heat flush
2.3. In flush and mating period, the heat cycle of ewes for levelⅠ, Ⅱand Ⅲoccurred at 18.60d, 13.25d and 10.71d after weaning when the average LW of three groups ewes were 46.06kg, 46.44kg and 53.71kg, the increment of liveweight compared with that in weaning were 1.35kg, -0.41kg and 2.00kg respectively, the ratio of ewe in estrus were correspond to 83.33%, 80.00% and 100.00%, the fertility rates of ewes were 100%, 100% and 85.71%.
