Enraizamento de miniestacas de clones híbridos de Eucalyptus globulus

Abstract

The objective of this study was to evaluate the effect of the growth regulator indol butiric acid (IBA) on the rooting of apical and intermediate mini-cuttings of Eucalyptus urophylla x E. globulus and Eucalyptus grandis x E. globulus clones. The mini-cutting rooting was carried out for 30 days in acclimatized greenhouse and after the cuttings were transferred to shade house, where they remained for 10 days. The experimental design was in random blocks with a triple factorial arrangement constituted by two types of mini-cuttings (apical and intermediate), three IBA concentrations (0, 2000 and 4000 mg L-1) and eleven clones, in three repetitions, composed of 12 mini-cuttings per repetition. The IBA did not affect the characteristics evaluated. The survival and rooting of apical mini-cuttings were significantly higher. There was significant difference among clones regarding the evaluated variables, except for survival after 30 days in greenhouse.