Table 7.

Equations for predicting DE and ME contents in cereal feed ingredients for growing pigs.

Item	Prediction Equation	R 2	p-Value
1	DE (MJ/kg) = −0.1740 × ADF (%) + 14.3722	0.7899	<0.01
2	DE (MJ/kg) = 0.1364 × Starch (%) − 0.2352 × ADF (%) + 11.4467	0.8633	<0.01
3	ME (MJ/kg) = 0.9716 × DE (MJ/kg) + 0.0636	0.9907	<0.01
4	ME (MJ/kg) = 0.9838 × DE (MJ/kg) − 0.0165 × CP (%) + 0.0538	0.9943	<0.01

The equations were developed based on the chemical compositions (as-fed basis) of 13 cereals. The coefficient of determination (R²) was used to determine the best prediction equation, and the largest R² value was taken to indicate the best prediction model. ADF, acid detergent fiber; CP, crude protein; DE, digestible energy; ME, metabolizable energy.