J. Anim Sci.
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J. Anim Sci. 1972. 35:139-143.
© 1972 American Society of Animal Science
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Processed Municipal Solid Waste as a Roughage and Supplemental Protein Source in Beef Cattle Finishing Diets

P. R. Utley1, O. H. Jones, Jr.2 and W. C. McCormick1

Georgia Coastal Plain Experiment Station, Tifton 31794

Abstract

A 140-day feeding trial and a replicated 3 x 3 latin square metabolism trial were conducted to determine the adequacy of Fairfield processed garbage as a roughage and supplemental protein source in beef cattle finishing diets. The three diets compared were composed of a ground shelled corn base plus one of the following: (1) 20% peanut hulls and 7.7% cottonseed meal; (2) 20% peanut hulls and 0.95% urea; or (3) 22% processed garbage. Feedlot performance and carcass characteristics means were not significantly different (P>.05). Occurrence of liver abscesses in the nine steers on each treatment was 1, 3 and 0 when fed diets 1, 2 and 3, respectively. The dry matter, crude fiber and cellulose fractions of the processed garbage diet were more digestible (P<.05) than for diets containing peanut hulls. The apparent digestibility of crude protein was similar for the processed garbage and urea diets but greater (P<.05) than for the diet containing cottonseed meal as a protein supplement. Analyses for heavy metals revealed no detectable amount of mercury in either kidney or liver tissues of steers fed processed garbage. Kidney and liver lead concentrations were about 5.6 and 4.0 ppm, respectively, compared to levels of 0.6 ppm in the tissues of control animals.

Footnotes

1 Department of Animal Science.

2 Department of Veterinary Science, Diagnostic and Research Laboratory.






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Copyright © 1972 by the American Society of Animal Science.