DEVELOPMENT OF CEDRO-ROSA SEEDLINGS IN SOIL CONTAMINATED BY COPPER: TOLERANCE AND THE POTENTIAL FOR SOIL PHYTOSTABILIZATION PROPOSAL

Agricultural, industrial and mining activities are the mainly factors related to soil contamination, as well the reuse of urban and/or animal residues. These activities can produce heavy metals accumulation in soils, which are potentially dangerous chemical elements to environmental quality and to well-being of living beings. Phytoremediation is a technology for rehabilitation of degraded areas which aims the soil decontamination. Forest species can immobilize and export to outside of the system larger amounts of chemical elements from contaminated soil, because they have high biomass production. The objective of this study was to evaluate the Cedrela fissilis development in contaminated soil by heavy metals. With this propose, seedlings were cultivated in greenhouse and in a contaminated soil by Cu (0, 60, 80, 100, 500 mg kg(-1)) for 105 days. After this period some soil and plant parameters were evaluated. Seedlings of C. fissilis presented crescent increments of dry matter until 100 mg kg-1 of Cu, with reduction of vegetal development in the high doses. In general, it was verified high partition of dry matter to root system than aerial part. Plant Cu contents were correlated with applied doses in the soil. The root bioconcentraction factor of C. fissilis indicates potential capacity of this tree specie to phytostabilization works in contaminated soils.