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Permanent link (DOI): https://doi.org/10.7939/R3M90267F

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The effects of dietary roughage level on the feedlot performance and carcass characteristics of bulls and steers Open Access

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Author or creator
Price, M. A.
Mathison, G. W.
Berg, R. T.
Additional contributors
Subject/Keyword
beef production
carcass
growth
cattle
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
An experiment is described comparing bulls and implanted steers fed diets containing three roughage levels (20, 50 and 80% alfalfa–brome hay) with two pens of four cattle in each ’sex’ × dietary roughage level subgroup. Cattle were about 12 mo old and 230kg at the start of the trial. Each animal was slaughtered when it reached 500kg. No significant castration × roughage level interactions were found for any of the feedlot or carcass traits studied. Increasing the level of roughage in the diet resulted in a significant decrease in average daily gain (P < 0.01) and an increase in average daily feed (P < 0.01) and feed per kilogram gained (P < 0.01) to 500 kg. Differences in daily digestible energy (DE) consumption and DE and feed cost per kilogram gained were not significant. Increasing the roughage level reduced all measures of carcass fatness (P < 0.05) but had no significant effect on the muscle content. Castration significantly reduced growth rate (P < 0.01) and increased feed requirement per unit of gain (P < 0.05). Steer carcasses were lighter (P < 0.01) and fatter (P < 0.01) than those of bulls and had lighter sample muscle weights (P < 0.01) and smaller sample muscle:bone ratios (P < 0.01).
Date created
1978
DOI
doi:10.7939/R3M90267F
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© 1978 Price, M.A., Mathison, G.W. and Berg, R.T.. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
Citation for previous publication
Price, M.A., Mathison, G.W. and Berg, R.T. (1978). The effects of dietary roughage level on the feedlot performance and carcass characteristics of bulls and steers. Canadian Journal of Animal Science, 58(2), 303-311. doi: 10.4141/cjas78-040
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File title: EFFECTS OF DIETARY ROUGHAGE LEVEL ON THE FEEDLOT PERFORMANCE AND CARCASS CHARACTERISTICS OF BULLS AND STEERS
File author: M. A. PRICE, G. W. MATHISON, R. T. BERG
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