Table 5.

Effects of dietary treatments on intestinal morphology.

Item		Duodenum			Jejunum			Ileum
		VH, μm	CD, μm	VH:CD	VH, μm	CD, μm	VH:CD	VH, μm	CD, μm	VH:CD
Organic acid, g/kg	Fiber source1
0	No fiber	1,384	233	6.1	1,060abc	188	5.8	536	130	4.0
	SF	1,240	215	6.3	843bc	192	4.4	569	130	4.3
	IF	1,472	207	7.3	780c	188	4.3	603	171	3.9
1	No fiber	1,228	229	5.3	1,009abc	191	5.5	664	127	5.2
	SF	1,512	230	6.8	1,088ab	169	5.0	465	119	4.1
	IF	1,485	246	6.3	1,190a	230	4.7	582	162	3.5
Organic acid, g/kg
0		1,365	219	6.6	894b	189	4.8	569	136	4.0
1		1,408	235	6.1	1,096a	196	5.0	570	144	4.3
Fiber source
No fiber		1,306b	231	5.7	1,034	189	5.6	600	129b	4.6
SF		1,376ab	223	6.5	966	180	4.7	517	124b	4.2
IF		1,479a	227	6.8	985	209	4.5	592	166a	3.7
Pooled SEM		142.57	20.02	0.22	95.50	31.51	0.23	100.01	6.11	0.22
P-value
Organic acid		0.433	0.207	0.295	0.001	0.669	0.645	0.984	0.446	0.604
Fiber source		0.047	0.859	0.094	0.602	0.380	0.119	0.460	0.007	0.227
Organic acid × fiber source		0.112	0.403	0.240	0.009	0.297	0.728	0.289	0.948	0.223

SF = soluble fiber; IF = insoluble fiber; VH = villus height; CD = crypt depth.

^{a, b, c} Values in the same column not sharing a common superscript differ significantly (P < 0.05).

¹Rice hull as IF or sugar beet pulp as SF was supplemented at 30 g/kg to replace silica sand in the basal diet.