Eficiência das auxinas (AIB e ANA) no enraizamento de miniestacas de clones de Eucalyptus cloeziana F. Muell

n The present work aimed to evaluate the efficiency of the auxins IBA (indolbutyric acid) and NAA (naphtaleneacetic acid) on the adventitious rooting of Eucalyptus cloeziana clones. Minicuttings originated from seven Eucalyptus cloeziana clones established in mini-clonal hedge, were evaluated for the effects of IBA (0, 1500, 3000 and 6000 mg L -1 ) in the liquid and powder forms and NAA (0, 3000 and 6000 mg L -1 ) in the liquid form. The results showed that minicutting is a viable technique for vegetative propagation of the studied Eucalyptus cloeziana clones, with overall high rooting rates. Clones with higher adventitious rooting potential gave better response to lower IBA doses, while clones with reduced rooting potential were more efficient with higher doses, independently of the form of the applied phytoregulator (powder or liquid). NAA, in general, had no significant effect on minicutting rooting for most studied clones.