Abstract: This paper studied the effect of salt water irrigation on alfalfa biology characters under the condition of the salt water experiment of seven levels. Research results showed that the alfalfa heights were shorter in the first branch stage,full branch stage and first flower stage with the salt concentration becoming higher. And with the alfalfa became older,the ability of salt tolerance was stronger. In the first flower stage,the salt water irrigation of high salt content hinder the growth of alfalfa strongly,but the low salt content water has weak action to the growth of alfalfa.And the stern leaf ratio become bigger and the quality was low when irrigated by high salt content water. The low salt content water can hinder the regeneration speed,but the otherness can't reach the significant level(P > 0. 05).

Key words: Alfalfa, Salt water irrigation, Biology character, Regeneration speed

CLC Number: 

• S274.1