J. Anim Sci.
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J. Anim Sci. 1960. 19:38-43.
© 1960 American Society of Animal Science
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Arsanilic Acid in Growing-Fattening Rations of Identical Twin Calves1

D. E. Hodge, M. P. Plumlee and W. M. Beeson

Purdue University Agricultural Experiment Station2, Lafayette, Indiana

Abstract

Four sets of identical twin beef calves were fed for a period of 146 days on a growing-fattening ration to determine the effect of different levels of dietary arsanilic acid on performance. One twin of each set was fed either 50, 150, 250 or 350 mg. of arsanilic acid daily.

Growth rate was not affected by the daily feeding of 50 or 150 mg. of arsanilic acid but was reduced at the 250 and 350 mg. levels 0.16 and 0.33 lb. daily, respectively. Appetite was reduced slightly by the 150, 250 and 350 mg. levels and increased a similar amount by the 50 mg. level. The most significant change in feed efficiency was the decrease resulting from feeding 350 mg. of arsanilic acid. Transit shrink was reduced by all four levels of arsanilic acid. The carcass grades were one-third of a grade higher for the calves fed 50, 150 and 250 mg. of arsanilic acid over their twin controls, but one grade lower for the twin fed 350 mg.

The liver, kidney and rumen wall contained the greatest amounts of arsenic, and the amount increased with the dietary increases of arsanilic acid up to 250 mg per day.

Footnotes

1 The authors are grateful to Abbott Laboratories, North Chicago, Illinois, for furnishing the arsanilic acid used in this study and to L. B. Overby (Abbott Laboratories) who made the tissue arsenic analyses reported herein.

2 Contribution from the Department of Animal Science, Journal Paper No. 1369.






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Copyright © 1960 by the American Society of Animal Science.