The majority of the pigs in the Upper Midwest are fed a corn-soybean meal base diet. However, alternative feed ingredients are widely used in some regions. The lower performance, daily gain and efficiency of gain that is sometimes observed when other ingredients are used is often associated with higher fiber content of the diet. The pig has little ability to utilize fibrous materials in the stomach and small intestine where most digestion of feed and absorption of nutrients take place. Microorganisms present in the cecum and large intestine do break down fiber to usable products, but it is assumed that relatively small amounts of these products are absorbed. The effect that antibiotics have on fiber utilization and microbial digestion in the lower digestive tract is largely unknown.
The experiment reported herein was designed to evaluate pig performance as affected by fiber level, source of fiber and presence of antibiotics.
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Agricultural Experiment Station, South Dakota State University
Libal, G. W.; Wahlstrom, R. C.; Goehring, T. B.; and Hartman, A. D., "Effect on Antibiotics in High Fiber Diets on Performance of Growing-finishing Pigs" (1982). South Dakota Swine Field Day Proceedings and Research Reports, 1982. 9.