不同剂型维生素E对肉鸡生产性能、血清生化指标和抗氧化能力的影响

研究比较维生素E(VE)和微囊化VE(MVE)对肉鸡生产性能、血清生化指标和抗氧化能力的影响。试验选用1日龄AA肉仔鸡360只,随机分成3组,每组6个重复,每个重复20只。对照组(CON组)饲喂基础日粮(不添加VE),试验组分别在基础日粮中添加20 IU/kg普通VE(VE组)和20 IU/kg微囊化VE(MVE组)。试验期为42 d,分别于肉鸡21 d和42 d时,测定生产性能,并采取血样,测定血清生化指标和抗氧化指标。结果表明：(1)与CON组相比,VE和MVE组对肉鸡21 d的生产性能均无显著影响(P > 0.05),但MVE组肉鸡22~42 d和1~42 d的平均日增重均显著提高(P < 0.05)。(2)与CON组相比,VE和MVE组显著降低了肉鸡21 d和42 d血清的尿素氮水平(P < 0.05),且血清肌酐水平在21 d时有下降趋势(P = 0.09),血清碱性磷酸酶含量在42 d时有升高趋势(P = 0.09)。(3)21 d时,MVE组血清总蛋白和球蛋白显著高于CON组(P < 0.05),VE组无显著差异(P > 0.05)；42 d时,与CON组相比,MVE组血清总蛋白和白蛋白显著提高(P < 0.05),VE组无显著差异(P > 0.05)。(4)与CON组相比,日粮中添加MVE显著提高了血清T-SOD和GSH-Px活性(P < 0.05),VE组无显著差异(P > 0.05)。结论：日粮添加微囊化VE能够改善肉鸡的生产性能,提高肉鸡体内的蛋白质合成与代谢功能,并能够提高肉鸡的血清抗氧化能力。

Effects of different formulations of VE on growth performance, serum biochemical parameters and antioxidant ability in broilers

The aim of this study was to explore and compare the effects of ordinary vitamin E (VE) and microencapsulated VE (MVE) on growth performance, serum biochemical parameters and antioxidant ability in broilers. A total of 360 one-day-old AA broilers were randomly divided into three groups with six replicates of twenty birds each. A control group with basal diet (CON) was used and the other two groups were basal diet supplemented with 20 IU/kg common VE (VE group) and basal diet supplemented with 20 IU/kg microencapsulated VE (MVE group). The experiment lasted for 42 days. At 21 d and 42 d of the experiment, six broilers each group were selected and killed. The blood samples were collected to determine the serum biochemical parameters and antioxidant capacity. The results showed that: (1) Compared with the CON group, MVE group significantly increased average daily gain of 21 to 42 d period and hole feeding period (P < 0.05). (2) Compared with the CON group, VE and MVE groups reduced urea nitrogen level in the serum of broilers (P < 0.05). Creatinine level in the serum of VE and MVE groups had a downward trend (P = 0.09) in 21 d, as well as alkaline phosphatase in the serum tended to increase in 42 d. (3) The serum total protein and globulin of MVE group were significantly higher than the CON group (P < 0.05) in 21 d, and VE group had no significant difference (P > 0.05). Compared with the CON group, the serum total protein and albumin of the MVE group were significantly increased (P < 0.05) in 42 d, and the VE group had no significant difference (P > 0.05). (4). Compared with the CON group, MVE group significantly increased the serum T-SOD and GSH-Px activities in 42 d (P <0.05) of broilers. Conclusion: Supplementation with microencapsulated VE could improve growth performance, and increase the function of protein synthesis and serum antioxidant ability of broilers,