Table 5.

Intestinal morphology histology of weaned piglets with different VA concentrations¹

	Dietary VA, mg/kg						Contrast, P <
Items2	2	4	8	16	SEM	Model P value	Linear	Quadratic
VH, μm
Jejunum	343.83	357.08	311.39	327.14	7.262	0.027	0.133	0.062
Ileum	321.08	300.98	319.27	316.19	6.156	0.312	0.949	0.505
CD, μm
Jejunum	257.05	262.00	245.63	240.20	5.664	0.335	0.202	0.654
Ileum	222.36	241.61	240.19	219.78	4.786	0.185	0.828	0.043
VW, μm
Jejunum	136.74	140.72	138.49	138.58	1.928	0.522	0.855	0.633
Ileum	130.54	132.74	134.83	130.41	1.620	0.299	0.911	0.330
VH:CD, μm:μm
Jejunum	1.36	1.38	1.28	1.38	0.036	0.366	0.870	0.586
Ileum	1.45	1.26	1.34	1.44	0.031	0.025	0.828	0.015
VSA, μm
Jejunum	147484.54	157421.48	135795.17	142154.11	3568.284	0.035	0.232	0.063
Ileum	131501.77	125264.26	135438.62	129994.09	3085.549	0.469	0.844	0.951

¹Values are expressed as mean ± SEM, n = 8.