Аграрная наука Agrarian science 4 2020 КОРМОПРОИЗВОДСТВО, КОРМЛЕНИЕ С/Х ЖИВОТНЫХ Пробиотическая добавка в рационах поросят-отъемышей РЕЗЮМЕ Актуальность. В последние годы уделяется большое внимание разработке новых иммуномодуляторов, пробиотиков, пребиотиков, фитобиотиков и других биологически активных препаратов.Материал, результаты. В статье приводятся результаты научнохозяйственного опыта по скармливанию молодняку свиней кормосмеси с добавкой пробиотического препарата. В результате проведения исследований установлено, что увеличение количества пробиотического препарата в кормосмеси положительно повлияло на увеличение среднесуточных приростов. Так, в третьей опытной группе, где скармливали кормосмесь с добавкой пробиотического препарата в количестве 600 г/т, среднесуточный прирост вырос на 3,5% больше, чем в контроле. Использование азота в опытных группах было выше по отношению к животным контрольной группы. Его удержано в теле в опытных группах от переваренного на 3,63% и 4,33% больше. Отложения кальция в теле молодняка свиней опытных групп было больше во второй группе -на 7,34%, в третьей -на 8,4% и фосфора соответственно на 4,05 и 13,7%.

Feeding lactating sows with the probiotic supplements “Citexflor-1” and “Sgol-1-40” at 14.4–13.1 MJ of exchange energy released from digesting 1 kg of dry matter of feed mixtures included in the diet had a positive effect on productivity, nutrient digestibility and morphological and biochemical parameters of blood. The inclusion of adequate amounts of “Citexflor-1” enhanced milk production by sows in the second trial group compared to the control by 2.03 %, in the third by 6.6 % and in the fourth by 3.9 %, with the survival in piglets observed at 89–92 %. Supplementation of probiotic preparation “Sgol-1-40” was carried out, the sows showed to produce more milk by 5.8 % in the second trial group, 16.3 % in the third, and 20.7 % in the fourth group compared to the control. In the study of morphological and biochemical parameters of blood in sows in the first experiment, the erythrocyte number was greater in the third trial group by 6.2 %, and in the fourth by 4.7 %. In the second experiment, with probiotic supplementation of “Sgol-1-40” fed to sows, the number of red blood cells was 4.2; 18.1 and 32.1 % greater, respectively, along with hemoglobin level higher at 2.8; 15.3; 24.1 %, respectively.

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The article provides experimental data on the study of application of two probiotic additives - “Sitexflor - 1” and “SGOL-1-40”, included at different dosages in the diets for young pigs, on usage of the supplied nitrogen and their productivity. Such parameters were taken into account when forming the groups as: weaning time (60 and 45 days), preliminary feeding the mothers with the probiotic supplements under study during the suckling period. The results, characterizing the piglet productivity in case of application of “Sitexflor - 1”, convince that the most effective dose is 30 mg per head per day, which provided an average daily gain of 351 g, which is 7.3% more than the control, primarily due to greater nitrogen retention in the body (by 9.91%), but with lower consumption of energy feed units per 1 kg of gain -4.43 (by 11.4%). The results, characterizing the piglet productivity when applying “SGOL -1-40”, reliably confirm its most effective dosage of 2.5% of the dry matter of the diet, which provided an average daily gain of 404 g, which is 15% more than the control, due to greater nitrogen retention in their body (by 4%). Introduction of “SGOL -1-40” in the diet provided a significant reduction in the cost of energy feed units per 1 kg of gain in comparison with the control by 14.3%. The nitrogen balance in the body of young pigs was positive in both experiments, but the amount of nitrogen retained in the body was different. At the same time, even a greater amount of deposited nitrogen in animals in the first experiment did not allow to achieve the expected live weight increase, and in the second experiment, on the contrary, even surpassed it. Such data indicate that the supplied nitrogen with a diet enriched with a probiotic supplement was more effectively used in the body, exceeding the physiological level of its transformation into products.