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Definition of the Ovine Potassium Requirement¹

University of Missouri, Columbia

Abstract

A trial to define the ovine potassium requirement was conducted using 48 group fed lambs. The levels of K studied ranged from 0.1 to 0.62% of the complete ration.

It has been shown that the minimum K level for the growing-finishing lamb is near 0.30% K of the ration (0.34% of D.M.) and that the optimum level is 0.5% K of the ration (0.55% of D.M.). It has also been shown that the maintenance requirement for K in lambs is close to 65 mg. K/kg. body weight per day and that plasma-K below 12 mg./1OO ml. may indicate an inadequate intake of K. This may be further confirmed by hematocrit determinations and amount of K present on the surface of the skin.

¹ Contribution from the Missouri Agricultural Experiment Station. Journal Series Number 2613. Approved by the Director.

² Department of Animal Husbandry.

³ Department of Veterinary Pathology.