Experiments were carried out with turkey poults of the Ten 30 breed with the purpose to establish the changes in some hematologic and biochemical indices that had taken place under the influence of illumination intensity. It was found that the light regime influenced hemopoiesis as well as the intensity of metabolism. Both the hemoglobin content and the erythrocyte count were higher at illumination of higher intensity. The amount of the blood serum total protein and the vitamin A content of the liver under lower light intensity proved higher by the end of the experiments than in the controls. The weight of poults at lower intensity of light was 5--6 per cent higher, and the intake of forage per kilogram of weight gain was 150 g lower than with poults raiseatd higher intensity of illumination.
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