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Energy values in pig nutrition:II. The prediction of energy values from dietary chemical analysis

Published online by Cambridge University Press:  27 March 2009

D. J. Morgan ,
D. J. A. Cole  and
D. Lewis
D. J. Morgan
Affiliation:
University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics.
D. J. A. Cole
Affiliation:
University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics.
D. Lewis
Affiliation:
University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics.
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Summary

Eighteen individual feedstuffs and 19 mixed diets were used in a study attempted to relate determined energy values to various chemically determined measures. For cereals the level of fibre could be used to predict digestible and metabolizable energy (DE and ME). In the case of DE the relationships with crude fibre and modified acid detergent fibre (MADF) based on 14 feeds were:

DE (kcal/kg D.M.) = 4179–86 MADF (%): r =–0·96; P < 0·01,

DE (kcal/kg D.M.) = 4228–140 x crude fibre (%): r =–0·97; P < 0·01.

For all feeds the following equations gave the best prediction of energy values from dietary analysis (on the basis of correlation coefficients and residual standard deviations):

DE (kcal/kg D.M.) = 109·9 x crude protein (%) + 149·3 x acid ether extract (%) + 90·1 x nitrogen-free extract (%)–5030: R = 0·95; P < 0.01.

ME (kcal/kg D.M.) = 99·5 x crude protein (%) + 144·7 x acid ether extract (%) + 87·8 x nitrogen-free extract (%)–4795: R = 0·94; P < 0·01.

Digestible nutrients were closely related to DE and ME, e.g.

DE (kcal/kg D.M.) = 52·9 x digestible crude protein (%) + 108·3 x digestible ether extract (%) + 39·4 x digestible crude fibre (%) + 39·9 x digestible nitrogen-free extract (%) + 183·7: R = 0·99; P < 0·01.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 84 , Issue 1 , February 1975 , pp. 19 - 27
Copyright
Copyright © Cambridge University Press 1975

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References

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