Table 5.

Effect of APO on hatchability of broiler breeders with different egg laying rates.

Item1		Fertility, %	Hatchability of set eggs, %	Health chicken rate, %	Embryonic mortality, %
Laying	APO
AR	−	96.29	87.69	87.58	8.49
AR	+	96.25	86.88	86.25	4.38
LR	−	97.10	89.52	89.66	7.55
LR	+	94.48	88.51	88.51	7.04
SEM		1.64	2.83	2.67	2.41
P-value		0.7	0.90	0.81	0.95
Main effect
Laying	AR	96.24	87.30	86.89	6.97
	LR	95.79	89.05	89.06	7.31
APO	−	96.76	88.69	88.69	8.07
	+	95.37	87.69	87.38	5.71
SEM		1.16	2.01	1.90	2.71
P-value
Laying		0.79	0.55	0.46	0.64
APO		0.41	0.73	0.63	0.8
Laying∗APO		0.43	0.97	0.94	0.94

Abbreviations: APO, 200 mg/kg apple pectic oligosaccharide; AR, average egg laying rate; LR, low egg laying rate.

¹Each mean represents 8 layers/replicate, 8 replicates/treatment.