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A note on the effects of variations in food intake on nitrogen retention in control and selection lines of Large White pigs

Published online by Cambridge University Press:  02 September 2010

Ruth Henderson ,
C. T. Whittemore ,
M. Ellis ,
W. C. Smith  and
R. Laird
Ruth Henderson
Affiliation:
Edinburgh School Of Agriculture, West Mains Road, Edinburgh EH9 3JG
C. T. Whittemore
Affiliation:
Edinburgh School Of Agriculture, West Mains Road, Edinburgh EH9 3JG
M. Ellis
Affiliation:
Faculty of Agriculture, University of Newcastle upon Tyne, Newcastle upon Tyne NE1 7RU
W. C. Smith
Affiliation:
Faculty of Agriculture, University of Newcastle upon Tyne, Newcastle upon Tyne NE1 7RU
R. Laird
Affiliation:
West of Scotland Agricultural College, Auchincruive, Ayr KA6 5HW
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Abstract

Fifty-three 7-day nitrogen balances were made using 13 control (C) and 15 selection line (S) Large White boars. Six feeding treatments were imposed, ranging from a Jevel estimated to maintain weight to a level aimed at inducing a fast growth rate from giving food twice daily to appetite for 30 min. Nitrogen retention did not differ significantly, but C boars retained slightly more than S boars at the lowest food intake, while S boars retained Slightly more than C boars at higher food intakes. The slopes of the regression of nitrogen retention against food intake for growth was steeper for S than for C boars (P > 0·05). It is concluded that great care should be taken in using metabolism experiment results to predict changes in body composition.

Type
Research Article
Information
Animal Production , Volume 38 , Issue 3 , June 1984 , pp. 511 - 514
Copyright
Copyright © British Society of Animal Science 1984

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References

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