CLONAL PROPAGATION OF Cnidoscolus quercifolius BY AIR-LAYERING

Abstract

Cnidoscolus quercifolius \ue9 uma planta oleaginosa que pode ser empregada para recupera\ue7\ue3o de \ue1reas degradadas, alimenta\ue7\ue3o animal e humana, medicina, serraria, energia, biodiesel, dentre outros. A clonagem desta planta \ue9 uma boa alternativa de produ\ue7\ue3o de mudas, tanto como uma ferramenta para o melhoramento da esp\ue9cie como tamb\ue9m para os produtores. Objetivou-se avaliar a produ\ue7\ue3o de mudas de faveleira pelo m\ue9todo de alporquia, usando cinco concentra\ue7\uf5es de AIB e dois substratos. Avaliou-se tamb\ue9m o tempo necess\ue1rio para o surgimento de ra\uedzes. O delineamento experimental utilizado foi blocos casualizados, em esquema fatorial 5 x 2, com 10 repeti\ue7\uf5es. Cada parcela experimental constituiu de um alporque, totalizando 100 parcelas, sendo os tratamentos a combina\ue7\ue3o das cinco concentra\ue7\uf5es de AIB (0,0; 1,5; 3,0; 4,5 e 6,0 g L-1) com os dois tipos de substratos (vermiculita e substrato comercial). Houve efeito estimulante atrav\ue9s da aplica\ue7\ue3o do \ue1cido indolbult\uedrico (AIB), obtendo-se os melhores resultados de porcentagem de alporques enraizados, n\ufamero de ra\uedzes e massa seca das ra\uedzes com a concentra\ue7\ue3o de 6,0 g L-1. O surgimento das ra\uedzes na superf\uedcie dos substratos ocorreu aos 42 dias ap\uf3s a realiza\ue7\ue3o dos alporques. N\ue3o foi constatada diferen\ue7a significativa entre os substratos para nenhuma vari\ue1vel.Cnidoscolus quercifolius is an oleaginous plant that can be used for the rehabilitation of degraded areas, feed and food, medicine, sawmill and energy. Clonal propagation of faveleira is a good alternative to seedling production, just like a tool in the plant improvement and to the producers. This study aims to evaluate the efficiency of the air-layering technique on the propagation vegetative of the faveleira, with the view to determine the effect of five concentrations of indolbutyric acid (IBA) and two substrates. There were also evaluated the time necessary for the emergence of roots. The experimental design was a randomized complete block design in a 5 x 2 factorial scheme, with 10 repetitions. Each plot consisted of a pruned layers, totaling 100 plots, and treatments combining the five IBA concentrations (0,0; 1,5; 3,0; 4,5 e 6,0 g L-1) with the two types of substrates (vermiculite and commercial substrate).There was significant stimulating effect by applying \u2018indobult\uedrico\u2019 acid (IBA), to obtain the best results the percentage of air layers roots, root number and root dry mass with a concentration of 6.0 g L-1. The emergence of the roots on the surface of the substrates occurred at 42 days after the completion of the air layering. There was no significant difference between the substrates for any variable