J. Anim Sci.
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J. Anim Sci. 1960. 19:156-163.
© 1960 American Society of Animal Science
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Effects of Time and Level of Supplementation on Beef Steers Fed Alfalfa Soilage or Hay

G. P. Lofgreen1, J. H. Meyer1 and N. R. Ittner2

University of California, Davis

Abstract

A study on the time of concentrate supplementation to rations made up of maximum amounts of alfalfa hay or alfalfa soilage indicated that a continuous supplement of barley and beet pulp was superior to a supplement fed only the second half of the feeding period. Although daily gains were not stimulated, the dressing percent and carcass grades were improved. Evidence is presented showing the gains made by the steers being continuously supplemented contained more energy than the gains of the other groups.

A second study indicated that the level of continuous barley and beet pulp supplementation to alfalfa soilage should amount to approximately 0.7 lb. per 100 lb. body weight. This level did not significantly stimulate daily gains above 0.5 lb. per 100 lb. body weight but increased the dressing percent and carcass grade. Evidence is presented showing that this level increased the energy content of the gain, although not significantly increasing the gain. The data presented emphasize the danger of misinterpretation of the results of feeding trials based solely on weight gain and feed consumption.

The estimated NE in megacal. per pound of TDN varied from an average of 0.79 for roughage alone to 0.93 for rations averaging 68% roughage and 32% barley and beet pulp.

Footnotes

1 Department of Animal Husbandry, Davis, California.

2 Department of Animal Husbandry, Imperial Valley Field Station, El Centro, California (deceased).






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