PROPAGAÇÃO VEGETATIVA DE Eucalyptus benthamii EM LEITO DE AREIA MEDIADO POR FITORREGULADOR

Abstract

In Brazil species of Eucalyptus have great prominence in forestry, due to its economic importance, adaptability, diversity and rapid growth. Among the few species of Eucalyptus that have suitability for cultivation of Brazil. With frequent frosts and low temperatures in winter. There is species of Eucalyptus, the E. benthamii which is an option for plantations in various Brazilian regions. Although the literature is incipient, scarce, which relates to the obtaining of clonal seedlings, which gets even tougher when we focus on recommended species for subtropical regions. Given the above, the present research was divided into two studies where the first chapter, presents a general objective. In this time, we evaluate the emission of shoots in E. benthamii’s ministumps treated with different doses of growth phytoregulator BAP being the treatments: 0, 2,5; 5,0, 7,5, and 10,0 mg. L-1. It was still checked in this chapter the survival of ministumps after successive applications of the regulator. In the second chapter the aim of the study was to evaluate the rooting of cuttings from the ministumps treated with different dosages of the regulator. To check its influence on production of clonal seedlings. In the first study it was found the positive influence of the regulators application, where the dose 7.5 mg L-1 BAP, tested in the treatment 4. This treat promoted the largest increase in the number of shoots, and also improved survival in ministumps. To second study presented a greater survival of cuttings at all stages analyzed, greenhouse, shade and full sun, also in the dosage 7.5 mg L1 BAP. However, this same dosage did not influence significantly the emission of adventitious roots in cuttings.