Eucalyptus oil and Pisolithus microcarpus in the growth of bracatinga in soil contaminated by copper/ Oleo de eucalipto e Pisolithus microcarpus no crescimento de bracatinga em solo contaminado por cobre

The copper mining areas may present elevated quantity available of this nutrient in the soil affecting the plant development. The objective of this research was to evaluate the effect of eucalyptus essential oil in the association of ectomycorrhizal with Pisolithus microcarpus fungus in bracatinga seedlings and its behavior in soil contaminated by copper. The experiment was conducted in a completely randomized delineation in a factorial arrangement (4 x 5), four types of inoculation (control, oil, fungus and oil + fungus) and five doses of copper (natural soil level, 60, 120, 180 and 240 mg of Cu [kg.sup.-1] soil) were used with five repetitions. Plant height (cm), root collar diameter (mm), dry mass of shoot and root (g), root length (cm), specific surface area ([cm.sup.2]), and ratio of height/diameter of the collar and Dickson quality index were evaluated. It was verified that use of 40 µL [L.sup.-1] of eucalyptus essential oil increases the bracatinga seedlings height in soil with addition 180 mg of Cu [kg.sup.-1] soil. There is no effect of Pisolithus microcarpus inoculation in growth of bracatinga seedlings in soil contaminated with copper. The dose of copper reduces dry mass of shoot and root of seedlings.