Turkish Journal of Veterinary & Animal Sciences




In this study, four male Kıvırcık yearlings with permanent rumen cannula were used. The animals were fed according to a 4 x 4 Latin square design over 20-day periods (15-day adaptation period, 5-day collection period). The animals were fed four different ration types. Rations I and II consisted of a 70% alfalfa straw and 30% concentrate mixture, while Rations III and IV consisted of a 30% alfalfa straw and 70% concentrate mixture. Rations II and III were supplemented with a daily dose of 4 g of Yea-Sacc^{1026} (Alltech, Nicholasville; 5 x 10^9 CFU g^{-1}) Saccharomyces cerevisiae live yeast culture. Rumen contents were collected at 0 (before feeding), 3 and 6 h on days 1 and 5 and analyzed for pH, total protozoa counts, total volatile fatty acid (TVFA) concentration, ammonia-N (NH_3-N), rumen fluid sodium (Na^+), potassium (K^+), ruminal cellulolytic activity and percentages of different protozoa. The addition of Sc live yeast culture had significant effects (P < 0.05) on the percentage of Dasytricha ruminantium (before feeding, Ration III 0.31%, Ration IV 1.75%) and Diplodinium spp. (before feeding Ration I 4.69%, Ration II 14.62%). During the same period (before feeding) Sc live yeast culture tended to increase protozoa counts (P > 0.05). It was concluded that the rations of high forages and high concentrate supplemented with Sc live yeast culture had no significant effects on ruminal parameters except for the percentage of protozoa.


Kıvırcık yearlings, yeast culture, Saccharomyces cerevisiae, rumen metabolites, protozoa

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