The objective of this study was to evaluate the initial growth of seedlings of M. urundeuva established in different substrates. The study was carried out at the Laboratory of Seeds and Nursery Plants of UNEB, Barreiras, Bahia State, Brazil. Seeds were collected from trees at the University Campus. The experimental design was a completely randomized with four replications and six treatments: T1 soil, T2 sand, T3 soil + sand + manure, T4 wood bark, T5 sugar cane bagasse + manure; T6 sugar cane bagasse + manure + ash. The seeds were sown in plastic trays with different substrates, using 20 seeds at 1.0 cm of depth. We evaluated the index of emergency speed (%), height of shoot and radicle, length of seedlings and leaves, leaf number, fresh and dry mass of shoots and radicle. Established seedlings using wood bark as substrates obtained better results regarding to the number and length of leaves, shoot height, fresh and dry mass of shoots. In contrast, percentage of emergency speed index obtained the worst results in seedlings established on substrates with wood bark. The rootlets results did not differ between the seedlings established in different substrates. The substrates containing wood bark or sugar cane bagasse + manure, provide the best conditions for the initial growth of M. urundeuva seedlings.
Mastic; Germination; Forest seeds
