J. Anim Sci.
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J. Anim Sci. 1969. 28:406-411.
© 1969 American Society of Animal Science
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Factors Affecting the Utilization of High Urea Diets by Finishing Steers1

R. S. Lowrey and W. C. McCormick2

Georgia Coastal Plain Experiment Station, Tifton,3

Abstract

Two feeding trials and a metabolism trial were conducted with both steer calves and yearling steers to (1) compare cottonseed meal and urea as nitrogen supplements in the diets of finishing steers, (2) determine if addition of dehydrated alfalfa or Coastal bermudagrass meals affect the utilization of urea and (3) observe the response of both calves and yearlings fed high urea diets.

No significant treatment differences occurred in performance criteria with the yearlings although average daily gain tended to be less on all of the high urea diets. The addition of 2.2% alfalfa meal or 2.2% Coastal bermudagrass meal to the high urea diet improved gain 11.2 (P<.05) and 7.1% respectively, for steer calves. Group feed intake by both the calves and yearlings was lower on the high urea diets but feed efficiency was about the same for all diets.

Nitrogen digestibility increased for both calves and yearlings when urea was substituted for cottonseed meal. When nitrogen utilization was expressed on the basis of percent of digested nitrogen retained, treatments were similar.

Footnotes

1 University of Georgia College of Agriculture Experiment Stations, Coastal Plain Station, Tifton, Journal Series Paper No. 328.

2 The authors gratefully acknowledge Masonite Corporation. Chicago, Illinois for the hemicellulose extract (Masonex) and E. I. du Pont de Nemours and Company, Atlanta, Georgia for the urea.

3 Department of Animal Science.






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Copyright © 1969 by the American Society of Animal Science.