In order to analyze the effects of mannan-oligosaccharide(MOS) on the production performance,nutriments digestibility,pH and main microflora in caecum contents,0.05%,0.1%,0.2% and 0.4% MOS were added into cherry valley meat duck diets.

• 樱桃谷鸭日粮中分别添加0.；05%25、0