The objective of this study was to evaluate the effect of seed treatment and substrate composition on the seed and seedling quality of tree species. The species were "Acácia" (Cassia multijuga), "angico" (Parapiptadenea rigida), "canafístula" (Pelptophorum dubium), "maricá" (Mimosa bimucronata) and "timbaúva" (Entereolobium contortisiliquum). The seeds were treated with a solution of sodium hypochlorite at 1%, for 5 minutes and another seed lot did not receive any type of pre-treatment. For seedling production, two substrate compositions were used: substrate A, consisting of 50% soil and 50% organic substance and substrate B, consisting of 35% pine debris and degraded organic substance, 35% soil and 30% burnt rice husk. Seed health, germination, seedling emergence ate seven and 28 days, cool weight, dry weight, length and leaf number were assessed. The main fungi associated with the seeds was Aspergillus spp., Penicillium spp. and Alternaria spp., with higher incidences in the non pre-treated seeds. In the evaluation of the seedling quality, substrate A was shown to the better than substrate B, producing seedlings with high biological performance. The seed asepsis showed positive effect on the seed sanitary quality and in the initial phase of the seedling development. In the final phase, the effect of the substrate was preponderant, where the substrate composition made a difference.
fungi; germination; forest
