Influência do tipo de incisão no ramo, ácido indolbutírico e da forma de proteção do substrato na clonagem de Cnidoscolus quercifolius Pohl (Faveleira) por alporquia.

Abstract

Cnidoscolus quercifolius (faveleira) is a pioneer species of great importance to the Caatinga and semiarid region. Human actions, especially the exploitation of the native species of the Caatinga has gradually contributed to reducing the genetic variability of the species of this biome. One way to contain the spread of this devastation, would be to preserve the native species through the implantation of areas with species of interest. The study aimed to indicate the best level of incision in the industry (annealing), and to evaluate the influence of Synthetic Indole Butyric Acid auxin (IBA) and foil to promote the rooting of this species. For the experiment, we used naturally occurring matrices Cnidoscolus quercifolius (faveleira) trees, located at the Federal University of Campina Grande (UFCG), Campus de Patos / PB. We evaluated three levels of incision, the influence of IBA at a concentration of 6.0 g / L and the influence of foil. The variables were air layering with calluses; presence of air layering with root primordia; rooted presence of air layering and air layering percentage rooted. In rooted air layers we analyzed: the number of roots, root length and dry weight of main roots. Experimental design was used in randomized blocks (DBC), in factorial 3 x 2 x 2. The results showed that the highest rooting percentage occurred in Block IV (41.7%). It was also observed that higher percentages of rooting occurred when using the complete girdling (75%), while AIB was used (33%) and when foil was not used (37.5%).