【摘要】 本试验旨在探讨玉米-豆粕型日粮中添加甜菜碱对肉仔鸡生产性能和免疫功能的影响。选用1日龄AA肉仔鸡180羽,随机分成3组,每组6个重复,每个重复10羽。对照组饲喂基础日粮,试验组分别在基础日粮基础上添加400 mg/kg和800 mg/kg甜菜碱。试验期42 d。结果表明:与对照组相比,日粮中添加800 mg/kg甜菜碱时,42日龄肉仔鸡体重、日采食量和日增重分别提高12.3%、10.2%和12.5%(P<0.05);日粮中添加400 mg/kg时,肉仔鸡代谢能和钙的表观代谢率分别提高1.8%和5.4%(P<0.05),添加800 mg/kg甜菜碱的能量、粗蛋白质、粗脂肪、钙和磷表观代谢率分别提高2.7%、6.1%、6.8%、9.4%、4.3%(P<0.05);甜菜碱有提高肉仔鸡胸肌率和腿肌率趋势(P>0.05),并可显著降低肉仔鸡腹脂率(P<0.05);400 mg/kg和800 mg/kg甜菜碱组肉仔鸡脾脏指数分别提高9.5%和11.9%(P<0.05),血液白细胞介素2(IL-2)分别提高9.7%和41.6%(P<0.05)。由此可见,饲粮中添加甜菜碱可提高肉仔鸡的生产性能,增强肉仔鸡免疫能力。更多还原

【Abstract】 The purpose of this study was to investigate the effects of betaine on production perfotmeance and immunity of the broiler.A total of 180 AA broiler were randomly allotted into 3 groups with 6 replicates of 10 each.The control group was fed with basal diet,the treatment groups were fed with basal diets supplemented with betaine at 400 mg/kg and800 mg/kg,respectively.The experiment lasted 42 days.The results showed as follows:Compared with the control group,the diets supplemented with 800 mg/kg betaine group were significantly improved the live weight(12.3%),daily feed intake(10.2%)and the average daily gain(12.5%)(P < 0.05);the metabolic rate of EE(6.8%),the apparent metabolic rate of energy(2.7%),CP(6.1%),Ca(9.4%)and P(4.3%)in the 800 mg/kg group were significantly increased(P < 0.05);the abdominal fat rate of broiler in experimenal groups were significantly decreased;spleen index in the treatment groups were significantly increased 9.5% and 11.9%,and IL-2 increased 29.7% and 41.6%(P < 0.05).In conclusion,the supplementation of broiler with betaine in diet had a positive impact on the production porfermence and immunity.更多还原