Table 2.

Effects of monobutyrin supplementation on production and egg quality of broiler breeders.

Item	CG	BY	SEM	P value
Egg production rate%	65.29	68.51	1.449	0.15
Feed:egg, g/g	2.89	2.79	0.077	0.35
Egg weight, g	48.73	50.74	0.614	0.043
Egg breaking rate, %	0.87	0.36	0.185	0.07
Egg shape index	1.32	1.32	0.007	0.71
Shell breaking strength, kg/cm2	3.76	4.01	0.128	0.21
Shell thickness, mm	0.36	0.36	0.005	0.91

Abbreviations: BY, monobutyrin group; CG, control group.