Except ATM of cottonseed meal and corn starch and TME of cottonseed meal,AME and TME of the rest feedstuffs for drake were significantly higher than those for cockerels.

• AME除棉粕和玉米淀粉鸭与鸡差异不显著外(P>0.；05)；其余7种饲料AME鸭都比鸡高;