瑞蕾苜蓿是八十年代初从美国引进的。1984年在上海滨海地区条件下,从春播到种子逐渐成熟第一个生活期需要120天左右,当年刈割4次,亩产鲜草达3,500公斤以上,翌年上半年刈割2次,亩产鲜草达2,500公斤左右,和我区试种的其它12种苜蓿品种相比增产20—30％。瑞蕾苜蓿系豆科苜蓿属多年生草本 Rui Lei alfalfa is imported from the United States in the early eighties. In 1984, in the coastal area of ​​Shanghai, it took about 120 days to grow from spring to seed. The first period of life needed to be cut for four times in the same year. The yield of fresh grass reached 3,500 kg per mu, and the first half of the following year was mowed twice. About 2,500 kilograms of fresh grass, and my district planted 12 other varieties of alfalfa yield 20-30%. Rui Lei alfalfa Medicago legume genus perennial herb