EN
The study was performed on 28 calves, aged 2-8 weeks, divided into 4 equal groups. The calves of the group I were given 500 mg of Zn in a water solution of ZnCh orally, once a day, for 4 weeks; calves of group II - the same dose of Zn and 2500 mg of Mg in a water solution of MgCl2 x 6H2O; calves of group III - only 2500 mg Mg (MgCl2 x 6H2O). The animals of group IV served as controls. The following parameters were assayed: the number of leukocytes, leukogram, percentage of phagocytic leukocytes, phagocytic index, and the enzymatic activity of alkaline phosphatase in sera. The administration of Zn and Mg for 4 weeks had a positive effect on the increase profitably of the percentage of phagocytic leukocytes and the value of phagocytic index in the blood of the calves. In contrast, Mg substantially stimulated the enzymatic activity of alkaline phosphatase in sera.