Miniestaquia a partir de material juvenil de origem seminal na clonagem de Myracrodruon urundeuva Allemão.

Abstract

Myracrodruon urundeuva Allemão, is an arboreal species native to Brazil, family Anarcadeaceae, commonly known as aroeira and aroeira do sertão. The propagation of the species is usually carried out using seeds (diaspores). However, they lose the germinative power in a short time. One of the alternatives to propagate the species when there is seed limitation is the use of the cloning technique called ministump. The objective of this work was to evaluate the seed ministumps of seminal origin, from the 2nd year of their establishment, submitted to different cutting heights (10, 25 and 40 cm) and the efficiency of the use of extract of tubers of Cyperus rotundus L. in the survival and rooting of minicuttings by the minicutting process. The research was carried out in the forest nursery of the Academic Unit of Forest Engineering, UFCG Patos campus. In the first stage the clonal minigarden was formed, with ministumps of seminal origin and submitted to three cutting heights (10 cm, 25 cm and 40 cm). The ministump were arranged in a completely randomized design with three treatments (cut-off system) and 12 replications, where each plot consisted of a ministumps, totaling 36 plots. The variables analyzed were ministump survival, collection diameter and ministump production. In the second stage, the use of extract of tubers of Cyperus rotundus L was evaluated and with the support of the clonal minigarden where the minicuttings were collected. Dice were also used, the plots consisted of six minicuttinps, with eight treatments (concentrations of the extract of Cyperus rotundus L. - 0.0% (control 1) at 5.0% and (controls 2 and 3) and three treatments The high survival rate of the Myracrodruon urundeuva ministumps is important because it indicates that this system has the potential to be used in this species. Cutting at 10 cm is more indicated as it allows the beginning of the production of the propagules earlier and consequently the return of the investment faster. This study demonstrated the potential of the aqueous extract of Cyperus rotundus L (tririca), considering an economical alternative to be used in cloning of Myracrodruon urundeuva, but more studies need to be performed to evaluate the concentration that provides a higher rooting rate.