The relationship between daily Se intakes and blood Se concentrations
in pregnant dairy cows
N.D. Grace, A.R. Mills, A.F. Death
AgResearch, Grasslands, Private Bag 11008, Palmerston North, New
Zealand
Proceedings of the New Zealand Society of Animal Production. 1995,
55: 174-175
Three groups of pregnant (3rd trimester) cows grazing low Se pastures
were given daily Se intakes of 0.44, 0.94 and 1.44mg respectively as pasture
plus a drench. A significant relationship between blood Se concentration
(nmol/l) [y] and daily Se intakes (mg/day) [x] was described by the equation
Y=147(44.0+(359(42.1)X***. Given that a mean blood Se concentration of
250 nmol/l reflects an adequate Se status, that is there is no production
response to Se supplementation, then the daily Se intake of pregnant cows
was determined to be 0.29mg or pasture should contain 0.037mg Se/kg DM
to prevent Se deficiency.
Keywords: NZSAPAB;
dairy cows; selenium; blood; intake
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Last Updated 25-01-1997
