The efficacy of selenium dioxide as a selenium supplement for dairy cattle.
The efficacy of selenium dioxide (SeO2) was similar to sodium selenate (Na2SeO4 x 10H2O), in terms of increasing and maintaining blood Se concentrations, when administered orally twice daily to give 0.64 mg of Se/day to grazing dairy cows for 55 days.
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AgResearch Grasslands, Private Bag 11-008, Palmerston North, New Zealand.
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