engleski

Factors controlling trace metals behaviour in the salinized floodplain soils

This paper investigate the spatial variability of soil salinization and trace metals in the floodplain soils of the Neretva River valley (Croatia). Within this area, between the main channel of the Neretva, lateral canals and the Adriatic Sea, there are about 5000 ha of irrigated agricultural land. In order to identify the spatial variability of soil salinity and trace metal distribution in the surface layer (0-25 cm), topsoil samples were collected from 135 locations using a systematic sampling on a 700-m grid. Electrical conductivity as well as sodium and chloride concentrations measured in the saturated soil extract show high variability of soil salinity level. The trace metal contents do not exceed threshold value established by the Croatian government regulation with exception of copper. The results suggest that relationship between topography, salinity level and soil organic matter content affects trace metal distribution in floodplain soils in the estuary of Neretva River.

estuary; heavy metals; sediments; soil degradation; soil salinization

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