engleski

Olive groves soil geochemistry of the island Brač

A pedo-geochemical survey was carried out in olive groves of the island Brač. The island of Brač, located in the central part of the Adriatic Sea, is part of the central Dalmatian island group. The complex pedological structure of the island is caused by a great variability of its karst features. The objective of this study is to determine geochemical soil composition (multielemental analysis) of major soil types (anthropogenically modified lithosol, terra rossa-rhodic cambisol and rendzic leptosol) on which the olive trees are cultivated. Topsoil (0-30 cm) and subsoil (30- 60 cm) samples were collected from 7 locations and their basic chemical and physical properties were determined. Multielemental composition (total content of more than 40 major, trace and rare earth elements) were determined by using High Resolution Inductively Coupled Plasma Mass Spectrometry after microwave digestion of soil samples with mixture of mineral acids. Additionally, concentrations of several important soluble plant-available elements were determined in topsoil samples and compared with total soil element content. Obtained results should demonstrate how different soil types of the studied olive growing region differ in pedological and geochemical composition. Such differences should be one of the mayor factors causing differences in olive oil multielemental composition and consequently one of the principal ways for establishing the olive oil geographic traceability

multielemental soil composition, plant-available elements, lithosol, terra rossa, leptosol, karst

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