Long-Term Supplementation of Laying Hen Diets with Various Selenium Sources as a Method for the Fortification of Eggs with Selenium

Table 2

Scheme of selenium supplementation.

Kind of Se source	Level of supplemented Se (mg/kg)	Amounts of added supplement (mg/kg)
Control	—	—
Sodium selenite	0.3	30
Selenium-enriched yeast	0.3	867
Selenomethionine	0.3	744

Amounts of added supplements to achieve 0.3 mg Se/kg; Se content in yeast: 346 mg/kg; Se content in Se-Met: 403 mg/kg; Se content in Na-selenite: 10 g/kg (as premix).