Abstract:

Abstract: Alfalfa is a drought resistant and more protein legume forage .Alfalfa growth and development is often impeded due to drought stress, which leads to a change in agronomic characteristics and physiology characteristics, and reduces in grass and seed yield, even lead to die. In this paper discuss and summarize the position of studied all over the world、morphologic、production、physiology、evaluation and improve drought resistant methods used by alfalfa.