2.Cherry Valley SM2 parentstock flock consisted of 3 122 ducks of the same age was divided into four groups, which were forced to moult by two methods at 60 weeks and 66 weeks respectively.
3.hree methods of restricted feeding,including methods of feeding at interval of a day,of restricted feeding per day and of feeding on “tuesday and friday”,were used. The effects of these methods on the uniformity of AA birds of parentstock at ages of 6th to 17th week were observed.
