EFFECT OF SACCAROMYCES CEREVISIAE SUPPLEMENTATION ON RUMEN CHARACTERISTICS IN AWASSI LAMBS FED DIETS WITH DIFFERENT ROUGHAGE TO CONCENTRATE RATIOS | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 47, Issue 7, December 2016, Pages 1-11 | ||
| Authors | ||
| S. A. Hassan; S. F. Mohammed | ||
| Abstract | ||
| Thirty two Awassi male lambs with initial body weight(27±1.78 kg), and four to five months old, were allocated into four equal groups in factorial experiment to study the effect of two roughage to concentrate rations (R:C, 60:40 and 40:60) supplemented with two levels of Saccharomyces cerevisiae (0 and 5 g S. cerevisiae / head / day) on rumen fermentations rate[Total volatile fatty acids(TVFA) ,pH and ammonia concentration (NH3-N)] . The diets were offered in quantity to achieve 150 g daily gain .Results shown no differences in daily dry matter intake(DMI) and daily gain across treatments. As well as no significant effect for R: C ratio on TVFA and pH whereas, propionic, butyric acids and NH3-N increased significantly (P<0.05) with high concentrate diets, but the molar proportion of acetic significantly (P<0.05) decreased with high levels of concentrate diets. S cerevisiae supplementation showed significantly (P<0.05) increased in TVFA, propionic and butyric acid, whereas, significantly (P<0.05) decreased acetic acid and NH3-N. Significant(P<0.05) interaction were shown between high level of concentrate and S cerevisiae supplementation in TVFA, propionic, butyric acid ,acetic acid and NH3-N whereas, no significant effect on pH .In conclusion ,S cerevisiae supplementation to high concentrate diet significantly (P<0.05) increased TVFA, propionic and butyric acid, whereas, significantly (P<0.05) decreased acetic acid and NH3-N . | ||
| Keywords | ||
| lambs; cerevisiae; Roughage to Concentrate Ratios; rumen characteristics | ||
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