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Table 2 Performance of Isa Brown layers reared on three different management systems

From: Performance and cost-benefit analysis of Isa Brown layers on different management systems

Parameters

Battery cage

Deep litter

Free range

p value

Initial weight (kg)

1.73 ± 0.02

1.71 ± 0.03

1.70 ± 0.01

0.73

Final weight (kg)

1.63 ± 0.06

1.61 ± 0.02

1.54 ± 0.02

0.185

Weight gain (kg)

0.10 ± 0.07

0.10 ± 0.05

0.16 ± 0.02

0.518

%Weight gain

5.78 ± 3.77

5.84 ± 2.74

9.41 ± 1.05

0.428

Egg weight (g)

59.50 ± 2.5

58.15 ± 2.16

55.78 ± 1.01

0.432

Average egg/day

22.14 ± 0.71

22.95 ± 0.78

21.52 ± 1.39

0.69

%Hen day production

73.79 ± 2.37

76.51 ± 2.60

71.74 ± 4.64

0.691

Egg mass index

43.91 ± 3.07

44.45 ± 0.82

40.01 ± 2.27

0.285

Daily feed intake (g)

114.83 ± 0.17a

114.00 ± 0.52a

109.67 ± 0.42b

˂ 0.001

Total feed intake (g)

7463.95 ± 1.2a

7410.00 ± 3.2a

7128.55 ± 2.2b

˂ 0.001

Feed conversion ratio

1.93 ± 0.08

1.96 ± 0.08

1.97 ± 0.03

0.945

Cannibalism

3.00 ± 0.40

1.00 ± 0.00

0.00 ± 0.00

˂ 0.001

Mortality

4.00 ± 0.40

1.00 ± 0.00

2.00 ± 0.40

˂ 0.001

  1. a,bMeans within the same row with different superscripts are significantly different (P < 0.05)