饲喂乳酸菌和茶多酚对肉鸡生长及生理生化的影响

试验旨在研究乳酸菌、茶多酚对肉鸡生长性能、血液生化指标及肠道微生物的影响。选取1日龄AA肉仔鸡480羽，随机分成8组，每组60羽，设6个重复，每个重复10羽，在饲喂基础日粮的前提下，试验组灌胃乳酸菌和茶多酚，对照组灌胃无菌水，试验期为56天。结果表明：1.0 mL∕(kg.bw)]乳酸菌＋0.06 g∕(kg.bw)]茶多酚组的肉鸡末体重最高、平均日增重最快、平均日采食量最少、料重比最小；各试验组均降低了肉鸡的LDL（低密度脂蛋白胆固醇）、GLU（血糖）、TG（甘油三酯）、CHO（总胆固醇）、HDL（高密度脂蛋白胆固醇）的浓度，促进了乳酸菌、酵母菌等优势菌的生长，抑制了肠球菌的繁殖，为开发新产品、研究新的动物饲料添加剂提供了理论依据。

Effects of Tea Polyphenols and Lactobacillus by Gavage on Growth and Physiological and Biochemical in Broiler

This experiment was conducted to study the effects of tea polyphenols and lactobacillus on physiological and blood biochemical indexes and intestinal microflora in broiler. Four hundred and eighty broilers were selected and randomized into eight groups, there were sixty broilers in each group which was consisted of six replicates, ten broilers were set in each replicate. Except for giving basic feed, the test groups were given lactobacillus and tea polyphenols by gavage while the control group was given sterile water under the same condition. The whole experiment lasted for 56 days. The results indicated that the highest final weight was the broilers in the test group which was fed with 1.0 mL/(kg.bw)] lactobacillus plus 0.06 g/(kg.bw)] polyphenol, and its average daily gain was the fastest, the average daily feed intake was the least, feed weight ratio was the lowest. The LDL, GLU, TG, CHO, HDL concentration of broilers in test groups were all decreased, which promote the growth of the dominate bacteria like lactobacillus and yeast and inhibit the multiplication of enterococcus in enteric canal. It gives the theoretical basis to the development of new products and feed additives.