Abstract

GARCIA, Saulo Ferreira; OLIVEIRA, Camila de  and  SILVA, Breno Marques da Silva e. Seedling emergence of Tabebuia caraiba (Mart.) Bureau. Cienc. Rural [online]. 2012, vol.42, n.8, pp. 1419-1422. ISSN 0103-8478.  http://dx.doi.org/10.1590/S0103-84782012000800014.

The purpose of this research was to determine the substrate and sowing depth for yellow "ipê" seedling emergence. For the emergency, seeds had been used, distributed in plastic boxes, with sand, soil, "açaí" triturate residue (endocarp + seed), vermiculite, sawdust, sand + vermiculite (1:1), sand + "açaí" triturate residue (1:1), sand + sawdust(1:1) and sand +soil (1:1) or in 0, 1, 2 and 4 cm of sowing depth and kept in greenhouse. The emergency percentage and emergency speed were evaluated for the substrate and sowing depth. The optimum substrate for seedling emergence is sand, vermiculite, sand+vermiculite (1:1), sand + "açaí" triturate residue (1:1) and sand + soil (1:1). Sowing depths higher than 1 cm are inadequate for yellow "ipê" emergence.

Keywords : savanna yellow "ipê"; substrate; sowing depth; Bignoniaceae.