摘要
欧洲猪生产中抗菌饲料添加剂的禁用及对猪胃肠道微生物发酵的有益调控的研究 ,促进了非消化性寡糖的研究。非消化性寡糖 ,作为化学益生素最显著的作用就是对有益菌 ,如双歧杆菌的特殊的刺激作用 ,并通过竞争性排斥病源微生物如大肠杆菌的生长 ,抑制有害菌的作用 ,从而有助于保持胃肠道合适的菌丛。然而 ,猪日粮中包含的特异性非消化性寡糖对微生物生态系统、消化过程及动物的生产性能的作用存在着争议。由于大多数非消化性寡糖在胃和小肠中快速的发酵速率 ,因此上段消化道的糖分解活力不能在整个消化道中维持。若使用在整个胃肠道部分包括大肠能够发酵的非消化性寡糖的复合物可延长化学益生的作用 。
The ban of antimicrobial feed additives in pig production in Europe and the research on beneficial modification of microbial fermentation in the gastrointestinal tract promote the research on non digestible oligosaccharides(NDO).The most notable effect of NDO,also referred to as prebiotics,is their specific stimulation to beneficial bacterial,e.g.,bifidobacterial.They also suppress the growth of pathogenic bacterial though competitive exclusion the growth of pathogenic microorganisms,e.g.E.coli.,so they assist to maintain a desirable flora.However the relationship between the specific NDO in pig diets and their effect on microbial ecosystem,digestive progress and the growth performance of pigs is equivocal.Obviously,due to the rapid fermentation of most NDO in the stomach and small intestine,the saccharolytic activity in the upper digestive tract cannot be maintained though the whole digestive tract.So, it is suggested that use of the NDO that can be fermented though the whole gastrointestinal tract including the large intestine may prolong the prebiotic effects and prove effective as feed additive in pig diets.
出处
《国外畜牧科技》
2002年第1期20-25,共6页
Animal Science Abroad
