Table 3 Performance of 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

ADFI, g

EP, %

EW, g

EM, g

FCR, g/g

FCR, g/dozen eggs

IM

105

73.6*

67.9*

50.0*

2.075*

1.671*

AACM70

105

76.7*

67.9

52.0

2.012

1.645

AACM50

104

78.6*

68.1

53.1*

1.967

1.607

AACM40

103

80.8*

69.1*

55.3*

1.868*

1.555*

MEAN

104

77.1

68.3

52.6

1.960

1.610

SEM

0.37

0.78

0.17

0.57

0.0161

0.0122

  

P-values

 

Dunnett

0.154

0.022

0.026

0.004

0.001

0.023

Linear1

0.054

0.044

0.011

0.014

< 0.001

< 0.001

Quadratic1

0.674

0.801

0.275

0.605

0.403

0.722

  1. ADFI = average daily feed intake; EP = egg production; FCR = feed conversion ratio for egg mass; FCRD = feed conversion for dozen eggs; SEM = standard error of the mean.
  2. IM = 60, 60, 7, 40, 0.2, and 2 mg/kg of Zn, Mn, Cu, Fe, Se, and I, respectively;
  3. AACM70 = 42.0, 42.0, 4.9, 28, 0.14, and 1.4 mg/kg of Zn, Mn, Cu, Fe, Se, and I, respectively;
  4. AACM50 = 30, 30, 3.5, 20, 0.10, and 1 mg/kg of Zn, Mn, Cu, Fe, Se, and I, respectively;
  5. 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.
Back to article page