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Journal of Dairy Science Vol. 19 No. 6 359-372
© 1936 by American Dairy Science Association ®
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Vitamin D Studies in Cattle

IV. Corn Silage as a Source of Vitamin D for Dairy Cattle*

H. Ernest Bechtel**, C. F. Huffman, C. W. Ducan and C. A. Hoppert

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

ABSTRACT

  1. It was the purpose of this investigation to determine the antirachitic value of corn silage for dairy calves by the use of both curative and preventive feeding trials.
  2. Samples of corn silage for the years 1931–1934 contained from 122 to 165 U. S. P. vitamin D units per pound of dry matter.
  3. Calves less than 190 days of age were unsuitable test animals for both curative and preventive trials because of anorexia and failure to ingest adequate amounts of silage. In one instance, the feeding of corn silage to a yearling calf failed to cure severe rickets complicated with muscle atrophy and erosion of the articular surfaces.
  4. The daily ingestion of an equivalent of 7.0 to 10.0 gm. of dry corn silage per kilo of body weight was effective in curing and preventing rickets in yearling calves and also supplied sufficient antirachitic material for normal growth and reproduction in dairy cows.
  5. When corn is cut at the usual stage of maturity for corn silage it possesses definite antirachitic qualities when fed to dairy cows.

The writers are indebted to Mr. C. C. Lightfoot for technical assistance in the determination of the blood values and to Mr. O. B. Winter and Miss Lillian I Butler for the chemical analyses of the feeds.

FOOTNOTES

* Published with the permission of the Director of the Experiment Station as Journal Article No. 250 (n.s.).

** This manuscript is part of a dissertation presented to theFaculty of the Graduate School of Michigan State College in partial fulfillment of the requirements for the degree of Doctor of Philosophy.






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Copyright © 1936 by the American Dairy Science Association ®.