Table 2. Effects of breed, laying age and egg storage period on the incubation time and the survival rate of chicks after hatching

Factors		Incubation time (h)	Survival rate from 1d to 7d (%)
Breed (A)	Jaeraejong	460.7±8.4^b	96.5±5.2^a
	K. Rhode	467.3±7.5^a	96.0±5.8^a
	K. Leghorn	468.2±7.8^a	86.4±9.1^b
Laying age (B)	27~29wk	465.3±8.4	90.4±9.8^b
Laying age (B)	50~52wk	465.6±8.9	95.5±5.4^a
Egg storage period (C)	3d	462.4±7.9^c	95.4±5.9
	7d	465.2±8.1^b	91.1±8.7
	14d	470.0±8.3^a	92.4±9.4
P values	A	<0001	<0001
	B	0.6432	0.0013
	C	<0001	0.0668
	A X B	0.5736	0.0293
	A X C	0.0568	0.5707
	B X C	0.4455	0.7962
	A X B X C	0.1579	0.7749

Values are mean±standard deviation.
The different superscripts within column in each factor significantly differ.