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The effects of sex and live weight on the growing pig's response to dietary protein

Published online by Cambridge University Press:  02 September 2010

R. G. Campbell ,
M. R. Taverner  and
D. M. Curic
R. G. Campbell
Affiliation:
Animal Research Institute, Werribee, Victoria, 3030, Australia
M. R. Taverner
Affiliation:
Animal Research Institute, Werribee, Victoria, 3030, Australia
D. M. Curic
Affiliation:
Animal Research Institute, Werribee, Victoria, 3030, Australia
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Abstract

Thirty-two entire male and 32 female pigs were used to investigate responses to eight concentrations of dietary protein, with constant amino acid composition ranging from 90 to 248 g/kg over different live-weight stages between 20 and 90 kg.

With increasing live weight there was a continuous decline in the concentrations of dietary protein required to support maximum growth and an increasing difference between the sexes in their response to dietary protein. Between 20 and 40 kg live weight sex had no significant effect on growth performance or on the dietary protein concentration for maximum growth (P > 0·05). Over all heavier live-weight stages entire males grew faster and more efficiently than females, and between 20 and 70, 20 and 80, 20 and 90 and between 50 and 90 kg live weight they responded to higher concentrations of dietary protein than females. During the latter stages of growth, the performance of females was also depressed on the two highest-protein diets. This was associated with a significant increase in carcass fat thickness at 90 kg.

Type
Research Article
Information
Animal Production , Volume 46 , Issue 1 , February 1988 , pp. 123 - 130
Copyright
Copyright © British Society of Animal Science 1988

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References

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