In order to promote the development of grass industry in the drought-hit area

the construction of the animal husbandry base

and the development ecological agriculture

to select the species of artificial herb with high regeneration

high output and high WUE

the yield

the speed and the water use efficiency of re-growing hay of twelve alfalfa cultivars from domestic and aboard are studied in 2001 and 2002. The results showed that re-growing speed of all introductions in the 2nd harvest was higher than the local cultivar Hui'ning

most of introductions were higher than local cultivar in 3rd harvest. The yield of all introductions were higher than local cultivar Huining. Algoquin

Emperor

Cimmaron

Siriver

WL-323Ml have high re-growing hay yield

high WUE and strong regeneration.