Table 6.

Serum calcium and phosphorus levels of duck breeders^c

Vitamin level	CX + 25-OH-D3	Female		Male
		Calcium, mmol/L	Phosphorus, mmol/L	Calcium, mmol/L	Phosphorus, mmol/L
REGULAR	-	2.92	2.70b	2.18	1.07
REGULAR	+	3.42	3.67a	2.47	1.62
HIGH	-	3.12	3.83a	2.42	1.58
HIGH	+	3.25	3.52a	2.50	1.63
SEM		0.06	0.15	0.05	0.09
P-value
Vitamin		0.889	0.085	0.208	0.151
CX + 25-OH-D3		0.010	0.245	0.077	0.100
Vitamin × (CX + 25-OH-D3)		0.125	0.026	0.290	0.172

^{a, b} Different superscripts in a row indicate differ significantly (P ≤ 0.05)

^c CX canthaxanthin, 25-OH-D ₃ 25-hydroxycholecalciferol