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Determinaram-se, neste estudo, desenvolvido no Centro Experimental de Campinas, em 15 de janeiro-6 de agosto de 1992, os níveis de enraizamento de estacas rejuvenescidas de bambu (Bambusa vulgaris Schrad.), e o efeito do fitorregulador ácido naftaleno acético (ANA) nesse enraizamento. Estudaram-se três tipos de estaca, a saber: basal, primária e secundária, obtidas, por sua vez, em touceiras rebrotadas após 60 dias do corte total ou arrasante dos colmos. Para o tratamento com o fitorregulador de crescimento ANA, as estacas permaneceram com suas bases imersas, por 24 horas, em diversas concentrações (0, 25, 50, 100 e 200 mg/L). Os resultados mostraram que os melhores níveis de enraizamento foram obtidos com as estacas basais, sendo de 100 mg/L a melhor concentração do fitorregulador. O enraizamento foi relativamente baixo nas estacas primárias e inexistente nas secundárias. The rooting levels of renewed cuttings of Bambusa vulgaris were determined after treatments with NAA, a rooting-promoting substance named naphthalene acetic acid. Three types of cuttings were studied (basal, primary and secondary). These cuttings were obtained 60 days after the mother clumps have been felled. For the treatment with the rooting-promoting substance, the lower end of the cuttings remained in different NAA concentrations (0, 25, 50, 100 and 200 mg/L) for 24 hours. The best rooting levels were obtained with the basal cuttings, when the NAA concentration was 100 mg/L. The primary cuttings showed poor rooting formation, while the secondary cuttings showed no rooting. This study was carried out at the Centro Experimental de Campinas (Instituto Agronômíco de Campinas), State of São Paulo, Brazil, from January 15 until August 6, 1992

Enraizamento de estacas rejuvenescidas de bambu tratadas com ácido naftaleno acético