J. Anim Sci.
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J. Anim Sci. 1954. 13:630-637.
© 1954 American Society of Animal Science
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Observations on the Use of Waste Beef Fat in Swine Rations1

D. H. Kropf2, A. M. Pearson and H. D. Wallace3

Florida Agricultural Experiment Station,4

Abstract

Four experiments involving a total of 73 pigs were conducted to determine the feeding value of raw ground waste beef fat in swine rations. Levels of 10 and IS percent fat were fed successfully in the mixed ration, with the replacement value of the fat averaging 115 percent of corn. Added fat increased the efficiency of gains in all experiments. However, there was no consistent increase in average daily gains.

Neither added fat nor B-vitamins showed any clear-cut effect upon dressing percentage, backfat thickness, carcass grades or firmness as measured by Iodine Numbers and manual firmness grades. When the fat was hand fed and the remainder of the ration self fed, the pigs ate 18 percent fat. However, gains were unsatisfactory and the dressing percentage was lower. The carcasses from the pigs which were hand fed fat also had less backfat, more length, and were less firm than those from pigs fed on the other rations.

Footnotes

1 Florida Agricultural Experiment Station Journal Series No. 186.

2 Present address: Department of Animal Husbandry, University of Wisconsin, Madison, Wisconsin.

3 Grateful acknowledgement is made to Winn and Lovett's Food Stores Foundation of Jacksonville, Florida for financial aid and for supplying the raw ground beef fat used in this experiment. The authors are also indebted to Merck & Co., Rahway, N. J., for supplying the B-vitamins.

4 Department of Animal Husbandry and Nutrition.






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Copyright © 1954 by the American Society of Animal Science.