Table 2. Egg production performance of laying hens from week 38 to 40 fed diets containing different feed additives¹

Items	Dietary treatment²				SEM	P-value
Items	CON	YSAPB	APY	OGO	SEM	P-value
Egg production (%)
Day 7	86.90	98.21	94.05	88.69	2.519	0.390
Day 14	88.69	94.05	92.26	87.50	4.148	0.938
Day 1—14	87.80	96.13	93.15	88.10	2.338	0.526
Egg weight (g)
Day 7	62.05^b	59.22^a	60.93^ab	61.30^ab	0.342	0.047
Day 14	60.22^a	60.70^ab	60.03^a	61.64^b	0.164	0.009
Day 1—14	61.14	59.96	60.48	61.47	0.202	0.051
Feed conversion ratio (g/g)
Day 7	1.77^a	1.86^b	1.80^ab	1.79^ab	0.011	0.038
Day 14	1.83^b	1.81^ab	1.83^b	1.78^a	0.005	0.009
Day 1—14	1.80	1.84	1.82	1.79	0.007	0.065
Egg mass (g/d/bird)
Day 7	53.92	58.39	57.28	54.33	1.599	0.706
Day 14	53.39	57.00	55.42	53.85	2.458	0.953
Day 1—14	53.66	57.69	56.35	54.09	1.411	0.714

Values are mean of four replicates per treatment.
CON: Basal diet meets the recommended nutritional requirements for Hy-Line Brown; YSAPB: CON + 1 g/kg YSAPB; APY: CON + 1 g/kg APY; OGO: CON + 1 g/kg OGO.
Means in a row with different letters are significantly different (P<0.05).
SEM = standard error of mean.