The use of Vitatonik feed additives and Bio-S3 probiotic on the productivity and resistance of laying hens

Samarkand State University of Veterinary Medicine, Livestock and Biotechnologies, M.Ulugbek st 77, 140103 Samarkand, Uzbekistan

^* Corresponding author: norboyevich@inbox.ru

Abstract

The experiments were carried out on chickens of 26-28 weeks of age of the Lohmann Brown-Classic breed. The chickens of the control group were given compound feed used on the farm. Chickens of the 1st experimental group were given an additional 12 g of monocalcium phosphate per 1 kg of compound feed and fed the Vitatonik feed additive with water at a dose of 1 ml per 1 liter of water for 5 days with a break of 10 days. Chickens of the 2nd experimental group were given the probiotic Вio- 3S at a dose of 1 g/kg of feed in addition to prophylactic agents of the 1st experimental group. The best results were obtained in chickens of the second experimental group, in which, compared with the control group, an increase in the level of hemoglobin in the blood by 6.8 g/l, glucose by 0.56 mmol/l, in the blood serum of total protein by 1.0 g / l. The content of retinol in the egg yolk of hens of the second experimental group increased by an average of 1.34 µg/g compared to the control group during the experiments, carotenoids by 4.0 µg/g. The proposed method of group prevention had a positive effect on the indicators of the body's resistance. In chickens of the 2nd experimental group, the indicators of BABS increased by 3.18%, LABS by 1.98%, PABN by 1.02% compared with the initial data, and in chickens of the control group, no noticeable changes were observed in terms of natural resistance.