Effect of Anti-hotstressors on Serum Biochemical Indexes and Immunity of Finishing Pigs

three way crossbred[Duroc×(Landrace×Yorkshire)]finishing pigs(60kg)ewre divided into 5 groups randomly and each group had two replicates with 5 pigs per replicate.Pigs of control group were fed basal diet and other groups were fed diets supplemented with 500mg/kg vitamin C,200mg/kg vitamin E,10mg/kg daidzein or 400mg/kg taurine respectively.The following were the results of the experiment lasting 39 days:The serum urea nitrogen concentration of each treatment group was not significantly different from that of control group (P0.05).The serum glucose concentration of each treatment guoup was lower than that of control group(P0.05).The concentration of HCO - 3,buffer base and base excess in serum of vitamin C or vitamin E or taurine was accordingly increased from the control group.The serum Cortisol concentration and the CD + 4/CD + 8 ratio in serum of each treatment group was lower than that of control group(P0.05).It was concluded that vitamin C and vitamin E and daidzein and taurine had better effect on the serum biochemical indexes and immunity of finishing pigs in a high temperature environment.