Effects of Fermented Feed without Antibiotic on Growth Performance,Intestinal Flora,Blood Biochemical Parameters and Immune Function of Weaner Piglets

This experiment was conducted to study the effects of fermented feed without antibiotic on growth performance,intestinal flora,blood biochemical parameters and immune function of weaner piglets. A total of 120 weaner piglets with an average body weight of 9. 5 kg were randomly divided into 4 treatments with 3 replicates per treatment and 10 pigs per replicate. Pigs in control group were fed a basal diet( with antibiotic), and pigs in experimental groups were fed the experimental diet with the fermented feed without antibiotic replacing the basal diet of 10%,20% and 30%,respectively. The experiment lasted for 34 days. The results showed that compared with control group,the average daily gain in 20% fermented feed without antibiotic group was increased by 6. 37%( P 0. 05),and the ratio of feed to gain was decreased by 5. 54%( P 0. 05),and diarrhea rate was decreased by 63. 63%( P 0. 05). The fecal Lactobacillus number in 20% fermented feed without antibiotic group was significantly higher than that in control group at early and middle stage( P 0. 05),and the fecal Escherichia coli number of fecal was significantly lower than that in control group at early and middle stage( P 0. 05). The activity of alkaline phosphatase and the contents of glucose, total protein,and immunoglobulin G in serum in 20% fermented feed without antibiotic group were significantly higher than those in control group( P 0. 05),while the serum urea nitrogen content was significantly low-er than that in control group( P 0. 05). The apparent digestibility of crude protein and crude fiber in 20% fermented feed without antibiotic group was significantly higher than that in control group( P 0. 05). In conclusion,the fermented feed without antibiotic can improve the growth performance,regulate the balance of intestinal flora and enhance immune function and digestibility of weaner piglets.