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The Requirements of Phosphorus in the Ration of Growing Pigs¹

Kansas Agricultural Experiment Station

Abstract

The rôle of phosphorus in animal nutrition has received much attention by workers in the field of nutrition since the discovery that aphosphororis occurs quite frequently under ordinary feeding conditions in different localities throughout the world. As a result of this attention many studies have been made, most of which have dealt with the need of phosphorus in the rations of animals and how the deficiencies could be corrected. Eckles and ascociates (1 and 2), Theiler and associates (5 and 6), and Malan, Green and Du Toit (3). Other studies have been concerned with the calcium-phosphorus ratio and with the specific effects of phosphorus-deficient rations on digestion and metabolism. Eckles, Becker and Palmer (1) and Riddell, Hughes and Fitch (4).

Despite this activity in research our conception of the amounts of phosphorus necessary for the well doing of swine is on an unsatisfactory basis.

It is the purpose of this paper to provide some indication of the minimum requirements of phosphorus for swine in order to insure normal bone formation and at the same time allow for an adequate rate of growth and development.

¹ This paper represents a portion of a thesis presented by C. E. Aubel in partial fulfillment of the requirements for the Ph. D. degree, University of Minnesota, 1935.