Estaquia herbácea e semiherbácea de Murici Byrsonima crassifólia (L.) Rich e Cambuí Myrciaria floribunda (H. West Ex Willd.) O. Berg] em diferentes concentrações de ácido indolbutírico (AIB)

Abstract

Brazil has a large diversity of native fruit, but few are grown commercially. The vast majority are still exploited in highly extractive way, as is the case muricizeiro (Byrsonima crassifolia (L.) Rich) and cambuizeiro (Berg O. Myrciaria floribunda). In order to evaluate the effect of the growth regulator IBA (IBA) and different substrates on rooting of softwood cuttings and semiherbaceous these species in order to obtain seedlings, three experiments were performed. All conducted in intermittent mist Center for Agricultural Sciences in Rio Largo, AL. In the first experiment, the semiherbaceous cuttings of B. crassifolia were collected and subjected to the conditions of rooting. The experimental design was completely randomized with 2 x 5 factorial, with two types of cuttings (apical and subapical) and five IBA concentrations (0, 500, 1000, 2000 and 4000 mg Kg-1 of talc). In the second, the cuttings of B. crassifolia were subjected to treatments with plants of different ages (young and old) and subjected to three IBA concentrations (0, 500, 1.000 mg L-1). In the third experiment, we studied the rooting of cuttings semiherbaceous M. floribunda about 5 x 2 factorial design, with two types of substrates (Bioplant ® and coarse sand) and five IBA concentrations (0, 500,1.000, 2.000 and 4000 mg Kg-1) mixed with inert talc. It was observed that murici can be propagated by softwood cuttings taken from semiherbaceous and vegetative branches, and the highest rooting percentages obtained during the summer under intermittent mist system. The rate of mortality of semiherbaceous cambuizeiro cuttings, collected in september, was high (51,25%). The coarse sand substrate provided in Cambui 32,5% of callused cuttings.