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The Effect of Fluorine in Rock Phosphate in the Nutrition of Fattening Lambs¹

Purdue University Agricultural Experiment Station²

Abstract

1. Rock phosphate containing 3.85 per cent fluorine was fed as a mineral supplement to fattening lambs in amounts furnishing 1.5, 3.0, and 6.0 milligrams of fluorine per kilogram of body weight per day.
   
2. Grain consumption was decreased and growth depressed in the lot receiving 6.0 milligrams of fluorine per kilogram of body weight per day.
   
3. As the fluorine intake was increased the breaking strength per gram of bone decreased proportionally, and the percentages of ash and fluorine in the bone increased.
   
4. The weight of the thyroid gland decreased as the amount of fluorine wasincreased in the ration.
   

¹ Supported in part by a grant: from the Moorman Manufacturing Company, Quincy, Illinois. Some of the data presented are from a thesis to be submitted by J. D. Hatfield to the Graduate School of Purdue University in partial fulfillment of requirements for the degree of Doctor of Philosophy.

² Departments of Agricultural Chemistry and Veterinary Science, Lafayette, Indiana.