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Intake and Digestibility by Sheep of Rations Containing Various Roughage Substitutes^1,2,

The Pennsylvania State University, University Park^,4

Abstract

Several potential roughage substitutes were fed to sheep at a rate of 10% of the complete ration to determine the acceptability and digestibility of rations containing these products. Materials evaluated include: Wood products (sawdust, shavings, flooring waste), verxites, kaolin clays and sugar cane bagasse with ground corn cobs serving as the control. Dry matter intakes of the rations containing wood by-products, clay or verxite were not significantly different from that of the control ration with ground corn cobs as the roughage source. A variety of roughage substitutes can be incorporated into complete feeds without adversely affecting digestible energy intake; however, bagasse as the roughage source tended to reduce intake. The presence of the substitutes tended to increase the digestibility of the concentrate fraction of the rations.

¹ Authorized for publication May 8, 1969, as Paper No. 3598 in the Journal Series of the Pennsylvania Agricultural Experiment Station.

² This research was supported in part by grants from the Tennessee Valley Authority, Division of Forestry Development, Norris; Agway, Inc., Syracuse, N. Y.; and from PHS Grant AM 12023.

³ The authors gratefully acknowledge the technical assistance of Mr. J. A. Weaver.

⁴ Department of Animal Science.