Efeitos combinados de fertilizante NPK e benzil amino purina (BAP) na aceleração do crescimento vegetativo da orquídea Cattleya
DOI:
https://doi.org/10.1590/2447-536X.v30.e242787Palavras-chave:
aplicação foliar, citocinina, orquídea, regulador de crescimento vegetalResumo
O crescimento vegetativo das orquídeas Cattleya é influenciado por fatores ambientais. Além disso, o crescimento e o desenvolvimento também são determinados pela disponibilidade de nutrientes e hormônios. Um dos métodos para acelerar o crescimento vegetativo das orquídeas é pela aplicação de fertilizantes NPK reguladores de crescimento vegetal, como benzil amino purina (BAP). O objetivo deste estudo foi obter a melhor concentração de NPK e concentração de BAP no crescimento vegetativo das orquídeas Cattleya. O experimento foi conduzido na estufa do Jardim Experimental de Bale Tatanen, Faculdade de Agricultura, Universidade Padjadjaran com um delineamento fatorial em blocos casualizados consistindo de dois fatores, a saber, a concentração de fertilizante NPK (0, 1, 2, 3 e 4 g L-1 de NPK-28:10:10 e 2 g L-1 de NPK-32:10:10 como controle positivo), e o segundo fator foi a concentração de BAP (0, 0,5 e 1 mg L-1) com três replicações. Os resultados mostraram que houve efeito de interação entre a aplicação de 2 g L-1 de NPK 28:10:10 e 1 mg L-1 de BAP sobre o número de pseudobulbos por touceira. Independentemente, o tratamento de 2 g L-1 de NPK 28:10:10 apresentou os melhores resultados no aumento da altura da planta e no número de novos brotos. Enquanto 0,5 mg L-1 de BAP apresentou os melhores resultados no aumento da altura da planta, no número de novos brotos e no valor SPAD.
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