Table 5.

Tibia weight, tibia length, Seedor index, tibia strength, ash, calcium (ca), phosphorus (P), and ca: P ratio of laying hens fed different sources and levels of Zn, Mn, Cu, Fe, Se, and I from 78 to 98 weeks of age.

Treatments	Tibia weight	Tibia length	Seedor Index	Tibia strength	Ashes (g)	Ashes (%)	Ca (mg/kg)	P (mg/kg)	Ca: P ratio
	(mg)	(mm)		(N)
IM	7727	114	68.2	259	2.56	34.3	176	79.9	2.21
AACM70	7621	114	70.7	284	2.64	35.2	169	75.8	2.23
AACM50	8127	113	71.8	306	2.74	34.9	195	87.4	2.23
AACM40	8229	114	72.1	276	2.73	34.0	156	69.3	2.26
Average	7918	114	70.7	281	2.66	34.6	174	77.9	2.23
SEM	102.2	0.28	0.74	9.3	0.049	0.47	6.4	3.01	0.007
P-values
Dunnett	0.092	0.718	0.201	0.331	0.580	0.822	0.192	0.177	0.124
Linear1	0.149	0.472	0.073	0.072	0.520	0.393	0.364	0.333	0.172
Quadratic1	0.201	0.710	0.691	0.919	0.683	0.818	0.052	0.053	0.435

SEM = standard error of the mean.

IM = 60, 60, 7, 40, 0.2, and 2 mg/kg of Zn, Mn, Cu, Fe, Se, and I, respectively;

AACM70 = 42.0, 42.0, 4.9, 28, 0.14, and 1.4 mg/kg of Zn, Mn, Cu, Fe, Se, and I, respectively;

AACM50 = 30, 30, 3.5, 20, 0.10, and 1 mg/kg of Zn, Mn, Cu, Fe, Se, and I, respectively;

AACM40 = 24, 24, 2.8, 16, 0.08, and 0.80 of Zn, Mn, Cu, Fe, Se, and I, respectively¹. Orthogonal polynomial contrast.