Table 5.

Effects of Bacillus subtilis supplementation and dietary Ca levels on shell ratio and eggshell weight.¹

Items		Shell ratio (%)		Eggshell weight (g)
		75 wk	79 wk	75 wk	79 wk
Ca level (%)	B. subtilis level (CFU/kg)
3.5	0	9.56	9.61	6.23	6.25
	2 × 109	9.55	9.70	6.18	6.36
4	0	9.62	9.74	6.27	6.37
	2 × 109	9.65	9.90	6.39	6.49
4.5	0	9.69	9.73	6.30	6.38
	2 × 109	9.70	9.79	6.31	6.44
SEM		0.21	0.03	0.03	0.02
Means of main effects
Ca level (%)
3.5		9.56	9.66b	6.21	6.31b
4		9.64	9.81a	6.33	6.43a
4.5		9.70	9.75a,b	6.31	6.41a,b
B. subtilis level (CFU/kg)
0		9.63	9.70b	6.27	6.33b
2 × 109		9.63	9.78a	6.31	6.43a
P-value
Ca level		0.321	0.047	0.222	0.044
B. subtilis level		0.901	0.049	0.673	0.023
Ca level × B. subtilis level		0.982	0.634	0.470	0.862

^a,bMeans assigned different superscripts within a factor of analysis (Ca level, B. subtilis level, and their interactions) differ, P < 0.05.

¹Data are the mean of 8 replicates with 18 eggs each.