微生态制剂对肉鸡生长性能、免疫功能、肠道菌群及血清生化指标的影响

为研究微生态制剂对肉鸡生长性能、免疫功能、肠道菌群及血清生化指标的影响,试验选用1日龄AA肉仔鸡800只,随机分为5组,每组8个重复,每个重复20只.对照组肉鸡饲喂基础日粮,微生态制剂组在基础日粮中依次添加剂量0.1％、0.2％、0.4％、0.6％的微生态制剂,试验期42 d.结果显示:与对照组相比,日粮中添加0.2％...

Effects of microecological preparations on growth performance,immune function,intestinal flora and serum biochemical index of broilers

In order to study the influence of microecological preparations on growth performance, immune function and intestinal flora of broilers, 800 one-day-old AA broilers were randomly divided into five groups: control group,microecological preparation group 1, microecological preparation group 2, microecological preparation group 3 and microecological preparation group 4. There are eight repetitions in each group and 20 repetitions in each. The control group was fed the basic diet, and the microecological preparation group was added with doses of 0.1%, 0.2%, 0.4%, and0.6% in order, and the test period was 42 d. The results showed that compared with the control group, the addition of0.2%, 0.4% and 0.6% microecological preparations in the diet significantly increased the weight of broilers(P<0.05), and the average daily weight gain of microecological preparation groups was significantly higher than that of control group. In the control group(P<0.05), the addition of 0.2%, 0.4% and 0.6% of microecological preparations in the diet significantly reduced the feed-to-weight ratio(P<0.05). The addition of microecological preparations in the diet could increase the level of IgG, and the IgG level of 0.4% microecological preparation group was significantly higher than that of control group(P<0.05). Compared with control group, the addition of 0.2%, 0.4% and 0.6% microecological preparations in the diet could significantly reduce the number of E. coli and Salmonella(P<0.05), and the effect of the 0.4% addition group was significantly better than other addition groups(P<0.05). The addition of 0.2%, 0.4% and 0.6% microecological preparations in the diet can significantly increase the number of Lactobacillus and bifidobacteria(P<0.05). Adding 0.2%,0.4% and 0.6% of microecological preparations to the diet can significantly increase the total serum protein content and reduce the blood sugar content(P<0.05). The experiment indicated that the addition of micro-ecological preparations to the basic feed can significantly improve the growth performance of broilers, improve the body’s immunity, and improve the structure of the intestinal flora, and the optimal dosage is 0.4%.