Fig. 2.

Relationship between apparent total tract digestibility (ATTD) of organic matter (OM) determined using either (A) acid-insoluble ash (AIA) or (B) chromic oxide (Cr₂O₃) as an indigestible marker and determined using total faecal collection. Data are for individual pigs (n = 5 for each diet) fed either CSM in a sugar-starch-based (Δ), CSM in a wheat-based (□), SBM in a sugar-starch-based (▲), SBM in a wheat-based (■) or a wheat (○) diet. The line of unity is represented by the dashed line while the solid line is the linear regression line. The regression equations are (A) y = 1.29 (SE 4.66) + 0.978 (SE 0.0561)x, R² = 0.927 and (B) y = 29.7 (SE 4.24) + 0.663 (SE 0.0529)x, R² = 0.867.