Copper and selenium supplementation of ewes grazing on pastures low in copper and selenium: Effect on reproduction and concent s

Author: F.E. van Niekerk and C.H. van Niekerk
Year: 1990
Issue: 4
Volume: 20
Page: 246 - 249

Influence of copper and selenium supplementation in SA Mutton Merino ewes, kept on pastures with low copper and selenium concentrations, was investigated. Ewes which came into oestrus and conceived during March to April, were found to have concentrations of plasma copper of 60 to 80 μg /dl. Inadequate copper intake by ewes during late pregnancy resulted in decreased concentrations of plasma copper, thereby leading to low concentrations of copper in the liver of young lambs. Selenium supplementation of ewes grazing pastures with a selenium content of 0,03 – 0,09 μg Se/g DM, has been found to raise concentrations of blood selenium but had no effect on the concentrations of selenium in the liver and kidneys of young lambs.




Keywords: Blood selenium, copper supplementation, fertility, plasma copper, pregnancy, selenium supplementation
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