Energy content and feed evaluation systems
01.02.2008
Abstract
All countries do not use the same feed evaluation system. It is
therefore interesting to investigate the correlation between feed
units in the Danish feed evaluation system and energy calculations
in foreign feed evaluation systems.
Below, a comparison is shown of typical diets in various energy
calculations.
Comparison between different energy calculations
All countries do not use the same feed evaluation system. It is
therefore interesting to investigate the correlation between feed
units in the Danish feed evaluation system (based on physiological
energy) and energy calculations in foreign feed evaluation
systems.
In table 1, the energy content of typical diets is calculated in
different feed evaluation systems. For estimation of the French and
Dutch net energies (NE), the energy coefficients of the two
countries were entered into the Danish equation for calculation of
potential physiological energy (PPE), and are thereby estimated via
the Danish in vitro digestibilities EFOS and EFOSi. This method was
proven applicable at a seminar held in Denmark in 2003 attended by
French, Dutch, British and Danish experts within this field.
However, the conversions are only guiding as differences in
digestibilities and in the ingredients used cannot be ruled
out.
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Table 1. Guiding figures for conversion of energy values in
standard diets (per kg ingredient)
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Animal group
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FUgp / FUsow
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Metabolic Energy (Danish ME, old system)
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Net Energy (French NE) for sows / growing
pigs
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Net Energy (Dutch NE) for sows / growing pigs
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Potential Physiological Energy (PPE) for sows /
growing pigs
|
|
|
|
MJ
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MJ/FU
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MJ
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MJ/FU
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MJ
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MJ/FU
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MJ
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MJ/FU
|
|
Lactating sows
|
1.06 FUsow
|
13.0
|
12.2
|
9.9
|
9.3
|
9.3
|
8.8
|
8.2
|
7.70
|
|
Gestating sows
|
0.99 FUsow
|
12.0
|
12.2
|
9.2
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9.3
|
8.7
|
8.8
|
7.6
|
7.70
|
|
Weaned pigs (6-9 kg)
|
1.18 FUgp
|
13.9
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11.8
|
10.4
|
8.8
|
9.9
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8.4
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8.7
|
7.38
|
|
Weaners (9-30 kg)
|
1.17 FUgp
|
14.1
|
12.0
|
10.3
|
8.8
|
9.8
|
8.4
|
8.6
|
7.38
|
|
Finishers (30-100 kg)
|
1.07 FUgp
|
13.1
|
12.2
|
9.6
|
9.0
|
9.0
|
8.4
|
7.9
|
7.38
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For more information in Danish on the Danish feed evaluation
system, see the section on Feed Evaluation.
You can also find more information on the background of the
Danish feed evaluation system including comparisons with other feed
evaluation systems in [1]. References
[1] Tybirk, Per; Strathe, Anders Bjerring; Vils, Else; Sloth, Niels
Morten & Boisen, Sigurd (2006). Det danske
fodervurderingssystem til svinefoder. Rapport nr. 30, Dansk
Svineproduktion, Landscentret.
(Enzym Fordøjeligt Organisk Stof, ileum) er en metode, hvor energiindhold bestemmes ved en kombination af kemiske og enzymatiske metoder. Denne analyse udtrykker fordøjelighed målt ved ileum. De kemiske analyser omfatter bestemmelse af råprotein, råfedt, råaske og tørstof.
(Enzym Fordøjeligt Organisk Stof) er en metode, hvor energiindhold bestemmes ved en kombination af kemiske og enzymatiske metoder. De kemiske analyser omfatter bestemmelse af råprotein, råfedt, råaske og tørstof.
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