Table 8.

Alpha diversity of jejunal mucosa-associated microbiota at the family and genus level in nursery pigs fed diets with increasing levels of xylanase

Item	Xylanase, XU per kg feed					SEM	P-value
	0	220	440	880	1,760		Linear	Quad1	0 vs. Xyl2
Family level
Chao1	69.33	70.67	71.67	81.48	76.17	9.89	0.346	0.395	0.463
Shannon	4.08	3.52	4.17	3.70	3.89	0.55	0.905	0.755	0.546
Simpson	0.87	0.77	0.88	0.78	0.84	0.07	0.943	0.496	0.474
Genus level
Chao1	78.17	71.17	81.83	85.19	80.50	11.05	0.587	0.546	0.873
Shannon	3.99	3.37	4.04	3.54	3.68	0.56	0.752	0.751	0.466
Simpson	0.83	0.74	0.86	0.75	0.81	0.08	0.907	0.652	0.564

Quadratic.

Xylanase (220 + 440 + 880 + 1,760 XU per kg feed).