Study On Dietary Oligosaccharides In Piglet Diets

Two experiments were conducted to determine the effects of non-digestible oligosaccharides (NDOs) on performance and intestinal bacteria population of piglets, and elucidate the role of dietary NDOs as functional feed ingredients by compared with antibiotic and probiotic. In experiment 1, Ten litters of piglets were assigned to five groups randomly, with two litters per group. The control group was fed with corn-soybean basal diet. Oligosaccharides was added to the basal diet at the level of 0.05%, 0.1%, 0.2 % and 0.35% respectively to form four experimental diets. The experiment was conducted in two periods. The first period (suckling period) was from 7 to 28 days of age and the second period (weanling period) was from 28 to 56 days of age. Fresh faecal samples were collected at 21 days of age and assayed for Escherichia coli concentration, pH and moisture content. Three pigs per group were slaughtered at 42 days of age and cecum, colon, and rectum content samples were collected and assayed immediately for Escherichia coli and Bifidobacteriuni concentration, pH and moisture content. The results showed that dietary oligosacchrides decreased faecal Escherichia coli population and pH significantly (P<0.05), but did not affect performance and faecal moisture content in nursery phase. 0.1% oligosaccharides for weanling pigs increased growth and improved feed conversion ratio together with a reduction of diarrhea (P0.05) ,15.91% (P>0.05) ,15.32% (P>0.05) and decreased diarrheaby7.83% (P<0.01) ,8.68% (P<0.0I) ,8.35% (P<0.0l) respectively. At5? weeks, oligosacchrides, oligosaccbrides + chlotetracycline (25mg/kg diet) and oligosacchrides + chlotetracycline (12.5mg/kg diet) increased body weight gain by 9.55% (P> 0.05) , 48.84% (P < 0.05) , 38.74% (P < 0.05) and improved ratio of feed to gain by 0.21 (P<0.05),0.41(P<0.01),0.46(P<0.01) anddecreaseddiarrheabyl2.78%(P<0.01), 22.23% (P < 0.01) , 20.88% (P < 0.01) respectively. Probiotic decreased diarrhea by 4.82% (P < 0.05) at 0~? weeks and 4.95% (P < 0.05) at 5~? weeks, respectively. Chlotetracycline (50mg/kg diet) decresed diarrhea by 5.16% (P < 0.05) at 5? weeks. Body weight gain was unaffected by supplements of probiotic or chlotetracycline (50mg/kg diet). The results of determining the fresh faecal samples showed: oigosacchrides or oligosaccbrides + chlotetracycline had an enrichment to Bifidobacteria (P < 0.01) and a suppression to Escherichia ccli colonization (P <0.01) Master Candidate: Sbi Baoming Major: Animal Nutrition and Feed Science Supervisor: Prof Shan Anshan...