Este estudo teve como objetivo avaliar a eficiência dos antioxidantes ácido ascórbico, carvão ativado e polivinilpirrolidona (PVP) no enraizamento de miniestacas de quatro clones de Eucalyptus grandis x E. urophylla. As miniestacas foram coletadas em minijardim clonal desenvolvido em sistema de hidroponia em canaletas. Experimentalmente, foram testadas cinco concentrações de ácido ascórbico, quatro de carvão ativado e sete de PVP, nos quatro clones estudados. Foram realizadas avaliações quanto ao porcentual de enraizamento e crescimento das miniestacas enraizadas em casa de vegetação, casa de sombra e pleno sol. Concluiu-se que as respostas dos clones à aplicação dos antioxidantes ácido ascórbico, carvão ativado e PVP foram variadas e específicas, indicando efeito genotípico (clone) quanto às características avaliadas.
The objective of the present work was to evaluate the efficiency of the antioxidants ascorbic acid, activated carbon and polyvinylpyrrolidone (PVP) on the rooting of mini-cuttings of four clones of Eucalyptus grandis x E. urophylla. The mini-cuttings were collected in a mini-clonal hedge developed in a hydroponic system in small gutters. Experimentally, five concentrations of ascorbic acid, four concentrations of activated carbon and seven concentrations of PVP were tested, for the four clones studied. Evaluation of the rooting percentage and growth of the rooted mini-cuttings were made in a greenhouse, a shade house and in the open sun. The obtained results led to the conclusion that there's a strong correlation between the genotypic differences of the analyzed materials and the plants rooting and their survival success as a response to the use of antioxidants ascorbic acid, activated carbon and polyvinylpyrrolidone (PVP) on different clones.
