RECUPERA??O DE áREA DEGRADADA NO DOMíNIO FLORESTA ESTACIONAL SEMIDECIDUAL SOB DIFERENTES TRATAMENTOS

摘要

It was aimed to evaluate three treatments for forest restoration in an area with periodic elevation of the groundwater, in the Corredor de Biodiversidade Santa Maria, located between the cities of Santa Teresinha de Itaipu and S?o Miguel do Igua?u, in Paraná state. The treatments were: control, green manure and soil solarization. It was performed a monthly monitoring of mortality and development of 12 tree native species of the region and the persistence of two invasive species present in the area, Megathyrsus maximus (coloniao grass) and Cyperus rotundus (coco grass). Furthermore, it was evaluated the changes introduced in the soil by three soil samples during the experiment. After over a year of assessment, the treatments showed no statistically significant differences on the evaluations. The mortality was more pronounced in January (12.08%), with a higher percentage for Cabralea canjerana (canjarana) and lower for Luehea divaricata (a?oita-cavalo). About the seedlings development, growth was higher for: Sapium glandulatum (leiteiro-do-banhado), Croton urucurana and Luehea divaricata , with monthly increases in diameter of 3.66 mm to 4.12 mm, and height of 12.39 cm to 17.02 cm. Regarding the dry mass of ‘coloni?o’ grass and coco grass (nutsedge) in all treatments, the highest values were? found in January (94.14 g m -2 ) and February (132.76 g m -2 ), remaining low throughout the experiment. Through soil analyzes, it was observed that treatments showed no significant differences, however, the physical and chemical changes in the soil were sensitive to the invasive species management, which may lead to new modifications during the growth of seedlings.?.