茶多酚对高酒糟日粮肉鸡生产性能和抗氧化特性的影响

本研究旨在评估添加茶多酚对高酒糟(distillers dried grain with solubles DDGS)日粮肉鸡生产性能和抗氧化特性的影响。将400只21日龄肉鸡随机分为5个处理,每个处理4个重复,每个重复20只。正对照组为玉米-豆粕型日粮,负对照组为玉米-豆粕-DDGS型日粮(15%DDGS),处理组分别在负对照日粮中添加100、300、500 mg/kg茶多酚。结果表明,与正对照组相比,后期日粮中添加15%DDGS对肉鸡生产性能无显著影响(P>0.05),但血液的GSH-Px降低8.31%(P<0.01),胸腿肉T-AOC含量降低,腿肉MDA值显著升高(P<0.05)。添加茶多酚提高了血液的T-AOC和GSH-Px活性(P<0.05)。随着茶多酚添加剂量的升高,T-AOC和GSH-Px有升高的趋势,但各水平组之间差异不显著;茶多酚添加300 mg/kg以上能显著降低胸腿肌MDA值(P<0.05),提高T-AOC含量,改善肉质的抗氧化特性。本研究结果表明,在肉鸡高DDGS日粮中添加茶多酚可以改善肉鸡机体及肉质的抗氧化特性。

Effects of dietary tea polyphenols on growth performance and antioxidant activity in broilers fed with high levels of DDGS diets

This study was to evaluate the effect of dietary tea polyphenols(TP) on growth performance and antioxidant performance in broilers.A total of 400 broilers at 21-day-old were assigned to 5 treatments with 4 replicates of 20 birds.Positive control was corn-soybean meal diet,negative control was corn-soybean-DDGS meal diet(15% DDGS) and treatments were supplemented with 100,300 and 500 mg/kg TP,respectively.The results showed that compared to positive control,the addition of 15% DDGS had no significant influence on growth performance of broilers,while GSH-Px level decreased by 8.31%(P>0.05);T-AOC levels of thigh and breast meat decreased slightly(P>0.05);TP supplementation improved blood T-AOC,GSH-Px activity(P<0.05),but there were no significant differences among different TP levels.More than 300 mg/kg TP could significantly decrease MDA of breast and thigh meat(P>0.05) and improve T-AOC levels.The results of current research suggested that dietary TP supplementation could improve antioxidant activity in body and meat of broilers fed with high levels of DDGS diets.