J. Anim Sci.
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J. Anim Sci. 1978. 47:788-790.
© 1978 American Society of Animal Science
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Optimum Level of Monensin for Fattening Lambs1

C. F. Nockels2, D. W. Jackson2 and B. W. Berry3

Colorado State University, Fort Collins 80523

Abstract

One-hundred-twenty white-face wether lambs were allotted to one of five treatment groups with two replicate pens of 12 lambs each. Lambs were fed a standard fattening ration to which 0, 5.5, 11, 22, or 33 ppm monensin had been added.

Over the 70-day feeding trial, lambs fed 5.5 and 11 ppm monensin had improved (P<.05) gains as compared to those fed 0, 22 and 33 ppm monensin. Overall feed efficiency for the monensin groups was 9% higher than in controls, although the difference was not significant. Carcass characterisitcs were not significantly altered (P>.05) by feeding monensin at any level.

Footnotes

1 This investigation was supported in part by Elanco Division, Eli Lilly and Co., Indianapolis, IN 46206.

2 Department of Animal Sciences.

3 Present address: Meat Science Research Laboratory, ARS, USDA, Beltsville, MD 20705.






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Copyright © 1978 by the American Society of Animal Science.