Table 6. Effect of dietary Fe concentration and source on small intestinal morphology of weanling pigs (d 28)

Item	Inorganic (ppm)	HME (ppm)			Organic (ppm)	SEM	p-value
Item	100	50	75	100	100	SEM	p-value
Duodenum
Villus height (VH; μm)	449^ab	430^b	436^ab	459^a	444^ab	7.30	0.025
Crypt depth (GD; μm)	237	233	231	223	229	3.75	0.856
VH/CD	1.87	1.86	1.86	2.06	1.95	0.03	0.481
Jejunum
Villus height (μm)	357^ab	344^b	359^ab	371^a	364^ab	7.11	0.045
Crypt depth (μm)	237	233	223	226	221	4.65	0.515
VH/CD	1.51	1.49	1.61	1.64	1.73	0.03	0.282
Ileum
Villus height (μm)	239	229	247	253	238	3.82	0.347
Crypt depth (μm)	142	140	146	141	142	1.66	0.455
VH/CD	1.64	1.65	1.69	1.79	1.75	0.02	0.335

Values with different superscripts of the row significantly differ (p < 0.05).
HME, hot melt extrusion; SEM, standard error of means..