. 2020 Jan 22;99(3):1241–1253. doi: 10.1016/j.psj.2019.10.068

Table 7.

Effects of 25-OH-D3 and vitamin regimen on serum biochemistry for meat duck at 49 D of age.

Item		Ca, mmol/L	P, mmol/L	25-OH-D, ng/L	PTH, ng/L	ALP, UI/L	P1NP, μg/L
Vitamin level	25-OH-D3
NRC	−	2.33^c	3.61	435.78^c	39.84	773.50^a	14.49^a
NRC	+	2.44^a,b	3.72	475.62^a,b	37.79	741.83^b	12.35^b
NY/T	−	2.37^b,c	3.66	453.65^b	38.40	755.83^a,b	13.40^a,b
NY/T	+	2.46^a	3.76	488.78^a	37.96	7,340^b	11.89^b
SEM		0.03	0.04	8.36	1.64	20.53	0.42
Vitamin regimen
NRC		2.39	3.66	455.70^b	38.81	757.67	13.42
NY/T		2.41	3.71	471.21^a	38.18	744.92	12.64
SEM		0.02	0.03	5.91	1.16	14.52	0.310
25-OH-D3
−		2.34^b	3.63	444.72^b	39.12	764.67^a	13.94^a
+		2.45^a	3.74	482.19^a	37.87	737.92^b	12.11^b
SEM		0.02	0.03	5.91	1.16	14.52	0.31
P-value
Vitamin regimen		0.433	0.259	0.041	0.705	0.398	0.083
25-OH-D3		0.004	0.058	0.003	0.456	0.032	0.004
Interaction		0.833	0.929	0.755	0.630	0.068	0.471

^a–c Mean values with unlike letters were significantly different (two-way ANOVA, P < 0.05, Tukey's post hoc test).

Abbreviations: 25-OH-D, 25-hydroxycholecalciferol; ALP, alkaline phosphatase; Ca, calcium; NY/T, China Agricultural industry standards; P, phosphorus; P1NP, procollagen type I N-terminal propeptide; PTH, parathyroid hormone.