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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

ParametersBattery cageDeep litterFree rangep value
Initial weight (kg)1.73 ± 0.021.71 ± 0.031.70 ± 0.010.73
Final weight (kg)1.63 ± 0.061.61 ± 0.021.54 ± 0.020.185
Weight gain (kg)0.10 ± 0.070.10 ± 0.050.16 ± 0.020.518
%Weight gain5.78 ± 3.775.84 ± 2.749.41 ± 1.050.428
Egg weight (g)59.50 ± 2.558.15 ± 2.1655.78 ± 1.010.432
Average egg/day22.14 ± 0.7122.95 ± 0.7821.52 ± 1.390.69
%Hen day production73.79 ± 2.3776.51 ± 2.6071.74 ± 4.640.691
Egg mass index43.91 ± 3.0744.45 ± 0.8240.01 ± 2.270.285
Daily feed intake (g)114.83 ± 0.17a114.00 ± 0.52a109.67 ± 0.42b˂ 0.001
Total feed intake (g)7463.95 ± 1.2a7410.00 ± 3.2a7128.55 ± 2.2b˂ 0.001
Feed conversion ratio1.93 ± 0.081.96 ± 0.081.97 ± 0.030.945
Cannibalism3.00 ± 0.401.00 ± 0.000.00 ± 0.00˂ 0.001
Mortality4.00 ± 0.401.00 ± 0.002.00 ± 0.40˂ 0.001
  1. a,bMeans within the same row with different superscripts are significantly different (P < 0.05)