Emergence of flamboyant (Delinox regia L.) seedlings as affected by position and sowing depth

The present work aimed to determine the most suitable depth and position of sowing for the emergence of flamboyant seedlings. The seeds were placed to germinate at the depths of 0, 1, 2 and 4 cm with the hilum perpendicular turned up and down to the surface of the substratum and the hilum parallel to the low surface. The emergence percentage of flamboyant seedlings was favored by the seeds with the hilum perpendicular turned up and the hilum parallel to the surface of the substratum. The sowing of seeds with the hilum perpendicular turned up, reduced inversely and linearly the emergence speed index of flamboyant seedlings with increased sowing depth. Moreover, the sowing of seeds with the hilum parallel to the surface of the substratum, reduced inversely and quadratically the emergence speed index of flamboyant seedlings after 2.04 cm of sowing depth. While, the highest values of height were observed in seeds with the hilum perpendicular turned up. The emergency of flamboyant seedlings with hilum perpendicular turned up and 0 cm sowing depth to the surface of the substratum is the most suitable.