The vegetative and root development of the species of Brazilian orchids Cattleya intermedia (John Lindley) and Miltonia clowesii (John Lindley) using different substrates and pyroligneous extract were assessed. Seedlings from in vitro propagation were transferred to vessels with: T1 -Pinus bark (Pi), coconut fibers (Co) and charred peel of rice (Cr); T2 - PiCoCr and vegetal charcoal (Ch), T3 - PiCoCrCh with the charcoal treated with pyroligneous extract (PE); T4 - CoCrChEP and T5 - CoCrCh. The materials used in substrates were placed in the same ratio. Plant height, number of roots, length of the greater root, number of buddings, total fresh mass and pH were assessed seven months after experiment onset. For Para C . intermedia, T3 was superior than the other treatments, with higher values for the studied parameters. T4, followed by T2, were the treatments in which the values were closer to the best treatment. For Milt. clowesii the same tendency was found, although without the same magnitude in the differences among treatments. In general, pyroligneous extract incremented the vegetative and root development of the studied orchids.
Orchidaceae; wood vinegar; charcoal; pyroligneous acid; vegetative development; rooting
