Much of the research with feedlot cattle has been devoted to studies of ways to improve feed utilization. A large portion of feed energy, and also protein, available to the ruminant results from microbial fermentation in the rumen, or rumen-reticulum. Environmental conditions maintained in the rumen are important in the rate of fermentation and the resulting end-products. Numerous experiments have shown that volatile fatty acids (VFA)--major ones being acetic, propionic and butyric produced by microbial fermentation in the rumen play major roles in energy metabolism of ruminants.
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Department of Animal Science, Agricultural Experiment Station, South Dakota State University
Embry, L. B., "Rumesin for Growing and Finishing Cattle" (1976). South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1976. 13.