Y (basal diet supplemented with only 0.5% yeast);
Z (basal dietsupplemented with only 1.5% zeolite);
Y+Z (basal diet supplemented with 0.5% yeast+1.5% zeolite)
Y+C (basal diet supplemented with 0.5% yeast+ 1.5%charcoal);
Z+C (basal diet supplemented with 1.5% zeolite+1.5% charcoal);
Y+Z+C (basal diet supplemented with 0.5%.yeast+1.5% zeolite + 1.5% charcoal).
a–fRow Means with different superscripts differ significantly (P< 0.05).