不同剂型维生素E对肉鸡生长性能、血清生化和抗氧化功能的影响

Effects of Different Types of VE on Growth Performance,Serum Biochemical Parameters and Antioxidant Capacity in Broilers

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20IU／kg普通VE（VE组）和20IU／kg微囊化VE（MVE组）。试验期为42d，分别于肉鸡21d和42d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21d的生产性能均无显著影响（P〉0．05），但MVE组肉鸡22～42d和1～42d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21d和42d血清的尿素氮水平（P〈0．05），且血清肌酐水平在21d时有下降趋势（P=0．09），血清碱性磷酸酶含量在42d时有升高趋势（P=0．09）。3）21d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）；42d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）21d时，VE和MVE组血清VE含量相对于CON组有升高趋势（P=0．08）；42d时，与CON组相比，日粮中添加MVE显著提高了血清总超氧化物歧化酶和谷胱甘肽过氧化物酶活性（P〈0．05），VE组无显著差异（P〉0．05）。目粮添加微囊化VE（MVE）能够改善肉鸡的生长性能，提高肉鸡体内的蛋白质合成代谢功能，并能够提高肉鸡的血清抗氧化能力。

The aim of this study was to explore and compare the effects of ordinary vitamin E （VE） and microencapsulated VE （MVE） on the growth performance, serum biochemical parameters and antioxidant capacity in broil- ers. A total of 360 one - day - old AA broilers were randomly divided into three groups with six replicates of twenty birds each. The control group was fed with basal diet （ CON group） and the other two groups were fed with basal diet supplemented with 20 IU/kg common VE （VE group） and basal diet supplemented with 20 IU/kg microencapsulated VE （ MVE group） , respectively. The experiment lasted for 42 days. At 21 d and 42 d of the experiment, six broilers each group were selected and slaughtered. The blood samples were collected to determine the serum biochemical pa- rameters and antioxidant capacity. The results showed that： 1 ） compared with the CON group, VE group and MVE group have no significantly influence to the dorking 21d production performance （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） The serum vitamin E content of VE and MVE groups tended to increase （P =0.08 ） in 21 d of broilers compared to the CON group. MVE group significantly in- creased the serum T - SOD and GSH - Px activities than the CON group （P 〈 0.05 ） in 42 d of broilers. Diet supplemented with microencapsulated VE could improve growth performance, and increase the function of protein synthesis and serum antioxidant capacity of broilers,