Table 4.

Egg quality from white laying hens fed different sources and levels of Zn, Mn, and Cu from 78 to 98 weeks of age.

Item	Egg quality
	Yolk color	Albumen height, mm	Albumen weight, g	Eggshell weight, g	Yolk weight, g	Eggshell thickness, mm	Albumen1, %	Eggshell1, %	Yolk1, %	Haugh unit
ZMCGly source	5.22	7.64	44.2B	6.18	18.2	0.41B	64.4	9.02	26.6	85.0
ZMCAA source	5.22	8.25	45.0A	6.28	18.3	0.47A	64.5	9.08	26.4	88.5
Low level	5.20	7.83	44.6	6.25	18.2	0.44	64.5	9.09	26.5	86.1
High level	5.25	8.05	44.6	6.21	18.3	0.44	64.5	9.01	26.5	87.4
P-value
Source	0.921	<0.001	0.014	0.087	0.667	<0.001	0.779	0.439	0.666	<0.001
Level	0.267	0.011	0.994	0.537	0.908	0.365	0.888	0.271	0.908	0.010
Source × Level	0.500	0.001	0.825	0.372	0.614	0.177	0.458	0.429	0.614	0.016
SEM	0.020	0.068	0.17	0.027	0.09	0.004	0.14	0.034	0.15	0.19

SEM = standard error of the mean.

ZMCGly = Zn, Mn, and Cu bis-glycinates.

ZMCAA = Zn, Mn, and Cu amino acid complexed minerals.

Low level = 20, 20, and 3.5 mg of Zn, Mn, and Cu, respectively.

High level = 40, 40, and 7 mg of Zn, Mn, and Cu, respectively.

^A,B Within a column, values with different letters differ significantly from source by Tukey’s test (P < 0.05).

¹Values were calculated based on the egg weight.