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A Comparison of Different Phosphate Supplements for Hogs and Rats¹

Purdue University Agricultural Experiment Station^,4

Abstract

Conclusions:

1. In rations for growing pigs steamed bone meal was superior to either defluorinated phosphate or rock phosphate as a mineral supplement. Super-phosphate compared favorably with steamed bone meal. The results were usually not related to the fluorine content of the ration.
   
2. In rations for bred sows and gilts steamed bone meal was only slightly superior to defluorinated phosphate and rock phosphate.
   
3. In studies with rats calcium and phosphorus retention was influenced by the fluorine content of the ration and the form of phosphorus in the mineral. Growth was affected more by the form of phosphorus than by the fluorine content of the ration. The various minerals studied had similar effects on reproduction.
   

¹ Journal Paper No. 206 Purdue University Agricultural Experiment Station.

² Present address, Midwest Research Institute, Kansas City, Kansas.

³ The assistance of Messrs. J. G. Cobbler and P. R. Godfrey in making some of the chemical analyses is acknowledged.

⁴ Departments of Agricultural Chemistry and Animal Husbandry, supported in part by a grant from the International Minerals and Chemical Corporation, Chicago, Illinois.