Table 7.

Effects of BL and PSE on serum antioxidant indices of weaned piglets ¹.

Items 2	PSE × BL				Pooled SEM	p-Value
	−PSE	−PSE	+PSE	+PSE		PSE	BL	Interaction
	−BL	+BL	−BL	+BL
SOD, U/mL
Day 7	33.00	28.06	29.39	29.99	1.65	0.615	0.204	0.110
Day 14	41.28	41.35	37.72	40.31	1.36	0.105	0.337	0.363
Day 21	40.50	39.09	43.32	47.15	1.39	0.001	0.393	0.074
T-AOC, U/mL
Day 7	0.96	0.99	0.94	0.96	0.03	0.492	0.458	0.818
Day 14	1.19	1.13	1.16	1.11	0.03	0.553	0.144	0.977
Day 21	1.01	1.06	1.05	1.10	0.03	0.183	0.127	0.936
CAT, U/mL
Day 7	1.29	1.01	1.28	1.18	0.28	0.764	0.506	0.760
Day 14	2.00	1.88	1.31	3.09	0.67	0.701	0.231	0.174
Day 21	1.97	2.45	2.85	2.21	0.42	0.428	0.874	0.208
MDA, nmol/mL
Day 7	6.43 A	4.18 AB	3.49 B	5.15 AB	0.77	0.011	0.095	0.046
Day 14	4.44	3.37	3.39	3.18	0.36	0.094	0.086	0.241
Day 21	6.26	5.18	5.03	5.52	0.49	0.377	0.562	0.128
GSH-Px, U/mL
Day 7	702.23	717.85	683.92	845.08	44.27	0.233	0.060	0.116
Day 14	545.64	472.86	472.29	566.19	41.67	0.813	0.803	0.060
Day 21	527.64	520.25	478.45	444.24	48.77	0.214	0.674	0.786

¹ Values were presented as means ± pooled SEM, n = 6. ² BL, multi-strain probiotics; PSE, Perilla frutescens seed extract; −PSE−BL, basal diet; +PSE−BL, basal diet + 1 g/kg Perilla frutescens seed extract; +BL−PSE, basal diet + 2 g/kg multi-strain probiotics; +BL + PSE, basal diet+2 g/kg multi-strain probiotics + 1 g/kg Perilla frutescens seed extract. ^A,B Different letters on the shoulders of peers indicate significant differences (p < 0.05).