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. 1977 Mar 1;18(1):98–107. doi: 10.1186/BF03548470

Fermentation Pattern in the Bovine Rumen after Feeding Straight Feeds

Kurt Jensen 1,✉
PMCID: PMC8377693  PMID: 15431

Abstract

The influence of straight feeds on the fermentation pattern in the bovine rumen was investigated by feeding with hay, grass pellets, dried beet pulp with molasses and rolled oats. The study comprised 3 rumenfistulated dairy heifers, and the parameters measured were ammonia, pH and volatile fatty acids (VFA) in the rumen fluid, and non-glucogenic/glucogenic ratio (NGGR) in the VFA mixture.

Typical differences related to the structure and chemical composition of the diets were demonstrated by the parameters measured. Fermentation of the easily digestible feeds resulted in so extensive variations that representative means could be obtained only by analyzing samples collected frequently throughout the feeding cycle.

Rumen pH was found highly correlated to total VFA concentration for all the feeds examined, and the regression coefficients showed that diets, based upon beets and oats, were fermented under low buffering capacity.

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Acknowledgments

The author wishes to express his great appreciation to P. Havskov S0rensen, Professor, Dr. agro., for valuable discussions, and to Lise Lotte Berring and Gerda Larsen for their skilful technical assistance.

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