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O desenvolvimento vegetativo e de raízes de espécies das orquídeas brasileiras Cattleya intermedia (John Lindley) e Miltonia clowesii (John Lindley) utilizando diferentes substratos e extrato pirolenhoso foi avaliado. Mudas produzidas in vitro foram transferidas para recipientes com: T1 – casca de pinus (Pi), fibra de coco (Co) e casca de arroz carbonizada (Ca); T2 – PiCoCa e carvão vegetal (Car); T3 – PiCoCaCar, sendo o carvão vegetal tratado com extrato pirolenhoso (EP); T4 – CoCaCarEP; e T5 – CoCaCar. Todos os materiais foram utilizados na mesma proporção. Altura da parte aérea, número de raízes, comprimento da maior raiz, número de brotos, massa fresca total e pH foram avaliados sete meses após a instalação do experimento. Para C. intermedia, o T3 foi superior aos outros tratamentos, com valores maiores para os parâmetros estudados. O T4 e, a seguir, o T2 foram os tratamentos nos quais os valores mais seaproximaram do melhor tratamento. Para Milt. clowesii, a mesma tendência se verificou, entretanto sem a mesma magnitude nas diferenças entre os tratamentos. De maneira geral, o extrato pirolenhoso incrementou o desenvolvimento vegetativo e radicular das orquídeas estudadas.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.

Substratum and pyroligneous extract in the cultivation of Brazilian orchids Cattleya intermedia (John Lindlcy) and Miltonia clowali (John Lindley) (Orchidaceae). The vegetative and root development of the species of Brazilian orchids Cattleya intennedia (John Lindley) and Mitonia clowesli (John Lindky) using different substrates and pyroligneous extract were assessed. Seedlings from in citro 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. intennedia, 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 diffrences among treatments. In general, pyroligneous extract incremented the vegetative and root development oldie studied orchids. [ABSTRACT FROM AUTHOR]