Table 4 Egg quality from white laying hens fed different sources and levels of Zn, Mn, Cu, Fe, Se, and I from 78 to 98 weeks of age.

From: Levels of substitution of inorganic mineral to amino acids complexed minerals on old laying hens

Treatments

AH, mm

ST, mm

A, %

Y, %

S, %

Haught unit

Color

IM

8.20

0.407*

60.8

27.4

9.31*

88.5

5.19

AACM70

8.42

0.410

61.4

26.7

9.14*

89.6

5.20

AACM50

8.56

0.419

61.5

27.4

9.31

90.4

5.15

AACM40

8.38

0.424*

61.5

26.8

9.13*

89.2

5.16

MEAN

8.39

0.415

61.3

27.1

9.31

89.4

5.18

SEM

0.05

0.0021

0.12

0.11

0.032

0.28

0.023

  

P-values

  

Dunnett

0.082

0.005

0.070

0.065

0.052

0.092

0.872

Linear1

0.716

0.003

0.919

0.642

0.863

0.504

0.520

Quadratic1

0.120

0.623

0.964

0.039

0.020

0.071

0.648

  1. AH = albumen height; ST = eggshell thickness; A = albumen; Y = yolk; S = eggshell.
  2. SEM = standard error of the mean.
  3. IM = 60, 60, 7, 40, 0.2, and 2 mg/kg of Zn, Mn, Cu, Fe, Se, and I, respectively;
  4. AACM70 = 42.0, 42.0, 4.9, 28, 0.14, and 1.4 mg/kg of Zn, Mn, Cu, Fe, Se, and I, respectively;
  5. AACM50 = 30, 30, 3.5, 20, 0.10, and 1 mg/kg of Zn, Mn, Cu, Fe, Se, and I, respectively;
  6. AACM40 = 24, 24, 2.8, 16, 0.08, and 0.80 of Zn, Mn, Cu, Fe, Se, and I, respectively1. Orthogonal polynomial contrast; *Within a column differ significantly (P < 0.05) according to Dunnett’s test, which compares AACM levels with the IM control group.
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