CHANGE IN BLOOD COUNTS AND NONSPECIFIC RESISTANCE OF LAYING HENS UNDER THE INFLUENCE OF FEED ADDITIVES

Abstract

This article presents data taken from young hens and laying hens of the Highsex White and Highsex Brown egg-laying breeds. For the study, three experimental groups of 60 birds were formed, with the first two being experimental groups and the third being a control group. In the context of the active development of the poultry industry in agriculture, feeding is one of the most important factors in achieving high productivity and quality of the flock. In intensive poultry farming, the feeding regimen and feed additives play a crucial role in achieving high productivity and good reproductive qualities of the flock. Stressful factors in birds lead to a decrease in egg production and live weight gain. In particular, the use of feed contaminated with mycotoxins is considered one of the main reasons for the lack of production and the deterioration of its quality. The results of the conducted studies showed that the feed additives "Vilomiks" and "Suvar" increase the hemoglobin content and lysozyme activity in the bird's blood, within the physiological norm, compared to the control group of chickens, which indicates an increase in the nonspecific resistance of the young and laying hens in industrial poultry farming. By the age of six months, the hemoglobin level increased and reached a value of 103.13±1.46** g/l in the first experimental group, 96.50±1.12** g/l (P<0.01) in the second compared with the control, and lysozyme activity in the blood serum of chickens varied depending on the age of the bird in 6 months, respectively 5.3±0.03***% (P<0.001) and 5.19±0.02**% (P<0.01).