Table 5.

Effect of glycerol tributyrate on hatchability of broiler breeders with different egg-laying rate.¹

Item		Embryonic mortality, %	Fertility, %	Hatchability of set eggs, %	Health chicken rate, %
Laying	TRI
AR	−	8.12	95.47	88.95	88.23
AR	+	7.98	96.34	89.55	88.60
LR	−	8.49	95.22	89.45	89.44
LR	+	8.34	97.40	89.11	89.48
SEM		2.14	1.51	2.65	2.78
P-value		0.87	0.94	0.96	0.94
P-value
Laying		0.97	0.81	0.83	0.77
TRI		0.98	0.64	0.87	0.69
Laying × TRI		0.63	0.74	0.64	0.73

Abbreviations: AR, average egg laying rate; LR, low egg laying rate; TRI, 1,000 mg/kg tributyrin.

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