Abstract Copper damages plants when present in high concentrations in the soil. This study assessed the growth and tolerance of Eucalyptus grandis, E. saligna, E. dunnii, and Corymbia citriodora seedlings in soil contaminated by copper. The experimental design was completely randomized in a factorial scheme (4 × 6), with four eucalyptus species and six copper doses (0, 80, 160, 240, 320, 400 mg kg-1) with eight replications. The experiment was performed in a greenhouse for 120 days. The height, stem diameter, root dry mass and shoot dry mass, root specific surface area, Dickson quality index, and tolerance index were assessed. The results showed that the morphological parameters of the studied eucalyptus species were reduced by the copper doses added in the soil. However, the Corymbia citriodora and the Eucalyptus saligna species had a higher tolerance index to the metal.

RESUMO Este trabalho avaliou a utilização de turfa como amenizante e Eucalyptus grandis como técnica de fitoestabilização para remediar solo contaminado com cobre. O trabalho foi conduzido sob delineamento inteiramente casualizado em arranjo fatorial (2 × 6), sendo sem e com adição de turfa (200 mL L-1 de solo) e seis doses de cobre adicionadas ao solo (0 mg kg-1, 60 mg kg-1, 120 mg kg-1, 180 mg kg-1, 240 mg kg-1, 300 mg kg-1 de solo), com seis repetições. Avaliaram-se a altura das mudas, o diâmetro do colo, a massa seca radicular e aérea, a área superficial específica, os teores e a quantidade acumulada de cobre no sistema radicular e na parte aérea e o índice de translocação. A adição de turfa possibilitou efeito amenizante da contaminação por cobre e favoreceu o crescimento das mudas. As mudas de Eucalyptus grandis apresentam elevado acúmulo de cobre nas raízes, o que permite indicá-la como promissora para fins de fitoestabilização de solos contaminados com cobre.

ABSTRACT This work aimed to use peat as ameliorating and Eucalyptus grandis for the phytostabilization technique for remediation of a contaminated soil with copper. The work was conducted under completely randomized design in a factorial arrangement (2 × 6), with and without addition of peat (200 mL L-1 of soil) and six doses of copper (0 (Zero), 60, 120, 180, 240, 300 mg kg-1 of soil), with six replications. Evaluations consisted of seedling height, stem diameter, shoots and roots dry weight, specific surface area, copper concentrations and accumulation in roots and shoots and translocation index. Peat addition showed an ameliorating effect on soil contaminated with copper and higher seedlings growth. Eucalyptus grandis seedlings showed higher copper accumulation in roots, and with characteristics may indicate this species for phytostabilization of soils contaminated with copper.

RESUMO O objetivo do estudo foi avaliar o efeito da vermicompostagem de resíduos de carne e esterco bovino no desenvolvimento de mudas de eucalipto e pinus. O experimento foi conduzido em delineamento inteiramente casualizado com oito tratamentos, sendo quatro elaborados a partir da adição de 0%, 20%, 40% e 60% de esterco bovino ao resíduo de carne, ambos vermicompostados, e quatro constituídos pela adição de 0%, 20%, 40% e 60% de vermicomposto ao substrato comercial, com sete repetições. Foram avaliados a altura das mudas, o diâmetro do colo, a massa seca da parte aérea e radicular, a área superficial específica, o índice de qualidade de Dickson e a relação entre a altura da muda e o diâmetro do colo. A adição ao substrato comercial de 20% e 40% de vermicomposto proporciona desenvolvimento e qualidade de mudas de eucalipto equivalentes ao alcançado com a utilização de 100% de substrato comercial. As mudas de pinus não são favorecidas pelas proporções de vermicomposto testadas.

ABSTRACT The objective of this study was to evaluate the effect of meat waste and cattle manure vermicomposting in the development of eucalyptus and Pinus seedlings. The experiment was conducted in a completely randomized design with eight treatments with seven repetitions. The treatments were: 0%, 20%, 40% and 60% of cattle manure added to meat waste, both vermicomposted, and 0%, 20%, 40% and 60% of the vermicompost added to commercial substrate. Stem height and diameter, shoot and root dry mass, specific surface area, Dickson quality index and the ratio between stem height and diameter were assessed. Addition of 20% and 40% of vermicompost in eucalyptus seedling cultivation promotes similar development and quality obtained with addition of 100% of commercial substrate. Pinus seedlings are not influenced by the proportions of vermicompost tested.