SciELO - Scientific Electronic Library Online

 
vol.66 issue3Recovery of degraded areas revegeted with Acacia mangium and Eucalyptus with special reference to organic matter humificationSewage sludge application on cultivated soils: effects on runoff and trace metal load author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Scientia Agricola

Print version ISSN 0103-9016

Abstract

VALLADARES, Gustavo Souza; CAMARGO, Otávio Antônio de; CARVALHO, José Ruy Porto de  and  SILVA, Alessandra Maria Cia. Assessment of heavy metals in soils of a vineyard region with the use of principal component analysis. Sci. agric. (Piracicaba, Braz.) [online]. 2009, vol.66, n.3, pp. 361-367. ISSN 0103-9016.  http://dx.doi.org/10.1590/S0103-90162009000300011.

Agricultural management with chemicals may contaminate the soil with heavy metals. The objective of this study was to apply Principal Component Analysis and geoprocessing techniques to identify the origin of the metals Cu, Fe, Mn, Zn, Ni, Pb, Cr and Cd as potential contaminants of agricultural soils. The study was developed in an area of vineyard cultivation in the State of São Paulo, Brazil. Soil samples were collected and GPS located under different uses and coverings. The metal concentrations in the soils were determined using the DTPA method. The Cu and Zn content was considered high in most of the samples, and was larger in the areas cultivated with vineyards that had been under the application of fungicides for several decades. The concentrations of Cu and Zn were correlated. The geoprocessing techniques and the Principal Component Analysis confirmed the enrichment of the soil with Cu and Zn because of the use and management of the vineyards with chemicals in the preceding decades.

Keywords : PCA; GIS; soil pollution; copper; zinc.

        · abstract in Portuguese     · text in English     · pdf in English