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Horticultura Brasileira

versão impressa ISSN 0102-0536

Resumo

MENEZES JUNIOR, Francisco Olmar G.; FERNANDES, Heloísa S.; MAUCH, Carlos Rogério  e  SILVA, João Baptista da. Characterization and performance of different substrates for lettuce plug-type transplants production under protected environment. Hortic. Bras. [online]. 2000, vol.18, n.3, pp.164-170. ISSN 0102-0536.  http://dx.doi.org/10.1590/S0102-05362000000300004.

The purpose of this work was to evaluate nine substrates for lettuce plug-type transplants production under plastic greenhouse. Two commercial substrates (Plantmax and Planta Forte) and one mixture recommended by the extension service (EMATER-RS) were compared with six formulated mixtures from "red-yellow podzolic soil" (S) or peat "Petrolini" (T) mixed in three different proportions on a volume/volume bases (1:3, 1:1, 3:1), with an earthworm compost (V). The physical and chemical proprieties of each treatment and the biological response were evaluated, as well as the technical and economical feasibility of producing these substrates in the farm. Best responses were obtained with S75V25, S50V50 e S25V75 mixtures. These substrates can substitute with advantage the two commercial substrates and the mixture recommended by extension service.

Palavras-chave : Lactuca sativa; earthworm compost; technical and economical feasibility.

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