تاثير مخمر زنده (ساكارومايسز سرويسيه ) بر تخميرات شكمبه و متابوليتهاي خون گوسفند

The effect of live yeast (Saccharomyces cerevisiae-1026) on rumen fermentation parameteres and blood metabolites of sheep

Four rumen fistulated Balouchi sheep aged six month with a mean live weight of 35 kg were used in a split split plot change-over design to examine effects of Live yeast (Saccharomyces cerevisiae-1026) supplement on rumen fermentation and blood metabolites. Diets were balanced according to 1.25 times maintenance requirements based on ARC (1995) recommendations. The treatments were H) High fiber diet (% 30 concentrate+ % 70 hay), HY) High fiber diet plus 4 g of yeast per head per day, C) High concentrate diet (% 70 concentrate+ % 30 hay), CY) High concentrate diet plus 4 g of yeast per head per day. During 6 and 8 hours after feeding, blood and rumen liquid samples were collected, respectively and to predict microbial protein, urinary samples were taken at the end of the study, for three days. Yeast increased significantly rumen pH, two hours after feeding CY, (6.22 vs. 6.05). Rumen NH3 concentration significantly decreased from 1 to 4 hours and from 0.5 to 3 hours after feeding HY and CY, respectively. Yeast decreased plasma urea concentration significantly three hours after feeding HY and two hours after feeding CY (10.72 vs. 13.76 and 10.69 vs. 13.74 mg/dl, respectively). Microbial protein mean was higher relatively by HY than other treatments. Results indicated that, yeast increasing feed efficiency by increase use of ammonia and increases microbial protein product.