Age dynamics of blood morpho-biochemical indicators in cross "Arbor aykrez" broiler chicken

The age dynamics of the morpho-biochemical blood parameters of broiler chickens of the "Arbor Aykrez" cross, kept in the technological conditions of the poultry farm, has been established. Morpho-biochemical parameters of the bird's blood change with age. In the blood of a day-old bird, the content of erythrocytes was 80.6±1.68 g/l, erythrocytes - 1.98±0.13×1012/l and leukocytes - 12.03±0.65×109/l. A significant increase in the content of hemoglobin and erythrocytes was noted on the 21st day of bird’s life by 12.2 and 32.2 %, which amounted to 90.4±1.36 g/l and 2.63±0.10×1012/l, respectively. On the 42nd day of life in broiler chickens, the hemoglobin content increased by 21 % in relation to the indicators of day-old poultry and reached 97.5±1.77 g/l, and the number of erythrocytes - by 63.6 % and reached 3.24±0.19×1012/l. The content of leukocytes significantly increased already on the seventh day of the bird's life by 48.5 % and amounted to 17.86±0.45×109/l. The number of leukocytes in the blood of a bird on the 21st day of life increased by 2.26 times, and on the 42nd day - by 2.64 times compared with the indicators of a day-old bird and amounted to 27.20±1.05×109/l and 31.77±0.90×109/l, respectively. In the leukocyte formula of day-old birds, pseudo-eosinophils predominate, the percentage of which was 57.2±1.13 %. From 14 days of age, the blood profile of the bird changes to lymphocytic, lymphocytes become the predominant cells, the content of which was 60.2±2.24 %. In the blood serum of one day old poultry, the level of total protein was 26.09±1.38 g/l, and on the 28th day this indicator increased by 20.97 % and amounted to 31.56±1.58 g/l. By the age of 42 days, the level of total protein is 36.87±0.92 g/l, which is 41.3 % higher than the indices of day-old poultry, which is typical for the postembryonic development of broiler chickens of other crosses.