The research is devoted to the study of the influence of the modern antioxidant of the flavonoid group ‘Dihydroquercetin’ as part of the feed combination on the hematological profile and biochemical parameters of the blood of broiler chickens of the KOBB-500 cross. The content of hemoglobin and erythrocytes in the blood of broilers receiving dihydroquercetin increased, which indicates an increase in the intensity of redox processes in the body. The number of leukocytes in all groups was normal, but in the experimental groups their decrease was noted, which indicates the therapeutic and immunostimulating effect of the drug. Evaluation of protein metabolism by the content of total protein and the fraction of albumin in the blood serum showed its positive dynamics within the normal physiological values, which characterizes an increase in the intensity of assimilation processes in the bird’s body. The metabolism of carbohydrates was assessed by the content of glucose in it, and a decrease in its level indicates its increased consumption as an energy component for metabolic processes associated with intensive growth of chickens. An increase in the activity of alkaline phosphatase by 1.3-1.8 times is associated with the active growth of chickens.

The article presents the results of studies of the effectiveness of the use of the complex probiotic preparation Immunoflor in young hens of egg cross. In the course of the research work, it was found that the use of the probiotic preparation Immunoflor does not affect the clinical and physiological state of the body of young chickens, but at the same time reduces the incidence, mortality and increases the safety of the chickens by enriching and balancing the poultry diet, reducing the conversion feed, optimization of digestion, stimulation of the development of positive microflora in the gastrointestinal tract. The use of the complex probiotic preparation Immunoflor in the diet of young chickens at a dose of 15 g/t of water and 15 g/t of feed contributes to an increase in the number of erythrocytes, leukocytes and hemoglobin concentration, activation of cellular and humoral factors of nonspecific resistance of the body of chickens, providing a normal physiological state and homeostasis.

Research is devoted to the study of the feasibility of using a natural antioxidant of plant origin as a biologically active additive to the basic diet and assessing the effectiveness of its use to increase the meat productivity of broiler chickens. In our work we examined the broiler chickens productivity and quality when using the drug ‘Dihydroquercetin’ (LLC’Kakhor’, Zima, Irkutsk region, Russia) in diets and established the amount of feed consumed and its costs per unit of production. Based on the studies, the addition of the preparation enables to increase the safety of broiler chickens by 20…30%, live mass - by 12…33%, mass of ripped carcass - by 15…38%, muscle tissue - by 3%, thoracic muscles - by 0.3…2%, and edible parts of carcass -by 2…6%. Moreover, the additive reduces the feed consumption by a head during the fattening period by an average of 46.09 g compared to the control.

This paper highlights the study results on the usage effectiveness of the domestic complex probiotic preparation Immunoflor developed by PC KROS Farm LLC on Dekalb White egg cross chickens in the production of edible eggs. The work was carried out in the conditions of the agricultural production cooperative "Gornomariyskaya Poultry Farm" of the Republic of Mari El. During the experiment, it was found that eggs from laying hens with the highest weight and more close to the ideal shape were obtained in the 1st and 2nd experimental groups. Indicators of weight, elastic shell strain, albumen index were higher in the experimental groups relative to the control. By the end of the productive period, the yolk index was higher in the 1st and 2nd experimental groups than in the control by 0.12 and 0.7%, respectively. An increase in the albumen height and the indicator of Haugh units was noted in the eggs of the 1st and 2nd experimental groups relative to the control. It was found that egg mass loss decreased when they were stored for 14 days. Thus, the weight of eggs increased and their morphological indicators improved against the background of using a complex probiotic preparation in young poultry.

Проведено научное исследование с целью реализации продуктивных качеств яйценоской породы кур кросса Декалб Уайт. Нами использован отечественный комплексный пробиотический препарат Иммунофлор, разработанный ООО «ПК КРОС Фарм». На фоне применения указанного препарата установлено, что среднесуточный показатель яйценоскости в 1-й и 2-й опытных группах превосходил таковой в контроле: на 150-е сутки – на 9,66 и 8,48 %, на 180-е сутки – 8,8 и 5,04 %, на 210-е сутки – 8,16 и 6,44 %, на 240-е сутки –11,68 и 3,8 %, на 270-е сутки – 7,72 и 4,84 %, на 300-е сутки – на 8,34 и 5,86 % соответственно. Кроме этого, средний показатель массы яиц в 1-й и 2-й опытных группах оказался выше, нежели в контроле: на 1-е сутки хранения – на 7,38 и 5,77 %; на 7-е сутки – на 7,53 и 5,87 %; на 14-е сутки – на 8,18 и 6,12 % соответственно. Установлено, что в контрольных образцах воздушная камера была меньше на 0,1 мм, чем в образцах опытных групп. Масса белка яиц контрольной группы была меньше на 7,12 и 4,88 %, чем в первой и второй опытных группах соответственно. Масса желтка в контроле была ниже, чем в первой и второй опытных группах на 9,96 и 9,12 % соответственно. Показатели массы скорлупы в первой и второй опытных группах были выше, чем в контрольной группе, на 0,94 и 1,70 % соответственно. Установлено, что на 7-е сутки хранения потеря в массе яиц в 1-й и 2-й опытных группах составила 1,50 и 1,56 % соответственно, что ниже, чем в контроле. На 14-е сутки хранения потеря в массе яиц в 1-й и 2-й опытных группах составила 1,95 и 2,36 %, что также оказалась ниже, нежели в контрольной группе. Следует отметить, что наиболее выраженный соответствующий эффект получен на фоне введения препарата в рацион суточных цыплят с водой. A scientifi c study was conducted in order to realize the productive qualities of the egg-bearing breed of Dekalb White cross hens. We used the domestic complex probiotic preparation of Immunofl or, developed by PK CROS Pharm LLC. Against the background of the use of this drug, it was found that the average daily rate of egg production in the 1 and 2 experimental groups exceeded that in the control: on the 150 day-9.66 and 8.48 %, on the 180 day-8.8 and 5.04%, on the 210 day – 8.16 and 6.44 %, on the 240 day -11.68 and 3.8 %, on the 270 day – 7.72 and 4.84 %, on the 300 day – 8.34 and 5.86 %, respectively. In addition, the average weight of eggs 1 and 2 experimental groups were higher than control at 1 day of storage – by 7.38 and 5,77 %; on day 7 – 7.53 and of 5.87 %; for 14 days – 8.18 and 6.12 %, respectively. It was found that in the control samples, the air chamber was smaller by 0.1 mm than in the samples of the experimental groups. The protein mass of the eggs of the control group was less by 7.12 and 4.88 % than in the fi rst and second experimental groups, respectively. The yolk mass in the control was lower than in the fi rst and second experimental groups by 9.96 and 9.12 %, respectively. The shell mass indicators in the fi rst and second experimental groups were higher than in the control group, by 0.94 and 1.70 %, respectively. It was found that on the 7th day of storage, the loss in egg mass in the 1 and 2 experimental groups was 1.50 and 1.56 %, respectively, which is lower than in the control group. On the 14th day of storage, the loss in egg mass in the 1 and 2 experimental groups was 1.95 and 2.36 %, which was also lower than in the control group. It should be noted that the most pronounced corresponding effect was obtained against the background of the introduction of the drug into the diet of daily chickens with water.