3.1. Coefficient of total tract apparent digestibility (CTTAD)
Mean and SD of pig weights were not different among treatments but increased (P < 0.001) throughout the experimental
period: 52.3 (±2.20, SD) and 60.8 (±2.71) for batches 1 and 2, respectively. Protein source had a significant effect (P = 0.001)
on diet CP digestibility with the highest value obtained for SFM and the lowest for SB and WDDGS-based diets (Table 4).
Apparent faecal digestibility of fibrous constituents: hemicellulose (HEM), cellulose (CEL) and SF were affected by type of
diet, with the highest values determined for the SB diet and the lowest for WDDGS. The differences among diets were more
significant (P < 0.001) for CEL and SF than for HEM (P < 0.014).