Além do enraizamento: aumento do crescimento e do vigor no período pós-enraizamento da planta ZZ (Zamioculcas zamiifolia) por meio de um protocolo integrado de propagação
DOI:
https://doi.org/10.1590/2447-536X.v32.e323044Palavras-chave:
ANA, crescimento de plântulas, estaca foliar, rizoma, substrato de enraizamentoResumo
Este estudo teve como objetivo otimizar a propagação por estacas foliares da planta ZZ (Zamioculcas zamiifolia), que normalmente apresenta crescimento lento após o enraizamento. No primeiro experimento, quatro tipos de estacas foliares (lâmina+raquis, lâmina, basal e apical) foram testados em quatro substratos: fibra de coco (FC), fibra de coco+perlita (FC+PL), turfa+perlita (T+PL) e vermicomposto+vermiculita (VC+VM). O sucesso no enraizamento foi elevado (>88%) em todos os tratamentos, mas o crescimento pós-enraizamento variou significativamente. As estacas do tipo lâmina e lâmina+raquis nos substratos FC e T+PL apresentaram melhor desenvolvimento de rizoma, maior área foliar e biomassa, provavelmente devido às maiores reservas iniciais de carboidratos e nitrogênio. Com base nesses resultados, um segundo experimento avaliou os efeitos do ácido naftalenoacético (ANA) nas concentrações de 0, 1000 e 2000 mg L-1 nas estacas com melhor desempenho nos substratos FC e T+PL. O substrato T+PL mostrou-se ideal para o crescimento de raízes e rizomas, graças ao seu equilíbrio entre retenção de água e aeração. Os maiores valores de volume radicular (6,05 cm3), área foliar (51,5 cm²), teor de clorofila nas folhas (5,80 mg g-1) e massa fresca da planta (15,93 g) foram obtidos com a aplicação de ANA (2000 mg L-1) em estacas do tipo lâmina+raquis no substrato T+PL. Esses achados oferecem um protocolo prático para a produção eficiente em viveiros e propagação em larga escala da planta ZZ.
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Copyright (c) 1969 Nafis Ahouri, Shirin DianatiDaylami, Soheil Karimi
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
