Table 7. Influence of various milk by-products levels in weaning pig diet on morphology of small intestine diameter in weaning pigs¹⁾

Criteria	Treatments2)				SEM	p-value
	NM	LM	MM	HM		Linear	Quadratic
Weaning phase 1 (2 weeks) (μm)
Proximal of small intestine
Villus height	225.21	220.61	242.93	184.00	18.012	0.699	0.623
Crypt depth	281.38	283.90	280.45	270.84	20.019	0.901	0.905
Villus:Crypt	0.83	0.77	0.87	0.70	0.043	0.649	0.745
Medium of small intestine
Villus height	252.43	258.28	245.76	261.85	10.810	0.937	0.928
Crypt depth	251.30	237.72	212.67	281.86	19.440	0.864	0.463
Villus:Crypt	1.04	1.10	1.17	1.30	0.068	0.885	0.643
Distal of small intestine
Villus height	224.96	273.43	256.27	282.67	14.209	0.339	0.708
Crypt depth	229.45	258.29	251.29	259.30	20.197	0.721	0.841
Villus:Crypt	1.07	1.14	1.04	1.08	0.066	0.902	0.842
Weaning phase 2 (5 weeks) (μm)
Proximal of small intestine
Villus height	337.66	292.49	321.31	304.75	8.917	0.432	0.351
Crypt depth	512.10	488.36	441.12	446.20	13.901	0.091	0.910
Villus:Crypt	0.67	0.60	0.73	0.68	0.025	0.452	0.570
Medium of small intestine
Villus height	310.27	328.73	324.22	317.85	12.365	0.871	0.703
Crypt depth	379.89	389.46	350.52	344.15	10.717	0.201	0.513
Villus:Crypt	0.83	0.85	0.83	0.93	0.035	0.203	0.942
Distal of small intestine
Villus height	283.34	281.46	307.78	290.05	6.556	0.411	0.876
Crypt depth	375.13	375.93	349.90	338.92	8.704	0.109	0.467
Villus:Crypt	0.75	0.75	0.88	0.87	0.027	0.085	0.651

Least squares means of 3 observations per treatment.
NM, almost no milk by-products, 5% / 0%; LM, lower milk by-products, 10% / 5%; MM, middle milk by-products, 20% / 10%; HM, high milk by-products, 30% / 15%.