In the in vivo study, four hundred and eighty Cherry Valley commercial ducks, 1 day old, were randomly allocated to four treatments for 42 days, which included: 1) Basal diet (control);

• 480羽1日龄樱桃谷商品代肉鸭,按饲养试验要求随机分为4组:1)对照组为基础日粮;