Yang Y, Iji P A, Kocher A, Mikkelsen L L, Choct M
School of Rural Science and Agriculture, University of New England, Armidale, NSW, Australia.
J Anim Physiol Anim Nutr (Berl). 2008 Dec;92(6):650-9. doi: 10.1111/j.1439-0396.2007.00761.x.
A feeding trial was conducted to evaluate the effects of mannanoligosaccharide (MOS) on the growth performance, nutrient digestibility and gut development of broilers given a corn or a wheat-based diet over a 21-day experimental period. Dietary MOS improved the growth performance of birds given the wheat-based diet compared to that of birds given the corn-based diet during 7-21 days of age. In line with this, the ileal digestibility of starch was increased by MOS at 21 days of age. The addition of MOS modulated the development of gut microflora. From day 7 to day 21, the numbers of mucosa-associated coliforms along the small intestine were decreased; whereas the numbers of mucosa-associated lactobacilli were increased by MOS, regardless of the cereal type in the diets. Dietary MOS also reduced the counts of coliforms and Clostridium perfringens in the caeca of birds by 21 days of age. Villus height at the jejunum was not affected by MOS but the crypt depth and the muscularis thickness were reduced. The specific activities of maltase and alkaline phosphatase were increased in birds given the MOS-supplemented diet; whereas the development of leucine aminopeptidase was delayed by MOS. All these changes in the mucosal morphology and function were dependent on the type of cereal and/or the age of the birds.
进行了一项饲养试验，以评估甘露寡糖（MOS）对在21天试验期内以玉米或小麦为基础日粮的肉鸡生长性能、养分消化率和肠道发育的影响。与7至21日龄以玉米为基础日粮的肉鸡相比，日粮中的MOS改善了以小麦为基础日粮的肉鸡的生长性能。与此一致的是，21日龄时，MOS提高了淀粉的回肠消化率。MOS的添加调节了肠道微生物群的发育。从第7天到第21天，小肠沿线黏膜相关大肠菌的数量减少；而无论日粮中的谷物类型如何，MOS都增加了黏膜相关乳酸菌的数量。日粮中的MOS在21日龄时还减少了鸡盲肠中大肠菌和产气荚膜梭菌的数量。空肠绒毛高度不受MOS影响，但隐窝深度和肌层厚度减小。添加MOS的日粮组鸡的麦芽糖酶和碱性磷酸酶的比活性增加；而MOS延迟了亮氨酸氨肽酶的发育。黏膜形态和功能的所有这些变化取决于谷物类型和/或鸡的年龄。
