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Injectable Iron for Beef Cattle^{1, 2,}

Purdue University, Lafayette, Indiana

Abstract

Two experiments were conducted with suckling calves and two experiments with fattening beef calves and yearlings to determine the effect of injectable iron. In one calf trial hemoglobin and packed cell volume values were compared.

An injection of 500 mg. of iron in calves less than 48 hr. of age was without benefit, as measured in terms of effect on gain to weaning.

Suckling calves averaging 4 months of age at time of injection of 1 gm. iron gained slightly more rapidly than controls which received no iron during a 91-day trial.

Two injections of 500 mg. of iron, one initially and the other 119 days later, were without significant effect on gain of fattening calves in a 208-day drylot trial.

Two injections of 1 gm. of iron, one initially and the other 14 days later, resulted in a significant (P<.05) depression in gain of fattening steer calves and of fattening yearling steers.

The effect of iron injections on feed consumption and efficiency of feed conversion could not be determined, because treatments were administered within feeding groups.

¹ Department of Animal Sciences Journal Paper No. 2694, Purdue University Agricultural Experiment Station, Lafayette, Indiana.

² The Armidexan was supplied by Armour and Company; Pigdex 100 was supplied by American Cyanamid Co. The research was supported in part by a grant-in-aid from the Armour Pharmaceutical Laboratories, Kankakee, 111.

³ Southern Indiana Forage Farm.

⁴ Department of Agronomy.

⁵ Lynnwood Farm, Carmel, Indiana.