Table 7.

Effects of Bacillus subtilis supplementation and dietary Ca levels on apparent retention of Ca and P (79 wk of age).¹

Items		Ca (g/day)	P (g/day)	Ca (%)	P (%)
Ca level (%)	B. subtilis level (CFU/kg)
3.5	0	1.78	0.21	39.34	30.62
	2 × 109	2.92	0.19	62.15	28.21
4	0	2.26	0.21	50.22	31.67
	2 × 109	3.75	0.23	69.89	33.17
4.5	0	3.19	0.22	58.26	32.77
	2 × 109	3.83	0.21	71.80	31.90
SEM		0.15	0.01	2.83	1.12
Means of main effects
Ca level (%)
3.5		2.35b	0.20	50.74b	29.42
4		3.01a	0.22	57.37a,b	32.42
4.5		3.51a	0.22	63.67a	32.33
B. subtilis level (CFU/kg)
0		2.41b	0.21	49.88b	31.69
2 × 109		3.50a	0.21	67.50a	31.09
P-value
Ca level		0.012	0.703	0.033	0.170
B. subtilis level		<0.001	0.789	<0.001	0.262
Ca level × B. subtilis level		0.212	0.834	0.479	0.871

^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 3 birds each.