Absorption of Copper from Oxisols by Brachiaria decumbens Roots

摘要

Brachiaria decumbens is a type of grass largely used in Brazil for cattle pastures. Copper-rich cattle manures are usually applied to Oxisols for pasture fertilization. The application of this type of effluent may increase copper concentration in thesoil which can cause changes in the geochemical characteristics of the soil, and some of the changes may be harmful to the environment. Thus avoiding high copper concentrations in the soil is desired. This study was designed to evaluate the potential ofBrachiaria decumbens roots to absorb copper in Oxisols.