C. GIL 1, J. RAMOS-MIRAS 1, R. BOLUDA 2*
1 Departamento de Edafología y Química Agrícola. Universidad
de Almería. La Cañada de San
Urbano. Almería. [email protected].
2 Departament de Biologia Vegetal. Universitat de València, CIDE (CSIC-UV-GV).
Camí de la
Marjal, s/n. 46470 ALBAL (València).
*Correspondencia.
Abstract: Total concentration of Cu, Zn and Co of natural soils and greenhouse soils from western Almería (Spain) has been determined. It was established the baseline concentrations, background levels and reference values. These were, respectively, the followings (mg Kg-1): Cu 5-25, 13-14 and 23-25; Zn 29-394, 139-155 and 281-394; Co 8-22, 14 and 20-22 for natural soils. The baseline concentration and reference value for greenhouse soils were respectively: Cu 9-58 and 58; Zn 49-301 and 301; and Co 1123 and 23. Results shows that average concentrations of this heavy metals are, generally, similar than it was found in agricultural soils by other authors. Only 3.7% of the greenhouse soils are contaminated. Although the use of background levels criteria shows a great content of heavy metals in soils related with anthropogenic activity due 91% of greenhouses soils have greater content of Cu than the referenced by the background, 74% for Co and 29% for Zn. Moreover, the 25% of greenhouse soils are greater than twice the background value for Cu. All of this, with the zone and greenhouses characteristics, shows that the main gate of these elements to greenhouse Almería soils is the use of fertilizers and pesticides due intensive agricultural practices that they submit it.
Key words: Total contents, heavy metals, baseline concentrations, soils.