The studies were performed on Dekalb White cross-breeding chickens in laboratory conditions at the Far Eastern Zone Research Veterinary Institute. Two groups were formed: the control group received the main diet PK 3-29, and the experimental group received a rosehip supplement of 4% of the feed weight. The biochemical composition of blood serum was studied, characterizing protein metabolism (total protein and its fractions, creatinine), lipid-carbohydrate metabolism (cholesterol, triglycerides, glucose), mineral metabolism (calcium, inorganic phosphorus, magnesium), and the functional state of the liver (bilirubin, aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase). At the initial stage of the experiment, deviations in blood parameters from normal values were detected in the chickens of the control and experimental groups. Thus, the excess of the normal amount of total protein and albumin was recorded by 5.1 and 10.2% and by 36.5 and 41.0% with a reduced concentration of α-globulins by 16.4 and 23.8%, β-globulins by 21.8 and 31.3% with an increase in the percentage of γ-globulins by 7.3 and 10.7%, respectively. Hypoglycemia was noted by 17.4 and 19.7%, respectively. The bilirubin concentration exceeded the norm by 26.3%. ALT activity was above the norm by 39.5 and 63.2%, the level of AST activity did not reach its values by 7.8 and 8.5%, the activity of alkaline phosphatase was reduced by 13.4 and 29.9%, respectively. At the end of the experiment, in comparison with the control, the experimental group birds showed an increase in alkaline phosphatase by 36.1%, the amount of phosphorus by 35.3%, the concentration of total protein by 22.2%, β-globulins by 28.4%, and a decrease in AST by 11.1%, ALT by 8.6%, and cholesterol by 17.5%. The introduction of a rosehip-based herbal supplement into the diet of egg-laying chickens did not negatively affect the bird's body. At the same time, it was found that the supplement has a positive effect on the bird's metabolism, including lipids, carbohydrates, minerals, and proteins.

Mansurova Mariya S., Zalyubovskaya Elena Yu., Ostyakova Marina E.

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