Influência da posi??o e da profundidade de semeadura na emergência de plantulas de a?aí (Euterpe oleracea Mart. - Arecaceae)

摘要

The present work had the objective to determine the most suitable depth and position of sowing for the emergency of a?aizeiro seedlings. The seeds were placed to germinate at the depths of 0; 3 and 6 cm and in the following positions: with the raphe perpendicular to the surface of the substratum and germinative aperture up, the raphe perpendicular and germinative aperture down, the raphe parallel to the low surface and germinative aperture down, and raphe parallel to the surface and germinative aperture up. The emergency of a?aizeiro seedlings with rafe perpendicular to the surface of the substratum and germinative aperture up is the most suitable, as it provides an equal percentage and minor average time of emergency. Depths equal or superior to 3 cm are inadequate for sowing of Euterpe oleracea Mart.