Table 3.

Effects of trace mineral type (coated or uncoated) and supplementation level (300, 500, or 1,000 mg/kg) of trace minerals on the total tract nutrient digestibility of ducks.

Trace minerals	Level (mg/kg)	DM	CP	EE	Ca	P	CF
Uncoated	300	69.00	50.81	75.71	36.05	43.26	35.12
	500	70.73	50.26	77.57	36.14	42.24	36.63
	1,000	70.00	51.90	77.22	35.42	41.43	36.96
Coated	300	69.35	50.30	75.72	37.60	45.86	35.58
	500	69.45	51.56	77.69	35.25	43.85	35.89
	1,000	71.14	52.23	77.15	37.64	43.00	37.55
SEM		0.968	0.613	1.160	1.205	1.725	1.268
Main effect
Trace minerals	Coated	69.98	51.36	76.85	36.83	44.24	36.34
	Uncoated	69.91	50.99	76.83	35.87	42.31	36.24
Level	300	69.18	50.56b	75.71	36.83	44.56	35.35
	500	70.09	50.91b	77.63	35.70	43.05	36.26
	1,000	70.57	52.06a	77.19	36.53	42.21	37.26
Value of p
Trace minerals		0.891	0.289	0.973	0.136	0.044	0.872
Level		0.114	0.008	0.051	0.319	0.118	0.088
Interaction		0.179	0.137	0.991	0.128	0.859	0.651

^a,bMeans within columns not sharing a common superscript are significantly different at the 5% level of probability.