茶多酚对热应激肉鸡生长性能和抗氧化能力的影响

Effects of Tea Polyhenols on Growth Performance and Antioxidant Capacity of Heat-Stressed Broilers

为研究茶多酚对热应激肉鸡生长性能和抗氧化能力的影响,选取35日龄817肉鸡160只,采用2×2析因设计,随机分为4组,分别为常温组、常温+0.04%茶多酚组、热应激组、热应激+0.04%茶多酚组,热应激肉鸡温度控制在(32±1)℃,试验期14d。结果显示:与常温组相比,热应激组肉鸡末体重、平均日采食量和日增重显著降低,料重比升高(P<0.05);血清和胸肌中T-AOC、GSH-Px、SOD、CAT活性显著降低,MDA含量显著升高(P<0.05)。与热应激组相比,热应激+茶多酚组肉鸡生长性能无显著性差异(P>0.05);血清和胸肌中T-AOC、GSH-Px、SOD活性显著升高(P<0.05),而MDA含量及胸肌中CAT活性无显著性差异(P>0.05)。由此可见,在热应激状态下,饲粮中添加茶多酚可一定程度地改善肉鸡抗氧化能力。

In order to study the effects of tea polyhenols on growth performance and antioxidant capacity of heat-stressed broilers.160 thirty-five day old 817 broilers were divided into four groups randomly according to 2×2 factorial design,which consisted of normal temperature group,normal temperature+0.04%TP group,heat-stressed group,heat-stressed+0.04%TP group.Heat-stressed broilers were reared in high ambient temperature at(32±1)℃,the whole experiment period was 14 days.The results showed as follows:1)Compared with normal temperature group,the final body weight,average daily feed intake and daily gain significantly decreased,feed conversion ratio significantly increased(P<0.05),the activities of T-AOC,GSH-Px,SOD and CAT significantly decreased,the content of MDA significantly increased in serum and pectoralis of heat-stressed group(P<0.05).2)Compared with heat-stressed group,the activities of T-AOC,GSH-Px and SOD significantly increased(P<0.05),but growth performance,the content of MDA in serum and pectoralis,and the activitie of CAT in pectoralis non-significantly difference of heat-stressed+0.04%TP group(P>0.05).In conclusion,the basal diet supplemented with tea polyhenols may improve antioxidant capacity to some extent of heat-stressed broilers.