short-term effect (growth). Based on projections from large- scale calf/heifer observations, such improvements can be extrapolated into long-term benefits, too.
How does it work? S. cerevisiae CNCM I-1077 is a well documented active dry yeast strain for ruminant feeding. Hundreds of scientific pub- lications, including many peer-reviewed papers, describe its modes of action. Three major mechanisms can help explain the benefits observed in calves: 1) Enhanced rumen maturation. An accelerated rate of estab- lishment of cellulolytic bacteria and ciliate protozoa, both of which are essential for fibre degradation, has been shown; and rumen wall papillae development is also improved. 2) Optimized rumen pH. One of the key effects of S. cerevisiae CNCM I-1077 is to stabilise the pH in the rumen. This has been shown extensively in both dairy and beef cattle as well as in weaning calves. 3) Improved fibrolytic potential. Both fibrolytic microbial pop- ulations and the activity of fibrolytic enzymes are improved.
Conclusions Young calves are like rough diamonds: to fully express their performance potential, perfect preparation is key. During the first months of life and around weaning, their digestive system develops, and many challenges can alter this devel- opment − potentially with long-term consequences. The ru- men microbiota balance, which is important to ensuring op- timal performance and welfare, is closely linked to calf
management. There is a strong body of evidence that docu- ments the modes of action of the S. cerevisiae CNCM I-1077 live yeast strain in the rumen, in particular its ability to sup- port rumen maturation and function in young animals. Com- mercial and research trials confirm the benefits of live yeast supplementation in a calf’s diet, from birth to weaning: more starter intake, improved growth rate and homogeneity, re- sulting in earlier weaning and a significant ROI for the pro- ducer. The calf rumen is better prepared and thus ensures optimal dairy performance later in life.
weight 37.1 kg, USA 2009).
40.5 40
39.5 39
38.8b
38.5 38
Control a,b: p<0.15 ▶ ALL ABOUT FEED | Volume 28, No. 9, 2020 31 LEVUCELL SC 40.3a
It’s been shown that live yeast supplementa- tion improves rumen wall papillae development.
Days to weaning (days)
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