Alternative substrata for xaxim on culture of Cattleya intermedia X Hadrolaelia purpurata (Orchidaceae)

Mauren Sorace, Ricardo Tadeu de Faria, Inês Cristina de Batista Fonseca, Lilian Yukari Yamamoto, Maria Aparecida da Fonseca Sorace

Abstract


The present work had the purpose of evaluating the efficiency of different substrata by vegetal origin, to grow species of orchids (Orchidaceae). Seedlings of Cattleya intermedia X Hadrolaelia purpurata, obtained by in vitro culture, and acclimated, with medium height of 5 cm, had the following substrata: 1- Defibered xaxim (control); 2- Carbonized rice husk; 3- Coconut fiber; 4- Husk pínus; 5- Carbonized rice husk + Coconut fiber (1:1); 6- Carbonized rice husk + Husk pínus (1:1); 7- Coconut fiber + Husk pinus (1:1); 8- Husk pínus + Carbonized rice husk + Coconut fiber (1:1:1). A randomized design with eight treatments and ten replications. Results were submited to Variance Analysis and Tukey Test at 5 %. Growing parameters evaluated after 17 months were: root length, roots number, height of above ground, buds number, leaves number, leaf length, leaf width, total fresh mass and root volume. Determinated substrata parameters were: pH, eletric conductivity and density. All studied substratum can be recommended to substitute xaxim but, coconut fiber was least efficient to develop roots and aerial parts of plants. Better results were showed by substratum only with carbonized rice husk + husk pine on culture of Cattleya intermedia X Hadrolaelia purpurata.


Keywords


Carbonized rice husk; Husk pínus; Coconut fiber; Orchid



DOI: http://dx.doi.org/10.5433/1679-0359.2009v30n4p771

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