Época do ano, idade da planta matriz e concentrações de AIB no enraizamento de mini-estacas de cerejeira-do-mato

Abstract

Eugenia involucrata popularly known as cherry-grove is a species of the family Myrtaceae with great potentiality of use, but still little explored. In order to revert such a framework, it is necessary to select superior genotypes and subsequent propagation of seedlings, so that they maintain such characteristics that have been selected. Only in this way can they be used in commercial plantations. In this way the asexual propagation becomes of great importance, although still studies are lacking on this in the species in question. Mini-cutting is a form of asexual propagation that has not yet been tested for the species and which can provide the formation of seedlings of quality and vigor. Thus, the objective of the present work was to test the mini-cutting in Eugenia involucrata, as well as the factors that interfere in its success, such as AIB concentration, age of the mother plant and seasons of the year. The experiment was carried out in a greenhouse at the Universidade Tecnológica Federal do Paraná, Câmpus Dois Vizinhos. The experimental design was completely randomized in factorial 2 x 5 x 5 (matrix ontogeny x collection period x AIB concentration), with four replications, with the number of mini-cuttings per replication variable according to availability. The material was prepared with a length of 6 cm, and its mini-staking was carried out in plastic boxes containing commercial substrate, where 2/3 of the material was introduced. From the mini-stakes the calogenesis, rooting, number of roots and length of the three largest roots were evaluated. The data were first submitted to the normality test of Lilliefors, after analysis of variance and when significant to the regression test for the quantitative factor and comparison of means of Duncan for the qualitative. As for the results, for the mini-cuttings of adult plant, null values were found for all the analyzed variables, unlike those collected from the young mother plant, where it was obtained significance for the collection factor for the variables rooting, number Of roots and length of the three largest, where the seasons April / 2015 and February / 2016 obtained the best results. There was no significance for all possible interactions, and when analyzed separately for the ontogeny factors of the matrix plant and AIB concentrations. Regarding calogenesis this was not found in any mini-cuttings. Thus, it is concluded that minicutting can be used to propagate cherry bush, and the use of young seedlings is indicated, in times when the matrix plant has a large amount of reserves (April / 2015) and also in (February / 2016), without the need for AIB. However if the objective is to obtain satisfactory rhizogenesis one must test other factors and levels.