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Cellulose and Hemicellulose Digestibility in the Stomach, Small Intestine and Large Intestine of Swine^{1, 2, 3,}

University of Maryland, College Park 20742

Abstract

Alfalfa, grain sorghum, Texas Kleingrass and Coastal Bermuda grass hays were fed to swine as part of four diets each containing 30% cell walls. The swine were fitted with duodenal and ileal cannulas and digestion coefficients for dry matter, cell walls, cellulose and hemicellulose were determined from duodenal, ileal and fecal samples.

Total dry matter digestion ranged from 66 to 75% and approximately 58% of that was in the small intestine with the remainder occuring in the large intestine. Except for the Coastal Bermuda grass diet approximately 100% of the cellulose and 80% of the hemicellulose digestion occurred in the large intestine. Most of the Coastal Bermuda grass cell-wall, cellulose and hemicellulose digestion appears to have occurred in the small intestine; however, because the intake of this diet was low, the high digestibility coefficients were questionable.

¹ Scientific Article No. A1923, Contribution No. 4845 of the Maryland Agr. Exp. Station, Project C-46, Department of Animal Science.

² The authors wish to express their appreciation to Dr. Marvin E. Riewe of Texas A and M University for supplying the Texas Kleingrass and the Coastal Bermuda grass used in this experiment and to Dr. Allen L. Ingling, University of Maryland, Department of Veterinary Science, for surgical assistance.

³ Data taken from a thesis submitted by the senior author in partial fulfillment of the requirements for a Ph.D. degree.