
handle: 10183/256101
Podranea ricasoliana (Tanfani) Sprague é uma espécie utilizada como ornamental, por sua floração abundante e vistosa, especialmente em cercas. Com o presente trabalho objetivou-se avaliar os efeitos de concentrações de ácido indol-3-butírico (AIB) na brotação, sobrevivência e enraizamento de estacas semilenhosas de P. ricasoliana. Estacas de diferentes comprimentos e com um par de folhas foram coletadas no município de Porto Alegre-RS, sendo a base destas colocada em contato com os tratamentos de AIB em pó (0, 500, 1000, 2000 e 4000 mg kg-1). Após, as estacas foram colocadas em bandejas com substrato casca de arroz carbonizada, as quais foram mantidas em ambiente protegido com nebulização intermitente. O delineamento foi em blocos ao acaso, com cinco repetições de dez estacas por parcela. Os resultados foram submetidos à análise de variância (ANOVA). Para todas as variáveis analisadas, não foram observadas diferenças estatísticas. Foi constatado percentual médio de brotação inicial de 70,8%, percentual de folhas restantes de 75,2%, média de número de brotos por estaca de 1,28, percentual médio de sobrevivência das estacas de 87,6%, percentual médio de estacas enraizadas de 45,2% e comprimento médio do sistema radicular de 5,06 cm. A partir dos resultados encontrados, pode-se concluir que a propagação vegetativa por meio de estaquia é viável para a espécie P. ricasoliana. Além disso, verificou-se que o uso de AIB não afeta as variáveis analisadas.
Podranea ricasoliana (Tanfani) Sprague is a species used as ornamental, for its abundant flowering and showy, especially in fences. The present study aimed to evaluate the effects of different concentrations of indol-3-butyric acid (IBA) in budding and survival of softwood cuttings of P. ricasoliana. Cuttings of different sizes and with a pair of leaves were collected in the city of Porto Alegre-RS, being the basis of these placed in contact with the AIB treatment powder (0, 500, 1000, 2000 and 4000 mg kg-1). After the cuttings were placed in trays with carbonized rice shell substrate, which were kept in a protected environment with intermittent mist. The experimental design was a randomized block with five repetitions and ten cuttings per share. Data were submitted to analysis of variance (ANOVA). No statistical differences were found for any of the evaluations. It has been found average percentage of early budding of 70,8%, a percentage of remaining sheets of 75,2%, average number of shoots per cutting of 1,28, average percentage survival of cutting of 87,6%, average percentage of rooted cuttings of 45,2% and average length of the root system of 5,06 cm. It is concluded that the use of cuttings for vegetative propagation of P. ricasoliana species is viable. Furthermore, it was found that the use of IBA does not affect the variables analyzed.
Estaca, Vegetative propagation, Sete-léguas, Propagação vegetativa, IBA
Estaca, Vegetative propagation, Sete-léguas, Propagação vegetativa, IBA
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