Salinity and drought are two major abiotic factors limiting crop production and forageyield.In particular,with ingravescent fresh water scarcity,drought and soil salinity havebeen threatening the development of agriculture and animal husbandry,and even thesecurity of whole ecosystem in the arid and semi-arid areas of northwest China.Alfalfa(Medicago sativa L.) is one of the most important legume forages and acts a veryimportant role in the agriculture and animal husbandry,and the ecological construct...