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Comparative effects of inorganic and organic selenium sources (selenium yeast) on selenium status of lactating cows



Comparative effects of inorganic and organic selenium sources (selenium yeast) on selenium status of lactating cows



Biotechnology in the feed industry: Proceedings of Alltech' s Eleventh Annual Symposium: 271-281



Two selenium (Se) sources, sodium selenite and Se yeast, were fed as topdress feeds at a rate of 2.2 mg Se/head per day to 2 groups of lactating Holstein cows on a commercial NE Pennsylvania, USA, dairy farm for 90 days. Forages and commercial feed mixtures were low in Se. Within the treatment, whole blood- and serum Se concentrations increased during the trial (final vs. initial). Cattle supplemented with Se yeast had higher serum Se concentrations at the end of the trial.

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