Table 8. Effects of vitamin supplementation levels in gestation diets on blood profiles of sows in the lactation period

	Treatment¹⁾				SEM	p-value
	V1	V3	V6	V9	SEM	Lin.	Quad.
25-(OH) vitamin D (ng/mL)
24 hours postpartum	143.0	131.4	152.4	164.4	7.61	0.377	0.239
21 days of lactation	138.75	120.4	137.8	152.8	5.59	0.185	0.207
Vitamin E (Tocopherol) (μgmol/L)
24 hours postpartum	3.5	5.4	6.5	5.6	0.52	0.141	0.133
21 days of lactation	7.4	5.7	5.0	6.2	0.43	0.313	0.088
Calcium (mg/dL)
24 hours postpartum	9.4	10.0	10.0	9.7	0.16	0.592	0.185
21 days of lactation	10.1	10.2	9.7	10.1	0.11	0.654	0.372
Phosphorus (mg/dL)
24 hours postpartum	8.6	6.2	7.8	7.4	0.36	0.689	0.237
21 days of lactation	6.2	6.3	6.0	6.1	0.14	0.693	0.920

Treatment: V1, corn-soybean meal (SBM) based diet with 1× National Research Council (NRC, 2012) vitamin requirement; V3, corn-SBM-based diet with 3× NRC (2012) vitamin requirement; V6, corn-SBM-based diet with 6× NRC (2012) vitamin requirement; V9, corn-SBM-based diet with 9× NRC (2012) vitamin requirement.
Lin., linear; Quad., quadratic.