The invention relates to the technical field of
saline-
alkali soil development and utilization and provides a method for improving
salt resistance of alfalfa. The method comprises the following specific steps: (1) planting alfalfa, namely A, selecting seeds; B, performing
soil treatment; C, seeding; (2) performing cultivation management, namely A, applying
glycine betaine solution to roots, preparing the
glycine betaine solution into a concentration of 5mmol / L, and applying at the
seedling stage according to an amount of 100kg per mu; B, performing
irrigation and fertilization, and fertilizing and irrigating at the critical growing stage. According to the method disclosed by the invention, multiple salt controlling and inhibiting agronomic measures such as selection of salt-resistant varieties, deep cultivation, deep cultivation and turnover of straws, balanced fertilization and the like are taken together, the technology of applying the
glycine betaine to the roots is combined, the
salt resistance of the alfalfa is effectively improved, and the method is easy and convenient to operate, fast in
efficacy, high in
operability, low in cost and capable of effectively promoting alfalfa production increase in the
saline-
alkali soil.