3.4. Zinc concentration determination of different zinc sources in duodenal sac
The results showed that the concentration of zinc in the duodenal sac. The concentration of zinc for organic zinc groups were greater (Po0.05) compared with ZnSO4 group. More over, compared with ZnSO4 group and ZnLys group, the greatest concentration of zinc was detected in the duodenal sac of birds assigned to the ZnMet treatment (Po0.05) (Table 2).