Table 4.

Organ index of weaned piglets with different VA concentrations¹

	Dietary VA, mg/kg						Contrast, P <
Items2	2	4	8	16	SEM	Model P value	Linear	Quadratic
Liver
Total weight, g	211.00	216.44	224.00	225.81	3.917	0.609	0.154	0.821
Relative weight, g/kg	20.33	20.63	20.78	21.20	0.191	0.216	0.121	0.887
Spleen
Total weight, g	23.88	26.81	25.81	23.94	0.792	0.140	0.910	0.143
Relative weight, g/kg	2.31	2.55	2.38	2.25	0.065	0.144	0.530	0.154
Both kidneys
Total weight, g	55.94	58.31	59.00	56.86	0.958	0.165	0.702	0.261
Relative weight, g/kg	5.42	5.56	5.53	5.55	0.097	0.237	0.706	0.763
Small intestine
Total length, m	9.24	9.23	9.61	9.68	0.112	0.177	0.099	0.846
Relative length, m/kg	0.90	0.88	0.90	0.91	0.015	0.539	0.773	0.645

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

²Relative weight = the ratio of total weight to BW of 14 d old; relative length = the ratio of total length to BW of 14 d old.