The study results of effect of selenium and zinc nanoaquachelates with vitamin E on hematological parameters of Lohmann Brown breed laying hens of the are presented in this paper. Еhe blood system is the most sensitive system of the body in the changing supply of diet nutrients. In addition to the protein and energy supply of the diet, the availability of chemical elements has a significant effect on the development of blood cells. In the literature have been reported of changes in the bird’s body with hyposelenosis, reduced zinc and other trace elements. It may be promising to adding the biogenic metals of Se and Zn with vitamin E into the diet of laying hens in this regard. The experiment conducted on Lohmann Brown breed laying hens at the age of 40 weeks. Four groups of chickens were selected, with 20 heads each. Poultry of the control group I received a basic diet balanced throughout the course of the experiment, and selenium, zinc, and vitamin E nanochelates were added to the diet of the experimental groups to the diet in different doses and combinations. Blood sampling and hematologic studies (erythrocyte count, leukocyte count and hemoglobin content) were performed according to conventional rules and methods. It was found that the addition of zinc and selenium nanocheates to the diet with vitamin E increased the count of erythrocytes in the test hens by the 60th and 90th days of the experiment by 10.2–16.1 % and 11.2–18,0 % respectively. The content of blood hemoglobin of experimental laying hens compared with control increased significantly on the 60th and 90th day of the study by 2.75 and 4.40 %. This the positive effect of zinc and selenium nanochelates feeding along with vitamin E on such an important blood count as hemoglobin demonstrates. The greatest positive effect is shown by the feeding of the complex Se (30 ml/kg) + Zn (30 ml/kg) + vitamin E (40 mg/kg) per day
erythrocytes, leukocytes, hemoglobin, laying hens, nanoaquachelates, selenium, zinc, vitamin E