Table 4.

The small intestine absolute weight, relative weight to BW, length, and ratio of weight to length because of dietary supplementation of different doses of riboflavin and Bacillus subtilis on day 13 of Ross 708 male broilers.

Riboflavin	Bacillus	Weight (g)			Relative weight to BW (%)			Length (cm)			Relative weight (g/cm)
		Duo	Jej	Ile	Duo	Jej	Ile	Duo	Jej	Ile	Duo	Jej	Ile
0.75		5.92	8.80	5.20	1.80	2.71	1.58	21.52	42.40	40.98	0.274	0.211	0.129
6.6		5.88	8.84	5.35	1.75	2.67	1.62	21.50	42.22	40.51	0.274	0.208	0.134
20		5.90	8.96	5.49	1.80	2.74	1.69	21.69	43.43	41.30	0.273	0.210	0.134
SEM		0.130	0.234	0.120	0.038	0.072	0.049	0.288	0.797	0.577	0.0054	0.0065	0.0042
	No	5.88	8.76	5.23	1.77	2.68	1.58	21.53	41.71b	40.42	0.275	0.209	0.131
	Yes	5.92	8.98	5.47	1.80	2.73	1.67	21.61	43.66a	41.45	0.273	0.210	0.133
	SEM	0.106	0.191	0.098	0.031	0.059	0.040	0.235	0.651	0.471	0.0044	0.0053	0.0034
Riboflavin × Bacillus
0.75	No	5.80	8.59	5.05	1.80	2.71	1.55	21.03b	41.99	40.56	0.268	0.207	0.131
0.75	Yes	6.04	9.02	5.36	1.81	2.70	1.61	22.01a,b	42.81	41.41	0.279	0.214	0.127
6.6	No	5.90	8.67	5.33	1.75	2.63	1.62	21.34a,b	41.11	39.78	0.280	0.208	0.133
6.6	Yes	5.86	9.01	5.37	1.75	2.70	1.61	21.66a,b	43.34	41.24	0.268	0.208	0.135
20	No	5.94	9.01	5.30	1.77	2.69	1.57	22.22a	42.01	40.91	0.276	0.211	0.130
20	Yes	5.86	8.91	5.68	1.83	2.78	1.80	21.16a,b	44.84	41.70	0.271	0.208	0.138
SEM		0.184	0.330	0.169	0.053	0.102	0.069	0.407	1.126	0.815	0.0077	0.0092	0.0059
P-value
Riboflavin		0.978	0.884	0.263	0.513	0.783	0.320	0.878	0.529	0.622	0.993	0.952	0.650
Bacillus		0.781	0.413	0.085	0.541	0.530	0.114	0.806	0.037	0.126	0.725	0.898	0.721
Riboflavin × Bacillus		0.636	0.697	0.559	0.868	0.885	0.184	0.048	0.657	0.905	0.322	0.851	0.600

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

Abbreviations: Duo, duodenum; Ile, ileum; Jej, jejunum.