Ácido fúlvico melhora características morfofisiológicas e vida de vaso em Alstroemeria ‘Orange Queen’ cultivada sem solo
DOI:
https://doi.org/10.1590/2447-536X.v31.e312802Palavras-chave:
Características bioquímicas, Bioestimulante, Índices de floração, Pigmentos fotossintéticos, Vida de vasoResumo
Este estudo avaliou o potencial do ácido fúlvico como um bioestimulante para aumentar os índices de floração, características bioquímicas e vida de vaso em Alstroemeria ‘Orange Queen’. Conduzido sob condições controladas de estufa, o experimento envolveu aplicações foliares de ácido fúlvico em concentrações de 50, 100 e 200 mg L-¹. Os resultados revelaram melhorias significativas em parâmetros-chave, particularmente com o tratamento de 100 mg L-¹. Esta concentração ótima aumentou notavelmente o diâmetro do broto, o comprimento do broto e os pesos fresco e seco do florete em comparação com o controle. Além disso, a aplicação de ácido fúlvico aumentou significativamente os teores de clorofila a clorofila b, clorofila total, carotenoides e antocianinas, melhorando assim a eficiência fotossintética e a pigmentação das flores. O maior acúmulo de carboidratos foi evidenciado pelo aumento dos níveis de açúcar solúvel nas folhas e pétalas, particularmente em 100 mg L-¹. Além disso, o ácido fúlvico estendeu significativamente a vida útil do vaso de flores cortadas, com a concentração de 100 mg L-¹ fornecendo o maior benefício. Essas descobertas ressaltam a eficácia do ácido fúlvico como um bioestimulante para otimizar características estéticas e fisiológicas em Alstroemeria. Ao promover o crescimento, melhorar a composição do pigmento e estender a longevidade das flores, o ácido fúlvico surge como uma ferramenta valiosa na horticultura ornamental. Palavras-chave: Características bioquímicas, Bioestimulante, Índices de floração, Pigmentos fotossintéticos, Vida de vaso.
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