Treatments      
Parameters (%) T0 T1 T2 T3 T4 Prob.
Live¬† weight (kg) 1.70 ± 0.12 1.83 ± 0.17 1.70 ± 0.06 1.65 ± 0.08 1.68 ± 0.13 0.88NS
Ovary 1.95 ± 0.04ab 1.86 ± 0.27ab 1.57 ± 0.32b 2.69 ± 0.27a 2.77 ± 0.50a 0.05*
Kidney 0.10 ± 0.00c 0.11 ± 0.01bc 0.19 ± 0.01a 0.12 ± 0.01bc 0.14 ± 0.12b 0.00**
Heart 0.43 ± 0.02 0.42. ± 0.05 0.44 ± 0.01 0.42 ± 0.03 0.42 ± 0.00 0.03NS
Lung 0.38 ± 0.08 0.41 ± 0.03 0.36 ± 0.01 0.45 ± 0.04 0.36 ± 0.07 0.67NS
Liver 2.35 ± 0.10b ¬†2.40 ± 0.29b 3.16 ± 0.05a 2.04 ± 0.14b 2.22 ± 0.05b 0.00*
Gizzard 2.84 ± 0.02 2.78 ± 0.05 2.59 ± 0.01 22.64 ± 0.19 2.71 ± 0.16 0.54NS
a,b: means on the same row with different superscripts are significant at 5% or 1%
NS: not-significant; *= P<0.05; ** P<0.01; Prob.-Probability
Table 3: Effect of ZnO moult on organ characteristics of laying hens.