Table 4.

Egg quality of commercial layers into 2 phases from 23 to 31 wk and 32 to 40 wk.

Groups1	Egg weight, g		Shell weight, mm		Shell thickness, mm
	23 to 31 wk	32 to 40 wk	23 to 31 wk	32 to 40 wk	23 to 31 wk	32 to 40 wk
Control	51.5	54.7	10.3	10.25	0.382	0.363
T1	51.9	56.2	9.7	10.25	0.37	0.368
T2	50.5	55.1	10.5	10.15	0.388	0.362
T3	49.9	53.07	10.4	9.15	0.393	0.328
T4	52	55.05	10.2	10.2	0.393	0.365
SEM	0.32	0.374	0.13	0.177	0.0048	0.006
P-value	0.138	0.126	0.284	0.077	0.534	0.118

SEM = standard error of mean.

¹Control = 0.33% non phytate phosphorus (NPP); T1 = 0.24% NPP + 250 FTU/kg laboratory produced phytase; T2 = 0.24% NPP + 250 FTU/kg commercial phytase; T3 = 0.16% NPP + 500 FTU/kg laboratory produced phytase; T4 = 0.16% NPP + 500 FTU/kg commercial phytase.