Effect of yeast culture supplement on ruminal microbial populations and metabolism in buffalo calves fed a high roughage diet

acetic acid acide gras acide propionique acido acetico acido propionico additif aux aliments des animaux aditivos de piensos ammonia ammoniac azote buffle domestique diet dieta dietary fibres digestion du rumen domestic buffaloes fatty acids feed additives fibra de la dieta fibre alimentaire fluide du rumen fluido del rumen forraje grosero fourrage grossier jeune animal levadura levure metabolism metabolisme metabolismo microorganismos del rumen nitrogen ph propionic acid roughage rumen rumen digestion rumen fermentation rumen fluid rumen microorganisms saccharomyces cerevisiae suplementos supplements yeasts young animals