ÓÄÊ 619:616.15:636.03:636.52/.58:661.155.3
DOI 10.33861/2071-8020-2024-3-38-42
Krasnoperov A. S., Oparina O. Yu., Malkov S. V., Belousov A. I., Vereshchak N. A.
Summary. Blood parameters and productivity of laying hens of all groups during the experimental period underwent changes characteristic of the dynamics of development and intensity of egg laying. By the middle of the experiment, an increase in hemoglobin values of 5.5% was observed in the birds of the experimental group that received the hepatoprotective composition, along with a decrease in the number of erythrocytes by 25.2%. By the end of the study, they returned to background levels. This indicated a positive effect on the intensity of oxygen and carbon dioxide exchange processes. In individuals of the control group, changes in erythrocytes and hemoglobin were more significant. The level of protein and its fractions also changed. The albumin-globulin ratio in the experimental group was the most stable throughout the entire study period. This corresponded to physiological and age-related values and may indicate normal protein-synthesizing function of the liver and the absence of disturbances in the absorption of proteins in the digestive tract. An increase in the level of end products of protein breakdown in the blood indicated the catabolic nature of metabolism. By the end of the 7th week of the experiment, the level of uric acid in individuals of the control group increased significantly - 1.7 times, and in the experimental group only 1.3 times compared to background values. This was confirmed by a decrease in the albumin/uric acid ratio in intact and experimental birds by 2.0 and 1.5 times, respectively. By the end of the experimental period, this process had the opposite direction. Background calcium values in both groups of laying hens exceeded the upper limit of reference values by 33.2%. Observations during the experiment of changes in the most important macronutrients: calcium, phosphorus, magnesium in the blood of chickens of the experimental group revealed their slight reduction compared to control individuals. The optimal Ca/P ratio was recorded in the experimental group of birds (from 2.21±0.20 to 2.35±0.19 units). Thus, the introduction of a hepatoprotective composition into the diet improved the level of mineral metabolism and metabolic processes in the body. As a result of the experiment, an increase in egg productivity was recorded in the experimental group. In terms of egg production and egg mass, the difference with the control group was 4.8% and 4.1%, respectively.
Keywords: laying hens, hepatoprotective composition, hematology, biochemistry, metabolism, protein metabolism, mineral metabolism, productivity, egg, egg mass.
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Author affiliation:
Oparina Olga Yu., Ph. D. in Veterinary Medicine, Senior Scientific Researcher of the Department of Ecology and Non-Infectious Pathology of the Ural Federal Agrarian Scientific Research Centre of the Ural Branch of the Russian Academy of Sciences; 112a, Belinskogo st., Ekaterinburg, 620142; phone: 8-912-6011634; e-mail: olia91oparina@yandex.ru.
Malkov Sergey V., Ph. D. in Veterinary Medicine, Senior Scientific Researcher of the Department of Ecology and Non-Infectious Pathology of the Ural Federal Agrarian Scientific Research Centre of the Ural Branch of the Russian Academy of Sciences; 112a, Belinskogo st., Ekaterinburg, 620142; phone: 8-912-2485082; e-mail: aibolit_2001@mail.ru.
Belousov Aleksandr I., D. Sc. in Veterinary Medicine, Senior Scientific Researcher of the Department of Ecology and Non-Infectious Pathology of the Ural Federal Agrarian Scientific Research Centre of the Ural Branch of the Russian Academy of Sciences; 112a, Belinskogo st., Ekaterinburg, 620142; phone: 8-908-6390771; e-mail: white-knight@mail.ru.
Vereshchak Natalya A., D. Sc. in Veterinary Medicine, Leading Scientific Researcher of the Department of Ecology and Non-Infectious Pathology of the Ural Federal Agrarian Scientific Research Centre of the Ural Branch of the Russian Academy of Sciences; 112a, Belinskogo st., Ekaterinburg, 620142; phone: 8-999-5652973; e-mail: vereshakna@mail.ru.
Responsible for correspondence with the editorial board: Krasnoperov Aleksandr S., Ph. D. in Veterinary Medicine, Senior Scientific Researcher of the Department of Ecology and Non-Infectious Pathology of the Ural Federal Agrarian Scientific Research Centre of the Ural Branch of the Russian Academy of Sciences; 112a, Belinskogo st., Ekaterinburg, 620142; phone: 8-903-0833132; e-mail: marafon.86@list.ru.
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