Effect of different zinc sources on production performance and immunity on early stage of broilers

Avine broilers were allotted at random into 3 groups with 5 replicates, 5 chickens in each replicate. The chickens of group 1 were fed with cone soybean basal diet and group 2 and 3 were supplemented with zine in 40 mg/kg in zinc sulfate and zinc methionine to investigate the effect of different zinc sources on their production performance and immunity. The results showed that supplementing zinc in basal diet could enhance broilers body weight at 14, 21 day and improve feed conversion efficiency. Zn methionine was better than zinc sulfate. Zinc contents in tibia and pancreas were elevated by supplementing different forms of zinc. Chickens supplemented with Zn methionine grew faster than those supplemented with zinc sulfate. There were no significant difference of serum zinc content and AKP activity among three groups (P0 05). ANAE + was increased on 7 day supplemented with zinc sulfate or Zn methionine (P0 05). ND value, immunity organ indexes and alexin C3 showed no difference between different treatments of zinc sources (P0 05).