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| Volume 105(2) 2005, pages: 15-22. | | Ilse Gräber, Jørgen F. Hansen, Svend E. Olesen, Jens Petersen, Hans S. Østergaard & Lars Krogh: | Accumulation of Copper and Zinc in Danish Agricultural Soils in Intensive Pig Production Areas | | The change of Cu and Zn concentrations in Danish agricultural
soils was studied in areas with intensive pig production. Cu and Zn
are found in pig manure as the metals are added to pig feed as
growth promoters. The changes in concentrations of total and 0.02
M EDTA extractable Cu and Zn in soils from 1986 to 1998 were determined
from samples taken at two depths (0-25 cm and 25-50 cm)
from 73 sites. Pig manure and mineral fertilizer was added to 60
sites whereas fertilizer only was used on 13 sites. During the survey
period soil Cu concentrations increased in both depths but mostly
in the sites where pig manure was added. Furthermore, the results
indicated that some plant-available Cu and Zn were transported
from the topsoil to the subsoil. No significant change in soil Zn concentration
was found although a slight reduction was observed.
Comparing soil metal concentrations observed in 1998 to the total
pig manure application in a 12-year period, it was observed that
application of manure caused an accumulation of Cu and of Zn in
the upper 50 cm soil. The accumulation rates correspond to the Cu
and Zn concentrations in the pig manure. | | >> download as pdf |
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