[Objective] The reserch amied to discuss the forage salt tolerance mechanisms and select the forage provided with the high ability of salt tolerance [Method] With the different salt concentrations treated, the biomembrane permeability and the changing rule of protective enzyme activity were studied. [Result] As the salt concentration increased, the forage biomembrane permeability was close interrelated with the MDA content, and the activicty of the catalase and the superoxide dismutase enzyme ascended first...