The general aim of this research was to evaluate as the sewage sludge (biosolids) modify C and N stocks in eucalypt plantation. The study was installed with application rates up to 40 t h-1 of dry matter biosolids in Eucalyptus grandis plantation. The eucalypts that received 10 t h-1 of biosolids presented even development that it received full mineral fertilizer, producing, on average, 107,5 t ha-1 of aboveground biomass, 63% the more than control. Those treatments also presented larger values of C and N contents in the biomass. The biosolids treated with lime, applied in surface, showed low decomposition rates and it didn’t contribute to increase C and N soil total stocks. The effect of residue on the development of trees is more important to supply input of organic material in system than own application.
Biosolids; Eucalyptus grandis; nutrients; carbon sink
