Table 7.

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

Trace minerals	Level (mg/kg)	Se (μg/ml)	Zn (μg/ml)	Fe (μg/ml)	Cu (ng/ml)	Mn (μg/ml)
Uncoated	300	142.17c	1.97	129.03	135.02	6.79
	500	164.81b	2.10	156.49	147.07	7.41
	1,000	185.52a	2.15	151.15	148.94	8.05
Coated	300	151.54b,c	2.14	137.43	138.40	6.89
	500	197.07a	2.26	154.56	138.18	8.03
	1,000	193.79a	2.35	148.21	157.20	8.13
SEM		10.767	0.152	20.137	21.028	1.763
Main effect
Trace minerals	Coated	180.80	2.25	146.73	144.59	7.68
	Uncoated	164.17	2.07	145.56	143.68	7.42
Level	300	146.86b	2.06b	133.23b	136.71±	6.84
	500	180.94a	2.18a,b	155.53a	142.63	7.72
	1,000	189.65a	2.25a	149.68a,b	153.07	8.09
Value of p
Trace minerals		<0.001	0.002	0.762	0.899	0.688
Level		<0.001	0.022	0.027	0.187	0.285
Interaction		<0.001	0.973	0.433	0.608	0.929

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