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The Effect of Feeding Raw Rock Phosphate on the Fluorine Content of the Organs and Tissues of Dairy Cows

Department of Agricultural Chemistry, University of Wisconsin, Madison

G. Bohstedt

Department of Animal Husbandry, University of Wisconsin, Madison

ABSTRACT

Fluorine was found to occur in all of the normal tissues studied. The greatest quantity of fluorine was found to accompany calcium and phosphorus deposition. Thus the bones and teeth contained large quantities of fluorine while the more active organs such as the liver, kidney, heart muscle, and the other tissues studied showed only small quantities of fluorine.

The quantity of flourine present in normal The fluorine content of the liver, kidney, heart muscle, pancreas, thyroid, tendon, hair, and hoof was found to be less than 1 milligram per 100 grams of dried normal tissue. The inclusion of 0.088 per cent fluorine in the grain mixture resulted in an increased storage of fluorine in the bones and teeth. This amounted to 16 to 25 times that found in normal osseous structures. The internal organs, tendon, and hair likewise doubled in fluorine content when the grain mixture contained 0.088 per cent fluorine.