Table 6.

Effects of trace mineral type (coated or uncoated) and supplementation level (300, 500, or 1,000 mg/kg) of trace minerals on fecal excretion ion metals contents in ducks (mg/kg).

Trace minerals	Level (mg/kg)	Se	Zn	Fe	Cu	Mn
Uncoated	300	0.56	3.00	7.80c,d	0.33	2.43
	500	0.91	3.37	9.47b	0.33	3.40
	1,000	1.16	3.63	14.2a	0.40	3.27
Coated	300	0.49	2.53	7.13d	0.27	2.00
	500	0.81	2.87	8.20c	0.37	2.50
	1,000	1.08	3.30	8.23c	0.4	2.90
SEM		0.118	0.378	0.503	0.057	0.147
Main effect
Trace minerals	Coated	0.79	2.9	7.86	0.34	2.47
	Uncoated	0.88	3.33	10.49	0.36	3.03
Level	300	0.52c	2.77b	7.47c	0.30	2.22b
	500	0.86b	3.12a,b	8.83b	0.35	2.95a
	1,000	1.12a	3.47a	11.22a	0.40	3.08a
Value of p
Trace minerals		0.224	0.038	<0.001	0.712	<0.001
Level		<0.001	0.031	<0.001	0.051	<0.001
Interaction		0.976	0.928	<0.001	0.397	0.057

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