Abstract The aim of the present study was to evaluate the effect of bile salts on the growth performance, carcase estimates, immunity and antioxidant measurements, some blood biochemical parameters, intestine enzyme activities and microbiology of broiler chickens. One hundred twenty 1 day old of Ross 308 broiler chicks were randomly assigned to 4 treatments with 5 replicates of 6 chicks each for 42 days. The first group was the basal diet only and served as control. The second, third and fourth groups were fed the basal diet plus 0.5, 1 and 1.5 ml bile salts/kg diet, respectively. Body weight and daily body weight gain were linearly (p < .01) increased with increasing bile salt levels compared to control. Addition of bile salts to broiler diets significantly (p < .01) decreased feed intake and improved feed conversion than control. The addition of 1.0 ml bile salts to broiler chicks' diets increased plasma proteins concentrations, total antioxidant capacity and superoxide dismutase compared with the control group. The cholesterol and triglyceride levels, liver enzymes and intestinal enzymes (amylase, protease and lipase) activities were significantly (p < .05 or 0.01) increased in bile salt groups. While, malondialdehyde was significantly (p < .01) decreased in all treated groups compared to control. Total bacteria, total fungi, Escherichia coli and Salmonella were decreased in broiler chicks fed diet supplemented with bile salts. It could be concluded that bile salts especially levels (0.5 and 1.0 ml/kg diet) have a positive impact on growth performance and carcass traits, blood biochemical measurements, intestinal enzymes activities, digestibility of nutrients and microorganism's content of broiler chicks. Highlights Addition bile salt to broiler diets improved growth rate and feed conversion. Addition bile salt to broiler diets improved nutrients digestion. The addition of 1.0 ml bile salts in broiler diets increased total antioxidant capacity and superoxide dismutase. Total fungi, Escherichia coli and Salmonella were decreased in chicks fed diet supplemented with bile salts

中文翻译：

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日粮添加胆汁盐对肉鸡生长性能、胴体、免疫和抗氧化参数以及细菌学的影响

摘要 本研究的目的是评估胆汁盐对肉鸡生长性能、胴体估计、免疫和抗氧化测量、一些血液生化参数、肠酶活性和微生物学的影响。120 只 1 日龄的 Ross 308 肉鸡被随机分配到 4 个处理组，每组 6 只小鸡 5 个重复，共 42 天。第一组仅为基础饮食并作为对照。第二组、第三组和第四组分别饲喂基础饲料加 0.5、1 和 1.5 ml 胆盐/kg 饲料。与对照相比，体重和每日体重增加随着胆汁盐水平的增加呈线性增加 (p < .01)。与对照相比，在肉鸡日粮中添加胆汁盐显着（p < .01）降低了采食量并提高了饲料转化率。与对照组相比，在肉鸡日粮中添加 1.0 ml 胆汁盐可增加血浆蛋白浓度、总抗氧化能力和超氧化物歧化酶。胆汁盐组的胆固醇和甘油三酯水平、肝酶和肠酶（淀粉酶、蛋白酶和脂肪酶）活性显着增加（p < .05 或 0.01）。同时，与对照组相比，所有治疗组的丙二醛显着降低（p < .01）。在饲喂添加胆盐的日粮的肉鸡中，总细菌、总真菌、大肠杆菌和沙门氏菌均减少。可以得出结论，胆汁盐尤其是水平（0.5 和 1.0 毫升/公斤饮食）对生长性能和胴体性状、血液生化测量、肠酶活性、肉鸡的营养物质消化率和微生物含量。亮点 在肉鸡日粮中添加胆汁盐可提高生长速度和饲料转化率。在肉鸡日粮中添加胆汁盐可以改善营养物质的消化。在肉鸡日粮中添加 1.0 ml 胆汁盐可提高总抗氧化能力和超氧化物歧化酶。饲喂添加胆盐的日粮中的小鸡总真菌、大肠杆菌和沙门氏菌减少