J. Anim Sci.
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J. Anim Sci. 1988. 66:1325-1334.
© 1988 American Society of Animal Science
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Effect of Supplemental Potassium in the Receiving Diet and Form of Antibiotic on Feeder Pig Performance1,2,3,

G. W. Jesse4, J. R. Walker4, C. N. Weiss4 and H. F. Mayes5

University of Missouri, Columbia 65211

Abstract

In five separate trials 901 feeder pigs (769 purchased and 132 university-raised) were used to determine the effect of level of dietary K (.64 vs 1.00 vs 1.40%), form of neoterramycin (feed-grade vs water-soluble) and a long-lasting oxytetracycline injection on subsequent performance. Purchased pigs fed a 28-d receiving diet with 1.00% K gained faster (P < .05) than the control pigs fed a .64% K diet (.64 vs .60 kg) during a 1980 summer trial. Feed efficiency was not affected by level of dietary K. Three additional trials conducted during January, July and October of 1981 failed to substantiate this beneficial effect on rate of gain. Feeder pig performance was not different (P > .05) when either feed-grade or water-soluble neoterramycin was used as a 14-d receiving treatment at preventative levels. However, in one trial nearly twice as many pigs on the medicated feed diet required additional treatment for sickness compared with pigs receiving water medication (14.5 vs 7.9%; P < .1). Giving pigs an injection of a long-lasting oxytetracycline (LA-200) either at the market or upon arrival at the finishing facility had no effect on performance; however, the pigs were home-raised rather than purchased; consequently, their health was excellent.

Footnotes

1 Contribution from the Missouri Agric. Exp. Sta., journal series no. 10420. Approved by the director.

2 Partial financial support was provided by the Natl. Pork Prod. Council, the Missouri Pork Prod. Assoc. and Pfizer Agric. Div., Lee's Summit, MO.

3 The authros express thanks to Dr. M. R. Ellersieck, Agric. Exp. Sta. Statistician, for assistance with the statistical analysis.

4 Anim. Sci. Dept.

5 Agric. Eng., USDA-ARS, Bioeng. Res. Unit.






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Copyright © 1988 by the American Society of Animal Science.