. 2021 Dec 6;8:726770. doi: 10.3389/fnut.2021.726770

Table 8.

Effects of dietary Se sources on intestinal morphology of laying hens.

Items¹	Ctrl	Norm	SS	SEY	SEIP	SEM	P-value
Intestine index, ‰	33.15	33.28	34.35	34.32	31.51	2.09	0.87
Duodenum index, ‰	9.56	8.99	9.30	9.66	9.50	0.66	0.95
Jejunum index, ‰	13.15	13.45	14.74	12.89	11.37	1.06	0.30
Ileum index, ‰	9.04	12.53	10.31	11.76	9.67	1.06	0.88
Intestine length, mm	1,391.67	1,335.83	1,340.33	1,336.50	1,380.33	55.51	0.92
Duodenum length, mm	120.67	119.83	125.67	120.67	119.33	6.90	0.97
Jejunum length, mm	691.33	634.67	654.33	609.33	709.33	31.89	0.20
Ileum length, mm	579.67	581.33	560.33	606.50	551.67	32.33	0.78
VH, μm	1,011.34	1,049.49	959.77	1,065.56	1,127.93	55.19	0.31
CD, μm	197.33^a	214.24^a	159.06^b	199.87^a	165.53^b	10.27	<0.01
V/C	5.15^c	5.00^c	6.09^ab	5.35^bc	6.84^a	0.31	<0.01

^{a, b, c}

Means within a row with no common superscripts differ significantly (P <0.05).

Data are the mean of eight replicates; The organ index was calculated as organ weight/ Live body weight. VH, villus height of jejunum; CD, crypt depth of jejunum; V/C, the ratio of VH to CD of jejunum; SEM, standard error of mean; Ctrl, the birds fed the basal diet; Norm, the birds fed 0.3 mg/kg of Se provided by sodium selenite; SS, SEY, and SEIP, the birds fed 2 mg/kg of Se provided by sodium selenite, Se yeast, and Se-enriched insect protein powder, respectively.