Šrejbrová P., Šoch M., Lukešová D.
Abstract
The aim of the study was
to determine mutual relations between copper and zinc in blood plasma of cows,
heifers, ewes and lambs from operations in mountainous and submontane regions of
the Šumava. Blood analysis showed that mean blood plasma concentrations of both
micro-elements in cattle decreased over the monitoring period to the lower
threshold of reference values (Cu to 12.08 ?mol.l-1 and Zn to 12.58 ?mol.l-1).
In sheep, mean blood plasma zinc concentrations were at the lower limit of
reference values or slightly above it (9.56 – 12.16 ?mol.l-1). Statistical
relations showed that of the two elements, copper probably has the dominant
position. In sheep, this may be due to the fact that they are generally more
sensitive to higher copper intakes in feed rations than other farm animals. Low
blood plasma concentrations of copper and zinc in the animals studied were
probably caused by the undersupply of the two elements in feed rations due to
their deficiency in the region monitored. Farmers were recommended to use
suitable feed supplement products
Key words:
micro-elements,
cooper, zinc, blood plasma, cattle, sheep, Šumava mountains