Propagação vegetativa de gabirobeira por estaquia/ Willany Rayany Formiga de Melo

Abstract

Due the great potential for cultivation and the difficulty of obtaining a uniform orchard with desirable characteristics by seeds, the aim of this study was determine the way to propagation by herbaceous cuttings of gabirobeira (Campomanesia adamantium) in a mist chamber. Two studies were performed in the Universidade Estadual de Goiás, Câmpus Ipameri, where was evaluated aplication of IBA at six concentrations (0, 1500, 3000, 4500, 6000 e 7500 mg L-1) with 4 replications where each one was composed by 25 cuttings, from the top and middle of them, in the first study. In the second study was evaluated the stock plant effect in rooting of cuttings by 5 matrices under IBA at 5000 mg L-1 concentration with 4 replications where each one was composed by 20 cuttings, from the top and middle of them. The mist chamber was scheduled for five daily irrigation and one night irrigation. We evaluated percentage of survivors cuttings, callus formation and rooted cuttings to 120 after implantation of the experiment. The data were transformed into arcsine root percentage and analyzed by Sisvar software, and the averages compared by Scott-Knott test at 5% error probability. No significant differences were observed at the first study between treatments, the average rooting percentage of 16.79% and the formation of callus 41.25% at 120 days after implantation. The plots ranged from 0 to 62% rooting within the treatment. Such desuniformity of results could be due to the environment that the experiment was conducted, the main problem was the distribution of nebulizers which resulted in a high coefficient of variation. The stock plants variation was observed on three levels, the overall average of rooted cuttings was 14.20%, this percentage has focused on stock plant 03, that showed 43% of rooting. These results demonstrate that there is genetic variability for selection of promising stocks plants for vegetative propagation to herbaceous cutting with the aid of growth rooter.