enraizamento de corticeira-da-serra em função do tipo de estaca e variações sazonais rooting of brazilian coral as a function of cutting types and season of the year
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2006
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Abstract
Erythrina falcata Benth. tem sido usada na recuperação de ecossistemas degradados, como planta ornamental e em sistemas agroflorestais. Entretanto, a produção de mudas por sementes é difícil. O objetivo deste trabalho foi avaliar a propagação vegetativa de E. falcata utilizando estacas caulinares provenientes de árvores adultas (estacas herbáceas, semilenhosas e de rebrota) e mudas, coletadas em quatro épocas do ano e o efeito do ácido indolbutírico (AIB) no enraizamento de estacas dessa espécie. Depois de preparadas, as estacas foram imersas em ácido indolbutírico (AIB, 0, 1,5 e 3 g L-1). O material se desenvolveu em tubetes de plástico (55 mL), em casa de vegetação climatizada, a uma temperatura de 25 a 30ºC e umidade relativa do ar acima de 80%, em substrato de vermiculita granulometria média. Maior porcentagem de enraizamento (73%), comprimento das quatro maiores raízes (46 mm) e número de raízes (6,2) foram obtidos em estacas de mudas coletadas no verão. Não houve enraizamento em estacas semilenhosas, provenientes de árvores adultas. A imersão das estacas em AIB não exerceu qualquer influência no enraizamento. As estacas de mudas coletadas no verão são as de melhor propagação vegetativa em virtude de melhor porcentagem de enraizamento e sobrevivência.
Erythrina falcata Benth. may be used as an ornamental plant, in rehabilitation of degraded land and as a component in agroforestry systems. However seedling production from seeds is difficult. The aim of this work was to evaluate vegetative propagation of E. falcata by using stem cuttings obtained from adult trees (softwood cuttings, hardwood cuttings and regrowth cuttings) and cuttings from seedlings collected in the four seasons of the year as well as the effect of indolebutyric acid on rooting of stem cuttings. After cutting preparation, the material was treated with an indolebutyric acid solution (IBA, 0, 1.5 and 3 g L-1). Cuttings were grown in 55-mL tapered plastic containers in a greenhouse at 25 to 30ºC and relative humidity above 80%. The substrate for growing of cuttings was middle texture vermiculite. The highest percentage of rooted cuttings (73%) and root length of four longest roots (46 mm) and root number (6.2) were obtained in seedling cuttings collected in the summer. No rooting was observed in cuttings collected from softwood cuttings raised from adult trees. Cutting immersion in IBA solutions had no effect on rooting. Cuttings from seedlings collected in the summer are recommended because of their high percentage of rooting and survival.
Erythrina falcata Benth. may be used as an ornamental plant, in rehabilitation of degraded land and as a component in agroforestry systems. However seedling production from seeds is difficult. The aim of this work was to evaluate vegetative propagation of E. falcata by using stem cuttings obtained from adult trees (softwood cuttings, hardwood cuttings and regrowth cuttings) and cuttings from seedlings collected in the four seasons of the year as well as the effect of indolebutyric acid on rooting of stem cuttings. After cutting preparation, the material was treated with an indolebutyric acid solution (IBA, 0, 1.5 and 3 g L-1). Cuttings were grown in 55-mL tapered plastic containers in a greenhouse at 25 to 30ºC and relative humidity above 80%. The substrate for growing of cuttings was middle texture vermiculite. The highest percentage of rooted cuttings (73%) and root length of four longest roots (46 mm) and root number (6.2) were obtained in seedling cuttings collected in the summer. No rooting was observed in cuttings collected from softwood cuttings raised from adult trees. Cutting immersion in IBA solutions had no effect on rooting. Cuttings from seedlings collected in the summer are recommended because of their high percentage of rooting and survival.
| Reference Key |
neves2006pesquisaenraizamento
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|---|---|
| Authors | ;Tarcia dos Santos Neves;Antonio Aparecido Carpanezzi;Katia Christina Zuffellato-Ribas;Ricardo Antonio Marenco |
| Journal | proc - the fourth ieee workshop on software technol for future embedded and ubiquitous syst, seus 2006 andthe second int workshop on collaborative comput, integr, and assur, wccia 2006 |
| Year | 2006 |
| DOI |
10.1590/S0100-204X2006001200003
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