PT - JOURNAL ARTICLE AU - Doležal, Petr AU - Dvořáček, Jan AU - Dvořáčková, Jitka AU - Poštulka, Roman AU - Doležal, Jan AU - Szwedziak, Katarzyna TI - The use of yeast culture in feeding of dairy cows DP - 2014 Aug 6 TA - Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis PG - 75--82 VI - 58 IP - 5 AID - 10.11118/actaun201058050075 IS - 12118516 AB - The aim of this study was to determine the effect of a yeast culture (Saccharomyces cerevisiae CNCM I - 1077) addition in the diet of dairy cows on their rumen fermentation. Animals received a diet consisting of good maize silage with a higher dry matter content (18 kg), 6 kg of lucerne haylage, 5 kg of pea - silage, 3 kg of ensiled high moisture crimped corn, 1 kg of meadow hay, rape-cake 1 kg, brewer's grain silage 4 kg, and 8.0 kg feed mixture. The yeast culture was added to the mixture in the dose 2.8*10<sup>10</sup> cfu/day and cow. The supplement of yeast culture showed a positive effect on ruminal VFA production by experimental group cows in comparison with control, higher production (P &lt; 0.01) of acetic acid (58.50 ± 1.2583<sup>b</sup> vs. 51.833 ± 2.409<sup>a</sup> %), and lower production of propionic and butyric acid (24.667 ± 1.3744<sup>a</sup> vs. 28.833 ± 1.863<sup>b</sup> %). The average utilisation of ammonia was higher by cows in treated group (12.267 ± 0.754 mmol/L), but difference was not significant. The difference in number of protozoa of cows in the control and experimental groups was significant (P &lt; 0.05) different (308.333 ± 24.390<sup>a</sup> vs. 342.333 ± 10.9341<sup>b</sup> ths /1 ml of rumen fluid).