Metodologia para resgate de matrizes e enraizamento de estacas de Eremanthus erythropappus

Abstract

Due to the important ecological function of Eremanthus erythropappus (candeia) wood, combined with the growing demand for its products, studies are being made to develop its silviculture. Among these studies, it is important and strategic to start with the cloning process due to the need for improvement of the stand quality that are to be planted. The initial step toward this goal was to define a methodology for rescue of stock plants and rooting of the species cuttings. As a way to rescue the stock plants, 24 trees aged six years of a candeia stand were severed at 15, 30, 45 and 60 cm in height above ground. In 12 trees, it was proceeded soil scarification. The counting and harvesting of sprouts were performed 65 and 135 days after cut, respectively. From the shoots obtained, three types of cuttings were prepared: Top 1, Top 2 and Basal, which were treated with IBA at concentrations of 0, 200, 400, 800 or 1600 mg kg-1 and placed in a greenhouse for rooting. Based on the results, it was conclude that cut, independent of the height, followed by soil scarification and the rooting of cuttings prepared from the shoots collected in the roots, is an effective method for rescue of stock plants and rooting of candeia cuttings and the highest percentage of rooting was found in the Top1 cuttings and did not vary in function of AIB concentration.