Effect of yeast on rumen microorganisms

Yeast preparations are commonly used as rumen regulators, but their mechanism of action is not yet clear. Based on our previous studies, we questioned whether yeast cultures (YC) would have an impact on rumen solid-associated (SA) and liquid-associated (LA) microorganisms and alter rumen fermentation. Addition of YC to high concentrate diets can change the abundance of major functional microbiota in rumen, especially in the solid fraction, which in turn affects rumen fermentation patterns and improves rumen digestibility.