Table 2

			Treatments
	T₀	T₁	T₂	T₃	T₄	Prob.
Moult phase
Body weight (kg)
Day 0	1.79 ± 0.05	1.81 ± 0.04	1.82 ± 0.04	1.80 ± 0.04	1.75 ± 0.03	0.09NS
Day 14	1.78 ± 0.04^a	1.70 ± 0.03^b	1.69 ± 0.04^b	1.59 ± 0.03^c	1.50 ± 0.03c	0.00**
Body weight loss (%)	0.56 ± 0.06^c	6.03 ± 5.86^b	7.17 ± 5.72^b	11.93 ± 5.34^ab	14.81 ± 9.38^a	0.00**
Feed intake (g)	98.69 ± 1.04^a	77.29 ± 1.68^b	81.04 ± 0.66^b	72.64 ± 0.96^bc	64.54 ± 2.32^c	0.00**
Cessation of lay (day)	0.00 ± 0.00^d	9.29 ± 0.74^a	7.00 ± 0.52^b	5.27 ± 0.39^c	5.12 ± 6.51^c	0.00**
Post moult
Body weight (kg)
Day 0	1.78 ± 0.04	1.70 ± 0.03	1.69 ± 0.04	1.59 ± 0.03	1.45 ± 0.03	-
Day 14	1.83 ± 0.04	1.89 ± 0.04	1.87 ± 0.05	1.83 ± 0.02	1.85 ± 0.02	0.16NS
Body weight gain (%)	2.51 ± 0.13^d	10.04 ± 0.02^c	10.63 ± 0.21^c	15.07 ± 0.14^b	21.90a ± 0.41^a	0.00**
Feed intake (g/hen/day)	101.54 ± 2.10^b	104.32 ± 1.81^ab	107.28 ± 1.98^a	106.31 ± 3.91^a	108.81 ± 2.63^a	0.05*
FCR (g/g egg weight)	1.69 ± 0.03^a	1.63 ± 0.04^ab	1.54 ± 0.03^b	1.55 ± 0.02^b	1.60 ± 0.04^ab	0.02*
Hen-day production (%)	60.60 ± 4.08^c	77.79 ± 2.67^b	83.58 ± 1.07^a	79.32 ± 2.78^ab	80.92 ± 4.23^a	0.02*
Resumption of lay (days)	0.00 ± 0.00^d	4.54 ± 0.93^c	6.61 ± 1.21^c	9.89 ± 0.79^b	16.71 ± 1.13^a	0.00**

^a,b,c,d: 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 2: Effects of ZnO induced moult on performance of commercial layers.