J. Anim Sci.
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J. Anim Sci. 1971. 33:157-160.
© 1971 American Society of Animal Science
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Effect of Breed, Ration Energy Level and their Interactions on Rate and Efficiency of Lamb Growth

Hudson A. Glimp1

U. S. Department of Agriculture, Clay Center, Nebraska 68933

Abstract

Three hundred and twenty-four intact male lambs from eight breeds and averaging 84 days of age and 28 kg body weight were used in a study to determine the effect of breed and ration energy level on rate and efficiency of lamb growth. Suffolk and Hampshire lambs gained faster (P<.01) than lambs from all other breeds, while Navajo lambs gained slower (P<.01) than all other breed groups. A significant (P<.01) breed-ration concentrate level interaction was observed. Suffolk and Hampshire lambs gained faster when ration energy level was increased, while ration energy level had no effect on lamb gain among the other breed groups in this study. Feed efficiency improved (P<.05) as ration energy concentration increased. With the exception of lambs receiving the 90% concentrate ration throughout the total feeding period, TDN efficiency was relatively constant.

Footnotes

1 U.S. Meat Animal Research Center, A.R.S.






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Copyright © 1971 by the American Society of Animal Science.