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Utilization of free lysine by growing pigs

Published online by Cambridge University Press:  09 March 2007

E. S. Batterham  and
R. D. Murison
E. S. Batterham
Affiliation:
NSW Department of Agriculture, Agricultural Research Centre, Wollongbar, New South Wales 2480, Australia
R. D. Murison
Affiliation:
NSW Department of Agriculture, Agricultural Research Centre, Wollongbar, New South Wales 2480, Australia
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Abstract

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1. The results of nine estimates of the efficiency of utilization of supplements of free lysine by growing pigs fed once daily and reported by Batterham (1974) and Batterham & O'Neill (1978) were re-analysed using carcass rather than live-weight values as the criteria of response.

2. The efficiency of utilization of free lysine with once daily feeding relative to frequent feeding was 0·53 using carcass gain as the criterion of response (P < 0·001), and 0·56 using food conversion efficiency on a carcass basis (P < 0·001). These estimates were lower than estimates of 0·67 using live-weight gain (P < 0·01) and 0·77 using food conversion ratio on a live-weight basis (P < 0·05).

3. The results indicate that current estimates of the lysine requirements of pigs that are based on responses to supplements of free lysine under once daily feeding regimens may be 10–30% over-estimated, as a result of incomplete utilization of the free lysine.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 46 , Issue 1 , July 1981 , pp. 87 - 92
Copyright
Copyright © The Nutrition Society 1981

References

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