Table 7.

Effects of iron (Fe) and Bacillus subtilis supplementation on serum antioxidant capacity of breeder geese.¹

Treatment		T-AOC (U/mL)	CAT (U/mL)	T-SOD (U/mL)	MDA (nmol/mL)
Fe (mg/kg)	B. subtilis (CFU/kg)
40	2.5 × 109	8.30	1.23	297.72	1.79
60	2.5 × 109	11.91	1.24	327.37	1.72
80	2.5 × 109	13.24	1.5	345.52	1.54
40	5.0 × 109	14.12	1.18	378.2	1.71
60	5.0 × 109	19.11	2.01	364.89	0.69
80	5.0 × 109	15.90	1.25	329.41	1.04
SEM		1.36	0.21	28.62	0.23
Main effect
Fe (mg/kg)	40	11.21b	1.21	337.96	1.75
	60	15.51a	1.62	346.13	1.21
	80	14.57a	1.38	337.47	1.29
B. subtilis (CFU/kg)	2.5 × 109	11.15b	1.32	323.54	1.68a
	5.0 × 109	16.38a	1.48	357.5	1.14b
P-value
Fe		0.022	0.161	0.949	0.053
B. subtilis		<0.001	0.381	0.181	0.008
Fe × B. subtilis		0.308	0.054	0.294	0.133

^a,bMeans within the same column with different superscripts differ significantly (P < 0.05).

Abbreviations: CAT, catalase; MDA, malondialdehyde; T-AOC, total antioxidant capacity; T-SOD, total superoxide dismutase.

¹Data represent the means of 4 replicates, with 2 female geese per replicate.