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The digestible and metabolizable energy value of copra meals and their prediction from chemical composition

Published online by Cambridge University Press:  02 September 2010

P. J. Thorne ,
J. Wiseman ,
D. J. A Cole  and
D. H. Machin
P. J. Thorne
Affiliation:
University of Nottingham, Faculty of Agricultural and Food Sciences, Sutton Bonington, Loughborough LE12 5RD
J. Wiseman
Affiliation:
University of Nottingham, Faculty of Agricultural and Food Sciences, Sutton Bonington, Loughborough LE12 5RD
D. J. A Cole
Affiliation:
University of Nottingham, Faculty of Agricultural and Food Sciences, Sutton Bonington, Loughborough LE12 5RD
D. H. Machin
Affiliation:
Overseas Development and Natural Resources Institute, Central Avenue, Chatham Maritime, Chatham ME4 4TD
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Abstract

Digestible (DE) and metabolizable (ME) energy values for five copra meals and a sample of raw copra, with oil contents ranging from 4 to 662 g/kg, were determined with both a high and a low energy basal diet in a metabolism experiment using 16 female pigs. Determined DE values ranged from 12·68 to 29·92 MJ/kg dry matter (DM) and values for ME from 11·95 to 29·08 MJ/kg DM which was a reflexion of their residual oil contents. Regression equations for the six samples were derived with DE and ME as dependent variables and chemical measurements and gross energy as independent variables. The best equation based on a single chemical parameter (ether extract (EE)) was:

Improvements associated with including more than one independent variable in the regression analysis were marginal. The most accurate equation (in terms of minimized residual s.d.) based on EE and crude fibre (CF) was:

Type
Research Article
Information
Animal Production , Volume 49 , Issue 3 , December 1989 , pp. 459 - 466
Copyright
Copyright © British Society of Animal Science 1989

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References

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