Estudo piloto do banco de sementes de um fragmento florestal em Caçapava do Sul – RS

Abstract

Within the rational use of natural resources, it enters the preservation of our forests and water resources, in this sense the vegetation cover plays an important role in the protection and conservation of the soil. The purpose of this study was to evaluate the germination potential of the seed bank of a forest fragment and its feasibility in the use of the nucleation technique in the recovery of degraded areas. In order to select the collection sites, we used images from Google Earth, after selecting four possible sites, a field trip was carried out to confirm the potential of these areas and to collect the material, in each site five soil samples were collected (S) and five soil samples (S + SE) at 0.5 cm depth with a template of 25 x 25 cm², the samples were placed in plastic trays arranged in a suitable place for germination of the seedlings. From September to November the seedlings were quantified and it was possible to verify the existence of twenty different species, but it was not possible to determine each one of them. In the treatment containing only soil counted 145 seedlings, and in the treatment of soil plus the litter 150 seedlings. It was observed that the temperature, light and humidity, are the environmental factors responsible for germination, the presence of the litter together with the soil, was important to ensure a greater number of seedlings. The seed bank presents a good germination potential of the seedlings, being feasible the use of the same to be used in the technique of soil transposition, needing further studies to consolidate the trend observed in the present study.