Table 5. Effects of stocking density (SD) and dietary supplementation of vitamin C (Vit C) on liver antioxidant status of broiler chickens

Treatment		Antioxidant status
SD (birds/m2)	Vit C (mg/kg)	MDA (μm/mg protein)	TAC (U/mg protein)
9	0	1.71	713
	200	1.84	702
18	0	1.69	681
	200	1.66	694
SEM (n = 6)		0.178	10.3
Main effect
SD (birds/m2)
9		1.78	707
18		1.67	688
SEM (n = 12)		0.126	7.3
Vit C (mg/kg)
0		1.70	697
200		1.75	698
SEM (n = 12)		0.126	7.3
Effect (p-value)	df
SD	1	0.57	0.07
Vit C	1	0.77	0.92
SD × Vit C	1	0.66	0.27

MDA, malondialdehyde; TAC, total antioxidant capacity.