UDC 636.2.087.8
DOI 10.36461/NP.2025.75.3.004

CORRECTION OF KEY PARAMETERS OF RUMINAL DIGESTA IN HIGH-YIELDING COWS USING BUFFER ADDITIVES WITH PROBIOTIC YEAST
D. M. Fertikova, Postgraduate; E.M. Kislyakova, Doctor of Agricultural Sciences, Professor
Federal State Budgetary Educational Institution of Higher Education "Udmurt State Agricultural University",
Izhevsk, the Udmurt Republic, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Today, high milk productivity in cows can be achieved only by using large amounts of concentrated feed in their diets. The peak milking period is the most physiologically stressful time for the animals. The purpose of the study is to compare the effectiveness of using Saccharomycetes and Kluyveromyces yeast in buffer additives for cows. The research was conducted at "Voskhod" AO in the Sharkan district of the Udmurt Republic on Holstein cows. For the study, animals were selected into groups using the pair-analog method. During the study period, the organoleptic parameters of ruminal digesta indicated signs of subclinical ruminal acidosis in the cows. After 30 days of using buffer additives with probiotic yeast in the cows' diets, a positive outcome was observed: in the experimental groups, the consistency of the ruminal digesta was slightly viscous, and no animals had watery consistency. In the control group, the number of cows with watery consistency remained unchanged. A positive trend was also observed in terms of smell. The effectiveness of using buffer additives with probiotic yeast in cow diets as a preventive measure against ruminal acidosis is further confirmed by changes in the background indicators of ruminal digesta: stabilization of ruminal fluid acidity and an increase in the number of ciliates with preservation of their functional activity were observed. The best effect was achieved when a buffer additive with Kluyveromyces marxianus yeast was used. A significant (P ≥ 0.95) increase in the number of ciliates in the ruminal fluid was observed, by 199,000 per 1 ml, or 20.9%.
Keywords: ruminal digesta, acidosis, buffer additives, probiotics, yeast, prevention.

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