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Abstract
The effect of the yeast, <i>Saccharomyces cerevisiae</i>, on the fibrolytic activity in the rumen and on nutrient digestibility in the digestive tract of cows
Highlights
Interest in the use of live yeast, Saccharomyces cerevisiae, as a feed additive for ruminants has increased in recent years
Yeasts increase the number of cellulolytic bacteria as well as NDF and ADF digestion in the rumen (Newbold et al, 1995; Putman et al, 1997)
The effect of yeast on the total digestibility of nutrients depended on the marker used (Table 1)
Summary
Interest in the use of live yeast, Saccharomyces cerevisiae, as a feed additive for ruminants has increased in recent years. Yeasts increase the number of cellulolytic bacteria as well as NDF and ADF digestion in the rumen (Newbold et al, 1995; Putman et al, 1997). The increase in bacterial number probably results from improvement in the anaerobic status of rumen digesta (Newbold et al, 1996). The mechanism by which yeast cultures act on the microbial population still remains unknown, . The objective of this study was to investigate the effect of live Saccharomyces cerevisiae yeast on the activity of carboxymethylcellulase (CMC-ase) and xylanase in rumen digesta as well as on total digestive tract nutrient digestibility in cows. SACCHAROMYCES CEREVISIAE - FIBROLYTIC ACTIVITY IN RUMEN
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