J. Anim Sci.
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J. Anim Sci. 1967. 26:404-410.
© 1967 American Society of Animal Science
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Utilization of Inorganic Iron by Ruminants as Influenced by Form of Iron and Iron Status of the Animal1

C. B. Ammerman, J. M. Wing, B. G. Dunavant, W. K. Robertson, J. P. Feaster and L. R. Arrington2

University of Florida, Gainesville,3

Abstract

Calves and sheep were used to determine the relative biological availability of radio-active iron administered orally in the form of ferric oxide, ferric chloride, ferrous carbonate and ferrous sulfate. In addition, calves were used to determine the influence of body iron stores on the absorption of orally administered radioactive iron. Ferrous sulfate, ferrous carbonate and ferric chloride ranked in decreasing order of availability, but were not significantly different, when evaluated on the basis of tissue Fe59 deposition. Ferrous sulfate yielded serum Fe59 levels which were significantly higher than those for carbonate, but not different from those for ferric chloride. Iron in ferric oxide was significantly less available to both calves and sheep than iron in the other compounds. In one of the three experiments, measurable levels of radioactive iron were not detected in tissues of calves receiving Fe59 ferric oxide. Tissues from iron-depleted calves receiving Fe59 ferric chloride contained three to five times as much radio-activity as corresponding tissues from non-depleted calves receiving the isotope in the same compound.

Footnotes

1 Florida Agricultural Experiment Stations Journal Series No. 2399.

2 The authors wish to acknowledge the Moorman Mfg. Co., Quincy, Ill., and the National Heart Institute (HE-01318) for funds in support of this study. M. C. Jayaswal and A. R. Williams are acknowledged for their technical assistance.

3 Departments of Animal Science. Dairy Science, Radiology and Soils.






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