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Retained Placenta of Holstein Cows Treated with Selenium and Vitamin E¹

Department of Animal Science, North Carolina A&T State University, Greensboro 27411

H. L. Dalton and M. D. Whitacre³

North Carolina Agricultural Extension Service, Greensboro 27420
Extension Dairy Husbandry, North Carolina State University, Raleigh 27650

ABSTRACT

An injection of 50 mg of selenium as selenite in combination with 680 IU of vitamin E as -tocopherol acetate was administered approximately 20 days prepartum to Holstein cows in four North Carolina herds within Guilford and Alamance Counties in an attempt to reduce the incidence of retained placenta. This was reduced in cows considered borderline deficient of selenium concentration in serum prior to supplementation, but the incidence was not reduced by treatment in cows considered adequate or extremely deficient in selenium prior to supplementation. Serum selenium for cows in each herd was elevated by supplementation.

¹ Publication approved by the Director of Research Administration, North Carolina A&T State University, Greensboro 27411. Work was supported by SEA/CR Grant No. NC-X-005-5-79-120-1.

² Virginia Agricultural Extension Service, Charlottesville 22901.

³ School of Veterinary Medicine, North Carolina State University, Raleigh 27650.