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Performance of lambs and steers given monensin with different levels of barley†

Published online by Cambridge University Press:  02 September 2010

G. M. J. Horton ,
E. H. Keeler  and
K. A. Bassendowski
G. M. J. Horton
Affiliation:
Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Canada
E. H. Keeler
Affiliation:
Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Canada
K. A. Bassendowski
Affiliation:
Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Canada
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Abstract

The effect of barley level and monensin on feedlot performance by lambs and steers was investigated in two experiments. Monensin was given at 0 and 33mg/kg of food in lamb and steer diets, which contained bailey at levels from 300 to 900g/kg. Food consumption by lambs was not affected by monensin but intakes decreased with increasing levels of barley (P < 0·05). Food intake by steers decreased in a linear manner with increasing levels of barley (P < 0·01) and averaged 80g/kg lower when monensin was fed (P < 0·05). Monensin improved lamb gains by 350g/kg (P < 0·001), but had no effect on steer performance. Feeding monensin improved average food efficiency in lambs and steers by 27 and 4%, respectively. Carcass characteristics were not influenced by monensin, but heavier carcasses (P < 0·01) in steers given the high barley rations were also fatter (P < 0·001).

Type
Research Article
Information
Animal Production , Volume 32 , Issue 3 , June 1981 , pp. 267 - 274
Copyright
Copyright © British Society of Animal Science 1981

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References

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