RESUMO Este trabalho teve como objetivo o enraizamento de miniestacas de material juvenil da preciosa (Aniba canelilla (H.B.K) Mez), tratadas com diferentes concentrações de ácido indol-3-butirico (AIB) na forma líquida. As miniestacas foram obtidas de mudas de regeneração natural com aproximadamente um ano de idade e modeladas com 5 cm de comprimento e 0,4 -0,6 mm de diâmetro. cinco tratamentos (0, 300 ppm, 600 ppm, 1200 ppm e 2000 ppm de AIB) com 25 miniestacas/tratamento, totalizando 125 miniestacas no experimento. Após 180 dias do plantio, as miniestacas foram retiradas do substrato e avaliados os seguintes parâmetros: porcentagem de enraizamento, porcentagem de sobrevivência, porcentagem de calo; porcentagem de brotos; número de raízes principais, comprimento médio das raízes; peso da matéria seca dos brotos e peso da matéria seca das raízes. Os resultados indicam que a emissão de raízes das estacas de material juvenil da preciosa independe do uso do AIB. Entretanto, o uso desta auxina na concentração de 2000 ppm estimulou o enraizamento (79,04 %); sobrevivência (89,43%) e brotação (64%) das miniestacas. PALAVRAS-CHAVE: preciosa , auxinas, material juvenil, miniestacas Vegetative propagation by mini-cuttings of preciosa (Aniba canelilla (H.B.K) Mez) ABSTRACT This study aimed to the rooting of minicuttings of juvenile material of preciosa (Aniba canelilla (H.B.K) Mez), through the use of concentrations of 0, 300 ppm, 600 ppm, 1200 ppm and 2000 ppm of acid indole-3-butirico (IBA) in liquid form. The cuttings were obtained from seedlings of natural regeneration with approximately one years of age and shaped with 5 cm long and 0.4 -0.6 mm in diameter. The experiment was conducted in a greenhouse, with intermittent mist system governed by 20 seconds to mist at intervals of 20 minutes. As substrate was used sand washed. Weekly applications were made from fertilizer and foliar fungicide. The design used was completely randomized with five treatments and twenty-five repetitions, totaling 125 minicuttings. After 180 days after planting, the minicuttings were taken from the substrate and evaluated the following parameters: percentage of rooting, percentage of survival, percentage of calluses, dry weight of the sprouts, number, size and dry weight of roots. The results indicate that the rooting of minicuttings of juvenile material of preciosa independent of the use of the IBA. However, the use of auxin in the concentration of 2000 ppm stimulated rooting (79.04%), survival (89.43%) and sprouted (64%) of minicuttings.