Abstract
To obtain a better knowledge basis for the correct supply of Cu to sheep in Norway, a systematic, countrywide investigation of element composition of pasture plants was conducted, with emphasis on natural pastures. Samples of pasture grass, herbs, willow shrub leaves and bilberry (N = 575) from 142 locations were analysed for Cu, Mo, S and Fe. A large geographical variation was observed for Mo concentration and Cu:Mo ratio, a somewhat smaller variation for Fe, while Cu and S concentrations showed limited geographical variation. The Mo variation led to a Cu:Mo ratio <2 in 2% of the samples and >20 in 62% of samples, confirming that the trace element composition of Norwegian sheep pastures may represent a risk of Cu deficiency as well as Cu overload, depending on location. A considerable botanical variation was also observed, in particular for Cu and Mo.
Published Version
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Schedule a callMore From: Acta Agriculturae Scandinavica, Section A — Animal Science
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