Propagação vegetativa de Eucalyptus cloeziana F. Muell. por estaquia e miniestaquia

• Autor(a) principal: Almeida, Fernanda Daniele de
• Data de Publicação: 2006
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3181
• topic: Silvicultura clonal; Propagação de plantas; Clonagem; Eucalipto; Eucalyptus cloeziana; Vegetative propagation; Eucalyptus; Clones; Eucalyptus cloeziana; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::SILVICULTURA

The present work aimed at: a) evaluating rooting efficiency of adventitious cuttings made from shoots obtained through tree severance, stem ringing and epicormical shoot induction on pruned branches of selected Eucalyptus cloeziana trees; b) evaluating efficiency of growth regulators IBA and NAA in adventitious rooting of minicuttings of Eucalyptus cloeziana clones; c) evaluating efficiency of co-factors PVP and phloroglucinol in adventitious rooting of minicuttings of Eucalyptus cloeziana clones. To obtain shoots through tree severance, 3 and 5 matrices, respectively 5 and 15 years old, were selected. Stem ringing was realized in trees of 5, 15 and 20 years old and branches were cut of trees of 20 years old. To evaluate the growth regulators and co-factors, E. cloeziana clones, originating from the CAF miniclonal hedge, were used. Evaluations verified the efficiency of the root induction methods, survival of the cuttings/minicuttings on leaving greenhouse, rooting on leaving the shade house, survival and height of the cuttings at the age of 90 days, submitted to treatments with growth regulators and co- actors. In the experiment, which evaluated different forms of epicormical shoot induction, all methods were successful at shoot induction. However, only cuttings made of stump shoots resulted in adventitious rooting. Evaluation of the effect of growth regulators IBA and NAA on the rooting of minicuttings showed that clones with the highest rooting potential responded better at adventitious rooting at lowest IBA doses, independent of regulator appliance forms used (liquid or powder). Use of the growth regulator NAA showed no influence on rooting with the majority of the clones studied. In relation to co-factors phloroglucinol and PVP can be concluded that both showed beneficial effects for the majority of the characteristics analysed for the two clones of E. cloeziana. In a general way, based on the objectives of this work, on the applied treatments and on the genetic material used, the obtained results indicate rooting potential of minicuttings techniques of the E. cloeziana clones studied, permitting their clonal propagation in a satisfactory way.