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Table 4 Prediction equations of energy digestibility and energy values for pigs from values determined for rats

From: Alternative prediction methods of protein and energy evaluation of pig feeds

Equationsa

Samples type

n

R 2

Reference

DEPIG = –0.702 + 1.183 × DERAT

Diets

16

0.940

[29]

ATTDPIG E = –15.48 + 1.1615 × ATTDRAT E

Cereals

5

0.992

[31]

DEPIG = –4.489 + 1.2532 × DERAT

Cereals

5

0.996

[31]

MEPIG = –5.176 + 1.3015 × MERAT

Cereals

5

0.995

[31]

ATTDPIG E = 0.211 + 0.766 × ATTDRATE

Feedstuffs

138

0.81

[32]

ATTDPIG E = 0.104 + 0.867 × ATTDRAT E

Cereals

56

0.93

[32]

ATTDPIG E = 45.261 + 0.00549 × ATTDRAT E

Barley

18

0.971

[45]

  1. aDEPIG and DERAT: Digestible energy for pigs and rats expressed in MJ per kg dry matter, respectively; ATTDPIG E and ATTDRAT E: Apparent total tract digestibility of energy determined in pigs and rats expressed in %; R 2 – coefficient of determination