Effects of Taurine on Growth Performance and Anti-oxidative Ability of AA Broilers

The experiment was conducted to study the effects of different taurine levels on growth performance and anti-oxidative ability of AA broilers. One hundred and eighty healthy AA broilers were randomly divided into 6 treatments with 6 replicates,and each replicate contained 6 broilers. All the broilers were fed corn-soybean meal basal diets supplemented with 0,0.05%,0.10%,0.15% and 0.20% taurine,respectively. At day 5 and day 21,the activities of GSH-Px,SOD,T-AOC and content of MDA were measured. The experiment lasted for 21 days. The results showed as follows,1) in the AA broiler diets,supplementation of 0.10% and 0.15% taurine significantly improved average daily gain,and reduced the ratio of feed to gain (P0.05); 2) at day 5,the groups adding with 0.10% and 0.15% taurine had the highest activitise of GSH-Px,SOD and T-AOC,and the lowest content of MDA in serum and liver; at day 21,the activitise of GSH-Px,SOD and T-AOC in serum and liver were the highest and the content of MDA was the lowest in the group added with 0.10% taurine; 3) the growth performance and anti-oxidant ability of broilers were decreased in the group added higher doze (0.20%) taurine. In conclusion,appropriate levels of taurine could improve the growth performance and anti-oxidative ability,but high taurine levels had negative effects,and the optimal level of broilers at 1～5 days of age was 0.10%~0.15%,and at 6～21 days of age was 0.10%,respectively.