Table 3.

The relative internal organ weight to BW (%) of Ross 708 male broilers fed riboflavin and Bacillus subtilis diet on day 13.

Riboflavin	Bacillus	Relative weight/BW %
		Proventriculus	Gizzard	Spleen	Pancreas	Liver	Bursa	Heart
0.75		0.692	3.50	0.075	0.487	3.65	0.169	0.698
6.6		0.694	3.27	0.077	0.450	3.68	0.158	0.733
20		0.725	3.39	0.077	0.506	3.67	0.162	0.708
SEM		0.0124	0.052	0.0026	0.0121	0.071	0.0070	0.0185
	No	0.706	3.50	0.078	0.472	3.67	0.157	0.705
	Yes	0.702	3.27	0.075	0.490	3.66	0.169	0.722
	SEM	0.0101	3.39	0.0021	0.0099	0.058	0.0057	0.0151
Riboflavin × Bacillus
0.75	No	0.707	3.62a	0.077	0.499a	3.65	0.160	0.700
0.75	Yes	0.677	3.38b	0.073	0.475a	3.64	0.179	0.697
6.6	No	0.682	3.26b	0.078	0.417b	3.70	0.151	0.730
6.6	Yes	0.707	3.28b	0.075	0.483a	3.66	0.166	0.736
20	No	0.729	3.31b	0.078	0.501a	3.67	0.162	0.685
20	Yes	0.721	3.47a,b	0.077	0.512a	3.67	0.161	0.732
SEM		0.0176	3.386	0.0037	0.0171	0.100	0.0099	0.0262
P-value
Riboflavin		0.114	0.009	0.788	0.006	0.954	0.513	0.393
Bacillus		0.748	0.735	0.379	0.210	0.844	0.171	0.433
Riboflavin × Bacillus		0.300	0.025	0.917	0.036	0.972	0.567	0.601

^a-cMeans in a column not sharing a common superscript were different (P < 0.05).