improved under salt-alkali stress.The content of malondialdehyde was less than that of the taiyangshen,application of exogenous salicylic acid significantly increased antioxidant enzyme activity,which had a better effect on improving alkali stress,and the 0.05 mmol/L concentration was more effective than the 0.1 mmol/L concentration.

Key words: Avena sativa L.;Saline-alkali stress;Salicylic acid;Antioxidant enzyme activities