The aim of this experiment is to investigate the effects of yeast selenium on the growth performance,slaughter performance,and serum antioxidant indicators of broiler chickens.1600 1-day-old white feathered broiler chickens were randomly divided into 4 groups,with 1 group consisting of 8 replicates and 50 chickens per replicate.The experiment was conducted in two stages:1～21 days and 22～42 days,with 0,0.1,0.2,and 0.4 mg/kg yeast selenium added as the experimental diet.The results showed that after 1～2 days,compared with the control group,the SY group with 0.2 mg/kg significantly increased FBW by 5.59%,ADG by 5.80%,and feed to weight ratio by 5.93%(P＜0.05);From 22 to 42 days,compared with the control group,the SY group with 0.2 mg/kg significantly increased FBW by 4.25%and ADG by 3.62%(P＜0.05);After 1～42 days,compared with the control group,the SY group with 0.2 mg/kg significantly increased ADG by 4.29%and significantly reduced feed to weight ratio by 4.66%(P＜0.05);In addition,SY had no significant effect on the ADFI of broiler chickens throughout the entire stage(P＞0.05).The addition of 0.2 mg/kg SY significantly increased the slaughter rate of broiler chickens(P＜0.05);The addition of 0.2 mg/kg SY significantly increased the breast muscle rate of broiler chickens(P＜0.05);The addition of 0.2 and 0.4 mg/kg SY significantly increased the dripping loss of leg muscles in broiler chickens(P＜0.05);The addition of 0.2 mg/kg SY significantly decreased the brightness of chicken leg muscles(P＜0.05).After 21 days,the T-SOD and GSH Px activities in the serum of broiler chickens were significantly increased(P＜0.05)with the addition of 0.2 and 0.4 mg/kg SY,while the T-AOC ability in the serum of broiler chickens with the addition of 0.2 and 0.4 mg/kg SY was significantly increased(P＜0.05),and the MDA content was significantly reduced(P＜0.05);After 42 days,the serum GSH Px activity of broiler chickens was significantly increased(P＜0.05)with the addition of 0.2 and 0.4 mg/kg SY,while the serum MDA content of broiler chickens with the addition of 0.2 mg/kg SY was significantly reduced(P＜0.05).
维普
万方数据
