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Selenium supplementation of gestating beef cows on selenium deficient pastures comparison of injectable selenium to 120 ppm selenium salt mineral mixture


Selenium supplementation of gestating beef cows on selenium deficient pastures comparison of injectable selenium to 120 ppm selenium salt mineral mixture



Agri-Practice 12(2): 25-30



Soils and crops in many regions of the United States contain limited amounts of selenium resulting in marginal to deficient concentrations of Se in feedstuffs. Selenium supplementation has prevented or minimized Se-responsive disorders. A study was conducted to determine a practical, effective, and safe Se supplementation program for gestating beef cows and neonatal calves raised on Se-deficient pastures. The study compared the efficacy of a single dose of injectable Se during midgestation with a Se-fortified salt-mineral mixture in repleting Se-deficient beef cows and their newborn calves. A single, midgestation Se injection was used to correspond to the weaning/pregnancy diagnosis period when cow/calf producers handle their cows. The study also compared parenteral Se supplementation at birth of calves from Se-deficient dams with Se status of calves from Se-adequate dams. The effect of Se supplementation on calf birth weights and 60-day weight gains was measured.

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