Abstract：This experiment was conducted to investigate the effects of β-glucan instead of antibiotics on growth performance, intestinal microflora and microbial amino acid decarboxylase activity of weaned piglets. Thirty 28-day-old healthy weaned piglets[(Rongchang×Yorkshire)×Landrace] were randomly divided into 3 groups with 10 replicates per group and 1 pig in each replicate. Pigs in the control group were fed a basal diet, those in the bacitracin zinc group were fed the basal diet supplemented with 100 mg/kg bacitracin zinc, and those in the β-glucan group were fed the basal diet supplemented with 400 mg/kg β-glucan. The experiment lasted for 28 days after 4 days adaption. The results showed that, compared with the control group, the growth performance and diarrhea index of weaned piglets in the β-glucan group and bacitracin zinc group were significantly increased (P<0.05), and the ratios of feed to gain in above two groups were significantly decreased (P<0.05). No significant differences were found in growth performance, diarrhea index and the ratio of feed to gain between the β-glucan group and bacitracin zinc group (P>0.05). Dietary β-glucan significantly reduced the activities of microbial tryptophan decarboxylase and lysine decarboxylase in ileum of weaned piglets compared with the bacitracin zinc (P<0.05). The activities of microbial methionine decarboxylase, ornithine decarboxylase and lysine decarboxylase in colon of weaned piglets in the β-glucan group and bacitracin zinc group were significantly decreased (P<0.05), while the tryptophan decarboxylase activity was significantly improved (P<0.05) compared with the control group. Dietary β-glucan didn't alter the dominant microbial flora in the colon, while improved the relative abundance of Lactobacillus, Veillonellaceae, Bacteroidetes, Firmicutes and Lachnospiraceae and reduced the relative abundance of harmful bacterium such as Clostridium, and this effect was equivalent to bacitracin zinc. In conclusion, supplementation with 400 mg/kg β-glucan can improve growth performance, reduce intestinal decarboxylase activity, improve the relative abundance of microorganisms and decrease the relative abundance of harmful bacterium in the colon of weaned piglets. The effects of β-glucan on promoting probiotics growth is better than bacitracin zinc.
陈庆菊, 刘金艳, 卢昌文, 马娅君, 唐志如. 饲粮添加β-葡聚糖对断奶仔猪生长性能和肠道微生物区系的影响[J]. 动物营养学报, 2018, 30(11): 4712-4720.
CHEN Qingju, LIU Jinyan, LU Changwen, MA Yajun, TANG Zhiru. Effects of Dietary β-Glucan on Growth Performance and Intestinal Microflora of Weaned Piglets. Chinese Journal of Animal Nutrition, 2018, 30(11): 4712-4720.
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