Effect of silicon on the quality of flowers of Dendrobium nobile (Orchidaceae)

Patricia Reiners Carvalho, Ricardo Tadeu Faria, Inês Cristina de Batista Fonseca, Oscar de Andrade Junior

Abstract


The orchid Dendrobium nobile Lindl is widely cultivated throughout the world as cut and potted flowers. Silicon (Si) has demonstrated beneficial effects on various crops, increasing cell stiffness, giving protection to pathogens, increasing photosynthetic capacity and drought tolerance, promoting higher growth and longevity. The aim of this study was to evaluate the effect of different concentrations of silicon on Dendrobium nobile orchid flowers. Treatments were performed with magnesium silicate (SiMg) at the following concentrations: 0.0, 0.16; 0.32; 0.48 and 0.64 g L-1. The foliar applications were carried out fortnightly totaling four applications two months before flowering. The variables evaluated were: longevity of flowers, number of flowers per pot and number of shoots per plant. The experimental design was completely randomized with five treatments and ten replications. The foliar applications of SiMg increased 59% flower production and shoots up to 66%, being more efficient with the increasing of concentrations. The increasing of longevity of the flowers in the dose 0.45 g L-1 was up to four days.


Keywords


Magnesium silicate; Orchid; Nutrition; Potted flower.



DOI: http://dx.doi.org/10.5433/1679-0359.2013v34n4p1615

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional