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Journal of Dairy Science Vol. 18 No. 8 511-526
© 1935 by American Dairy Science Association ®
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Vitamin D Studies in Cattle

I. The Antirachitic Value of Hay in the Ration of Dairy Cattle*

F. C. Huffman, C. W. Duncan and C. C. Lightfoot

Section of Dairy Husbandry and Section of Chemistry of the Michigan Agricultural Experiment Station, East Lansing

ABSTRACT

  1. Anorexia, which is usually associated with rickets in calves, was responsible for the lack of hay consumption under the conditions of this investigation.
  2. It is difficult to use the curative method with calves when testing the antirachitic potency of roughages.
  3. Two pounds of sun-cured timothy hay prevented rickets in calf C-100 up to 1 year of age and 3 pounds of sun-cured timothy cured rickets in C-98 at 9 months of age.
  4. Two pounds of sun-cured alfalfa hay prevented rickets in calf C-216 up to 195 days of age and 1 pound of sun-cured hay protected C-252 up to 192 days of age.
  5. The results indicate that the vitamin D requirement increases with age or size of the growing bovine and also that the requirement varies from individual to individual.
  6. The calves used in this investigation showed three distinct conditions associated with rickets from the standpoint of blood analyses, (1) normal calcium, low phosphorus, (2) low calcium, normal phosphorus, and (3) low calcium, low phosphorus.

Addenda:

Since the acceptance of this paper for publishing G. C. Willis, L. S. Palmer and T. W. Gullickson reported that prairie hay may carry appreciable amounts of vitamin D.

JOURNAL DAIRY SCIENCE 18: 213, 1935.

FOOTNOTES

* Published with the permission of the Director of the Experiment Station as Journal Article No. 211 (n. s.).






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Copyright © 1935 by the American Dairy Science Association ®.