ISSN 1607-2774
Вестник Государственного университета имени Шакарима города Семей № 4(92) 2020
313
in finding ways to normalize the intestinal microflora using prebiotics, which contribute to improving animal
health by selectively stimulating the growth or metabolic activity of one or more groups of bacteria.
The study of the effect of feed additives on the digestibility of feed at different times of the study
showed that 15 days after the start of the experiment, there is a visible effect on the digestibility of feed,
which is significantly enhanced after 30 days, when the protein assimilation in calves of the third
experimental group increases by 5.0 %, fat 7.7 and fiber 11.5%. Calves of the experimental groups had high
growth energy, which was reflected in the absolute indicators of growth and their development. The
digestibility of nutrients under the influence of pre-and probiotic drugs affects the weight gain in calves that
received them separately and in a mixture, i.e. feeding the drugs after 15 days showed a positive effect on
the increase in live weight of calves, and a greater weight gain was observed in calves that took a mixture of
Vetelact and Vitafort.
Key words: probiotic preparations, probiotic preparations, feed digestibility, intestinal microflora,
weight gain.
ISSN 1607-2774
Семей қаласының Шәкәрім атындағы мемлекеттік университетінің хабаршысы № 4(92)2020
314
ТАРИХ ҒЫЛЫМДАРЫ
ИСТОРИЧЕСКИЕ НАУКИ
МРНТИ: 03.09.55
А.А. Аскербек, А.М. Есдаулетова
Евразийский национальный университет им. Л.Н.
Гумилева, г. Нур-Султан
ГЕОПОЛИТИЧЕСКОЕ СОПЕРНИЧЕСТВО США И РОССИИ
НА ПОСТСОВЕТСКОМ ПРОСТРАНСТВЕ
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