EFFECT OF 2,2',5,5'-TETRACHLOROBIPHENYL, BENZO-A-PYREN, CADMIUM AND COPPER IN AN ORIGINAL SEWAGE FIELD SOIL AND UPTAKE OF THESE SUBSTANCES BY RYE

Rye was cultivated in pots on weakly polluted sewage field soil (R) an d artificially polluted variants of this soil. The aim of the project was to study the combined effect of organic pollutants (PCB, PAH) and heavy metals (HM) to parameters of soil biology, biomass production an d soil-plant transfer. R was contaminated with 2,2',5,5'-tetrachlorobi phenyl (PCB 52), benzo-a-pyren (BaP), cadmium (Cd) or copper (Cu) as w ell as with combinations of thesesubstrtnces up to concentrations comp arable with an extremely polluted sewage field soil. Rye showed signif icant yield reductions on all treatments enriched with copper (> 60 pp m plant-available Cu in soil). In this context copper only produced th e impairments of microbial activity in the soil and caused its phytoto xicity. The yield reductions were connected with higher copper content s and also higher cadmium contents of rye as a result of concentration effect. Added copper led to increasing mobility and availability for plants of Cd in the soil. Addition of copper in combination with organ ic pollutants to soil R increased also availability of Cd for plants.