N. M. Naumov, G. A. Svazlyan
Federal Agrarian Kursk Research Center, st. K. Marksa, 70b, Kursk, 305021, Russian Federation
Abstract. The purpose of the research was to study the effect of the Bacillus subtilis probiotic suspension (PS) developed at the Kursk Federal Agricultural Research Center on the metabolism of early-weaned piglets (up to 60 days old) during the rearing period. The suspension was grown on a nutrient medium from sprouted huskless oat Nemchinovskiy-61. The PS included a live culture of B. subtilis in an amount of at least 1 x 10E7 CFU/mL, metabolites and components of the nutrient medium. Among amino acids leucine and isoleucine (15.49 mg/L), proline (19.97 mg/L), and alanine (20.49 mg/L) prevailed; carboxylic acids are represented by succinic (29.6 mg/L), acetic (61.1 mg/L), and lactic (75.4 mg/L) acids. The experiment was conducted under production conditions in the Kursk region on hybrid pigs (Duroc x Large White). Two groups of animals, 10 animals each, were formed according to the pair-analogue principle. The animals from the second group, in addition to the main diet, received PS every day in the amount of 10 mL/kg of live weight through the dosed watering system. The use of the probiotic suspension activated nonspecific immunity, which was confirmed by the higher number of T-helper cells (by 10.42%) and B-lymphocytes (by 18.82%) in the blood of piglets during the rearing period, and increased live weight by 6.39%, and the average daily weight gain by 6.80%. This was due, among other things, to the activation of protein metabolism and more efficient assimilation of feed nitrogen, as indicated by an increase in the level of total protein in the blood of animals from the experimental group, in comparison with the control group, by 9.73% and an increase of creatinine by 3% against the background of a decrease in the urea amount by 16.82%.
Keywords: B. subtilis; probiotic; metabolites; metabolism; metabiotics; piglets; productivity; probiotic suspension.
Author Details: N. M. Naumov, Cand. Sc. (Biol.), senior research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); G. A. Swazlyan, Cand. Sc. (Biol.), senior research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.).
For citation: Naumov NM, Svazlyan GA. [Effect of Bacillus subtilis and its metabolites on the metabolism of piglets during the rearing period]. Dostizheniya nauki i tekhniki APK. 2021;35(6):63-7. Russian. doi: 10.24411/0235-2451-2021-10611.