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Effects of feed restriction during the laying period on the performance of two strains of mature caged commercial layers in the humid tropics

Published online by Cambridge University Press:  27 March 2009

K. Benyi ,
O. Akinokun  and
S. H. B. Lebbie
K. Benyi
Affiliation:
Department of Animal Science, University of Ife, Ile-Ife, Nigeria
O. Akinokun
Affiliation:
Department of Animal Science, University of Ife, Ile-Ife, Nigeria
S. H. B. Lebbie
Affiliation:
Department of Animal Science, University of Ife, Ile-Ife, Nigeria
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Summary

Two strains of commercial layers, 42 weeks old, were fed ad libitum, 85 and 70% of ad libitum for five 28-day periods to study the effects of feed restriction on body weight, carcass characteristics, laying performance and mortality. There were highly significant strain effects on all traits (P < 0·01) except dressing percentage. Period differences were also observed for egg production, egg weight and feed efficiency. In addition, in all cases the relationship between period and these traits was non-linear and was affected by strain or treatment.

Feed restriction had significant effects (P < 0·01) on all traits except dressing percentage and mortality. Feed restriction to 70% of ad libitum reduced egg production, egg weight, body weight and feed consumption and improved feed efficiency. However, in most cases there was no difference between ad libitum feeding and 15% feed restriction.

Strain × treatment interaction had significant effects on egg production and feed efficiency.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 96 , Issue 1 , February 1981 , pp. 195 - 203
Copyright
Copyright © Cambridge University Press 1981

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