APLICAÇÃO DE AIB E TIPO DE MINIESTACAS NA PRODUÇÃO DE MUDAS DE <i>Handroanthus heptaphyllus</i> Mattos

Abstract

RESUMOO objetivo deste trabalho foi avaliar o efeito do tipo de miniestacas e a necessidade de aplicação de ácido indolbutírico sobre o enraizamento e qualidade das mudas formadas de Handroanthus heptaphyllus. As miniestacas apicais e intermediárias foram obtidas em minijardim multiclonal formado a partir de sementes. As miniestacas foram preparadas com 5 cm de comprimento, um par de folhas reduzidas a 50% da área foliar e estaqueadas sem e com AIB na concentração de 8000 mg L -1 . As avaliações foram realizadas aos 30 dias, na expedição do setor de enraizamento e aos 120 dias, quando a muda se encontrava formada. O experimento foi conduzido em delineamento inteiramente casualizado, em esquema fatorial 3 x 2 x 2 (três épocas de coleta, duas concentrações de AIB e duas posições do propágulo), com quatro repetições, sendo 12 miniestacas por repetição. De acordo com os resultados, o AIB não foi necessário para o enraizamento das miniestacas, entretanto, sua utilização promove incremento do número e comprimento de raízes. As miniestacas intermediárias proporcionaram maior massa seca de raízes aos 30 dias após o estaqueamento, e aos 120 dias, maior número de folhas e de raízes. A época de coleta influenciou a qualidade final das mudas. Aquelas produzidas na última coleta (oitavo) apresentaram valores médios inferiores nas características biométricas, exceto para o comprimento e número de raízes de primeira ordem. Palavras-chave: miniestacas; ipê-roxo; propagação vegetativa. ABSTRACTThe objective of this study was to evaluate the effect of type of cuttings and the need for application of IBA on rooting and quality of the seedlings formed Handroanthus heptaphyllus. The apical and intermediate cuttings were obtained in multiclonal minigarden formed from seeds. The cuttings were prepared with 5 cm length, a pair of leaves reduced to 50% of leaf area without staked and IBA at a concentration of 8000 mg L -1 . Evaluations were performed at 30 days, the expedition rooting sector and at 120 days, when the change was in formed. The experiment was conducted in a completely randomized design in a factorial 3 x 2 x 2 (three sampling times, two concentrations of IBA and two positions of propagules), with four replications, with 12 cuttings per replicate. According to the results, the IBA was not necessary for the rooting of the shoots, however, their use promotes an increase in the number and length of roots. The intermediate cuttings showed

MINI-CUTTING TECHNIQUE FOR VEGETATIVE PROPAGATION OF Paratecoma peroba

“…P. peroba can propagate vegetatively by the mini-cutting technique, with satisfactory porcentages of survival and rooting, and crucial variables, and considered as the most important in the study of mini-cutting technique. The S (%) and R (%) of the P. peroba mini-cuttings were similar to other species of the family Bignoniaceae such as Handroanthus heptaphyllus (Freitas et al, 2016) and Tecoma stans (Biondi et al, 2008), which showed greater than 80% survival and 50% rooting of mini-cuttings. The hypothesis that the substrate influences on the rooting of the P. peroba mini-cuttings was also confirmed.…”

“…The types of mini-cutting did not influence the rooting of Handroanthus heptaphyllus (Freitas et al, 2016) and Toona ciliata (Ferreira et al, 2012). Yet, in Anadenanthera macrocarpa (Dias et al, 2015), Melaleuca alternifolia (Oliveira et al, 2012), and Peltophorum dubium (Mantovani et al, 2017) apical mini-cuttings were superior for rooting.…”

“…Brenan (Dias et al, 2015), Handroanthus heptaphyllus (Vell.) Mattos (Freitas et al, 2016), Plathymenia foliolosa Benth. (Pessanha et al, 2018), Tibouchina selowiana (Cham.)…”

Enraizamento de miniestacas em diferentes épocas de coleta para a seleção de clones de canjerana

“…A miniestaquia também possibilita a formação de um banco de matrizes em casa de vegetação, que fornecem material diversificado para produção de mudas, visando à conservação da espécie e possibilitando a seleção daquelas com as melhores características para serem utilizadas na produção comercial de mudas (Oliveira et al, 2016).…”

CONTROLLED RELEASE FERTILIZER IN THE ROOTING AND PERFORMANCE OF CLONES OF Paratecoma peroba

“…Among the methods of plant cloning is the minicuttings, a technique widely used to propagate clones of Eucalyptus species in Brazil, being characterized as one of the main factors, which contributed to the revolution of the country's clonal forestry on a commercial scale (Azevedo et al, 2015;Batista et al, 2014;Brondani et al, 2014;Fernandes et al, 2018;Rocha et al, 2015). Mini-cutting technique has been successfully used in the propagation of native forest species as an example, Cedrela fissilis (Xavier et al, 2003); Anadenanthera macrocarpa (Dias et al, 2015); Handroanthus heptaphyllus (Freitas et al, 2016); Tibouchina sellowiana (Fragoso et al, 2017); Peltophorum dubium (Mantovani et al, 2017); Cabralea canjerana (Burin et al, 2018). Despite the remarkable advances in clonal forestry obtained for the species of Brazilian flora, the formation of quality stock plants requires precise management, which depends on other factors such as the choice of container, substrate, dose and type of fertilizer, among others.…”