Table 4.

Effects of dietary selenium levels and sources on selenium tissue concentration of 17-d-old broiler chickens*

Selenium source1	Selenium levels, mg/kg					Means	SEM2	P-value
	0.0	0.08	0.16	0.24	0.32			Source	Level	S X L3	L4	Q5
Liver, mg/kg
Means	1.55	1.47	1.41	1.37	1.33		0.06	0.288	0.504	0.185	0.074	0.764
SS	1.41	1.50	1.50	1.54	1.44	1.47					0.790	0.600
SY	1.69 A	1.45 AB	1.36 AB	1.18 B	1.24 AB	1.38					0.006	0.343
Breast muscle, mg/kg
Means	0.296	0.279	0.278	0.292	0.267		0.08	0.311	0.516	0.501	0.293	0.999
SS	0.307	0.258	0.272	0.292	0.253	0.277					0.214	0.700
SY	0.285	0.299	0.284	0.293	0.281	0.288					0.811	0.700

^* Values represented on a dry matter basis

¹ SS sodium selenite, SY selenium enriched-yeast

² Standard error of means

³ Interactive effects between selenium and trace minerals sources and selenium levels

⁴ Linear effect of supplementation selenium levels

⁵ Quadratic effect of supplementation selenium levels

^A-B Different uppercase letters in the same line are different by Tukey test at 5%