Abstract:【Objective】The study is carried out to investigate the effects of salicylic acid seed soaking on seed germination of Lolium perenne under different aluminum stress.【Method】 The seeds of perennial ryegrass (Lolium perenne ) 'Secale Cerale 70' were used as experimental materials and were divided into two groups.One group was soaked without salicylic acid,and the other group was soaked with 0.5 mmol/L salicylic acid (SA).Seven AlCl3 solu- tions with different concentrations (0,0.2,0.5,1.0,2.0,5.0,10.0 mmol/L) were used to treat the seeds of the two groups of ryegrass【. Result】 The results showed as follows: 1) Germination potential and germination rate of seeds in salicylic acid-free soaking group were not significantly affected by various concentrations of aluminum stress.When AlCl3 concentration reached 10.0 mmol/L,seed germination and germination rate were significantly inhibited in 0.5 mmol/L salicylic acid soaking group. 2) The seed bud length and root length of both groups decreased significantly with the increase of AlCl3 treatment concentration; 3) With the increase of Al stress concentration,the activities of SOD,CAT and POD of perennial ryegrass seeds in salicylic acid free soaking group were inhibited.0.5 mmol/L sali- cylic acid soaking increased POD activity of perennial ryegrass seeds under Al stress,but did not increase SOD and CAT activities.【Conclusion】 Salicylic acid seed soaking could enhance POD activity of the antioxidant system of fe- rennial wild ryegrass under aluminum stress,but the promotion effect on seed gerination was not significant.