Table 6. Effects of dietary selenium sources and levels on blood biochemistry of growing-finishing pigs¹⁾

Item2)	Dietary treatments					SEM	p-value
	CON	ISe3	ISe5	OSe3	OSe5		Diet	Source	Level	Source × Level
Grower (day 49)
Total protein (g/dL)	7.06	6.38	6.15	6.80	7.18	0.44	0.446	0.123	0.868	0.509
Calcium (mg/dL)	11.51	9.57	9.69	10.28	10.84	0.77	0.391	0.247	0.666	0.779
Inorganic phosphorus (mg/dL)	11.51	9.84	9.59	10.21	10.90	0.82	0.470	0.318	0.793	0.575
Magnesium (mg/dL)	2.84	2.33	2.29	2.50	2.65	0.18	0.228	0.160	0.761	0.613
Total cholesterol (mg/dL)	94.88	78.63	80.50	91.75	95.38	9.01	0.544	0.141	0.764	0.924
Triglyceride (mg/dL)	56.63	32.63	45.50	68.00	45.63	10.59	0.231	0.114	0.660	0.117
Glucose (mg/dL)	76.50	55.50	58.50	59.00	56.50	12.26	0.736	0.952	0.984	0.826
Albumin (g/dL)	3.86	3.54	3.36	3.51	3.76	0.23	0.564	0.429	0.873	0.372
Creatinine (mg/dL)	1.45	1.34	1.16	1.28	1.35	0.10	0.408	0.551	0.633	0.242
BUN (mg/dL)	10.58	9.00	7.86	10.08	10.32	1.01	0.331	0.099	0.662	0.504
AST (IU/L)	49.00	44.25	43.25	50.13	50.00	10.27	0.979	0.548	0.957	0.967
ALT (IU/L)	68.75	47.63	43.50	61.25	48.38	10.33	0.410	0.385	0.423	0.678
IGF-1 (pg/mL)	118.56	141.54	124.70	126.54	147.93	21.69	0.858	0.852	0.918	0.392
Finisher (day 98)
Total protein (g/dL)	6.56	6.50	5.41	6.51	5.58	0.37	0.098	0.815	0.015	0.841
Calcium (mg/dL)	9.74	9.36	7.70	9.11	8.11	0.47	0.036	0.864	0.012	0.490
Inorganic phosphorus (mg/dL)	8.21	7.88	6.45	7.70	6.84	0.35	0.014	0.767	0.005	0.436
Magnesium (mg/dL)	1.89	1.83	1.53	1.88	1.55	0.10	0.043	0.714	0.007	0.903
Total cholesterol (mg/dL)	89.88	88.50	81.38	93.63	77.50	6.15	0.374	0.920	0.078	0.476
Triglyceride (mg/dL)	49.13	32.63	32.50	52.75	32.00	6.76	0.106	0.167	0.143	0.148
Glucose (mg/dL)	77.75	74.75	73.75	80.00	75.50	6.98	0.969	0.624	0.699	0.806
Albumin (g/dL)	3.79	3.91	3.34	3.59	3.29	0.23	0.263	0.419	0.072	0.552
Creatinine (mg/dL)	1.31	1.38	1.04	1.24	1.01	0.10	0.091	0.447	0.016	0.597
BUN (mg/dL)	9.49	7.95	7.30	8.06	7.35	0.87	0.417	0.926	0.443	0.972
AST (IU/L)	28.88	24.75	21.00	29.38	22.13	3.55	0.368	0.430	0.142	0.629
ALT (IU/L)	40.00	44.88	41.25	47.38	40.38	5.55	0.850	0.886	0.354	0.765
IGF-1 (pg/mL)	120.48	148.39	132.36	129.12	137.73	18.08	0.854	0.706	0.840	0.506

Each value is the mean of 4 replicates (1 pig/pen).
CON, a non-selenium-fortified diet based on corn and soybean meal; ISe3, CON + 0.3 ppm inorganic selenium; ISe5, CON + 0.5 ppm inorganic selenium; OSe3, CON + 0.3 organic selenium; OSe5, CON + 0.5 ppm organic selenium; Diet, all dietary treatments; Source, inorganic or organic; Level, 0.3 or 0.5 ppm; BUN, blood urea nitrogen; AST, aspartate aminotransferase; ALT, alanine aminotransferase; IGF-1, insulin-like growth factor-1.