Table 3.

Effect of mulberry powder on serum antioxidative parameters of Xiangcun black finishing pigs.

Item	Mulberry inclusion level, %					SEM	P-value
	0	3	6	9	12		ANOVA	Linear	Quadratic
T-SOD, U/mL	95.04	101.89	98.18	92.19	106.83	4.37	0.17	0.36	0.48
GPx, U/mL	987.48b	979.60b	980.71b	1,042.36a	1,014.80ab	17.19	0.06	0.04	0.12
T-AOC, U/mL	1.49	1.49	1.77	1.33	1.27	0.17	0.30	0.27	0.24
GSH, mg/L	7.55b	10.45ab	10.44ab	11.11ab	13.45a	1.29	0.06	<0.01	0.02
MDA, nmol/mL	3.04	3.93	3.82	3.75	2.99	0.74	0.83	0.86	0.50

T-SOD = total superoxide dismutase; GPx = glutathione peroxidase; T-AOC = total antioxidant capacity; GSH = glutathione; MDA = malonaldehyde.

^{a, b} Within a row, values with different superscript letters differ (P < 0.05). n = 6.