Concetration and speciation of copper in leachate from sloped vineyard soil

Bakar se u vinogradarstvu učestalo koristi za zaštitu vinove loze od gljivičnih oboljenja. Kvaliteta tla i procjedne vode usko je povezana, a mjere koje se primjenjuju na površini tla odražavaju se i na kvalitetu procjedne vode. Stoga je u ovome radu određena koncentracija i specijacija bakra u procjednoj vodi vinogradskog padinskog tla na pokušalištu Jazbina u Zagrebu. Rezultati su pokazali statistički značajno povećanje koncentracije bakra u procjednoj vodi uzorkovanoj iz lizimetara na dnu padine u odnosu na vrh i sredinu padine, između kojih nije bilo značajne razlike, što upućuje na mobilnost bakra niz padinu vinogradskog padinskog tla. Kemijska specijacija bakra u procjednoj vodi pokazala je da je najzastupljeniji oblik bakra bio kompleks bakra s otopljenim organskim ugljikom (Cu-DOC), koji je imao > 98,9 % udjela u ukupnoj koncentraciji bakra u procjednoj vodi, neovisno o tomu radi li se o vrhu, sredini ili dnu padine.Copper is frequently used in viticulture for the protection of vineyards from fungal diseases. The quality of soil and leachate (i.e., percolation water) is closely connected, and agricultural treatments applied at the soil surface are reflected on percolation water quality. Therefore, in this study, the concentration and speciation of copper in percolation water from sloped vineyard soil at the Jazbina experimental station in Zagreb was determined. Results showed statistically significant increase of copper concentration in leachate from the bottom of the slope compared to leachate from the top and the middle of the slope, between which no significant difference was found. Data suggest that copper in sloped vineyard soil migrates downward the slope. Chemical speciation showed that the majority of copper was found as copper complexed with dissolved organic carbon (Cu-DOC), with > 98,9% of total copper concentration in percolated water, regardless of the position on the slope