凝结芽孢杆菌对肉鸡生长性能、免疫器官指数、血清生化指标及肠道菌群的影响

发布时间：2019-01-06 15:34

【摘要】：本试验旨在研究凝结芽孢杆菌对肉鸡生长性能、免疫器官指数、血清生化指标及肠道菌群的影响。选择健康的1日龄AV500肉鸡10 000只,随机分成2组,每组5个重复,每个重复1 000只鸡。对照组饲喂基础饲粮,试验组饲喂基础饲粮+300 mg/kg凝结芽孢杆菌制剂。试验期6周。结果表明:1)1~21日龄、22~42日龄试验组肉鸡死淘率显著低于对照组(P0.05),分别下降了61.7%、52.42%;22~42日龄,试验组肉鸡的平均日增重、平均日采食量均显著高于对照组(P0.05)。2)21日龄试验组肉鸡的脾脏指数、胸腺指数、法氏囊指数均显著高于对照组(P0.05),而肠道指数却显著低于对照组(P0.05)。42日龄试验组肉鸡的脾脏指数、胸腺指数均显著高于对照组(P0.05)。3)21和42日龄试验组肉鸡血清中的丙氨酸氨基转移酶、碱性磷酸酶活性及总蛋白、球蛋白含量均显著高于对照组(P0.05)。4)21和42日龄试验组肉鸡盲肠、回肠食糜中凝结芽孢杆菌数量均显著高于对照组(P0.05),大肠杆菌数量均显著低于对照组(P0.05)。由此可见,饲粮中添加凝结芽孢杆菌可抑制肉鸡肠道中大肠杆菌的生长,提高免疫器官指数,降低死淘率。
[Abstract]:The purpose of this study was to study the effects of Bacillus coagulans on growth performance, immune organ index, serum biochemical index and intestinal flora of broilers. Ten thousand healthy 1-day-old AV500 broilers were randomly divided into 2 groups with 5 replicates in each group. The control group was fed with basic diet and the experimental group was fed with basic diet for 300 mg/kg. The experimental period was 6 weeks. The results showed that: 1) the death rate of broilers in the trial group was significantly lower than that in the control group (P0.05) at 21 days of age and 22 and 42 days of age (P0.05), with a decrease of 61.7% and 52.42% respectively; At 22 ~ 42 days of age, the average daily gain and average daily intake of the broilers in the experimental group were significantly higher than those in the control group (P0.05), and the spleen index, thymus index and bursa of Fabricius index in the 21-day-old group were significantly higher than those in the control group (P0.05). However, the intestinal index was significantly lower than that of the control group (P0.05). The spleen index and thymus index of the 42-day-old broilers were significantly higher than those of the control group (P0.05) and the serum alanine aminotransferase levels in the 21-day-old and 42-day-old broilers. The activity of alkaline phosphatase, the content of total protein and globulin were significantly higher than those of the control group (P0.05) and the number of Bacillus coagulans in the ileum chyme was significantly higher than that in the control group (P0.05). The number of Escherichia coli was significantly lower than that of control group (P0.05). It can be seen that the addition of Bacillus coagulans in diet can inhibit the growth of Escherichia coli in the intestine of broilers, increase the immune organ index, and reduce the rate of death and panning.
【作者单位】：湖北省农业科学院畜牧兽医研究所;动物胚胎工程及分子育种湖北省重点实验室;
【基金】：国家肉鸡产业技术体系(CARS-42-Z16) 湖北省科技创新团队项目(2016-620-000-001-028)
【分类号】：S831.5

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