J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Montano-Bermudez, M.
Right arrow Articles by Nielsen, M. K.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Montano-Bermudez, M.
Right arrow Articles by Nielsen, M. K.

Journal of Animal Science, Vol 68, Issue 8 2297-2309, Copyright © 1990 by American Society of Animal Science

JOURNAL ARTICLE

Biological efficiency to weaning and to slaughter of crossbred beef cattle with different genetic potential for milk

M. Montano-Bermudez and M. K. Nielsen
University of Nebraska-Lincoln 68583-0908.

Biological efficiency of beef production to weaning and to slaughter was estimated in three groups of cattle reasonably similar in growth and mature size but different in the amount of milk available to the calves (low (L) = Hereford x Angus, medium (M) = Red Poll x Angus and high (H) = Milking Shorthorn x Angus). Efficiency was defined as the ratio of estimated kilograms of calf weight weaned or carcass weight produced by a herd of 100 first-cross cows to estimated metabolizable energy (ME) intake by the cows and preweaning non-milk ME intake by the calves or preweaning non-milk and postweaning ME intake by the calves. Efficiencies were estimated assuming observed and average reproductive rates, and using observed energy requirements for maintenance, as well as the same requirements for maintenance in the M and H groups. With the observed reproductive rates and requirements for maintenance, efficiencies to weaning and to slaughter were 28.1, 27.4 and 27.4 g weaning weight per Mcal ME and 22.0, 20.6 and 20.3 g carcass weight per Mcal ME for the L, M and H groups, respectively. With average requirements for maintenance, efficiencies were 28.2 and 27.5 to weaning and 20.8 and 20.4 to slaughter for the M and H groups, respectively. Under equal reproductive rates and observed maintenance requirements, efficiencies were 28.3, 27.2 and 27.7 to weaning, and 22.1, 20.6 and 20.6 to slaughter for the L, M and H groups, respectively. With average maintenance requirements, efficiencies were 27.5 and 27.4 to weaning and 20.7 and 20.5 to slaughter for the M and H groups, respectively. Across the production output and input assumption scenarios, the L group consistently was the most efficient, especially when evaluated at slaughter of calves.


This article has been cited by other articles:


Home page
 J ANIM SCIHome page
C. R. Johnson, D. L. Lalman, M. A. Brown, L. A. Appeddu, D. S. Buchanan, and R. P. Wettemann
Influence of milk production potential on forage dry matter intake by multiparous and primiparous Brangus females
J Anim Sci, July 1, 2003; 81(7): 1837 - 1846.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1990 by the American Society of Animal Science.