REHABILITATION OF A DEGRADED AREA IN THE FIELD OF SEMIDECIDUOUS SEASONAL FOREST UNDER DIFFERENT TREATMENTS

Objetivou-se avaliar tr\ueas tratamentos de restaura\ue7\ue3o florestal em uma \ue1rea com eleva\ue7\ue3o peri\uf3dica do len\ue7ol fre\ue1tico, no Corredor de Biodiversidade Santa Maria, localizado entre os munic\uedpios de Santa Terezinha de Itaipu e S\ue3o Miguel do Igua\ue7u-PR. Os tratamentos foram: controle, aduba\ue7\ue3o verde e solariza\ue7\ue3o do solo. Foi realizado o acompanhamento mensal da mortalidade e desenvolvimento de 12 esp\ue9cies arb\uf3reas nativas da regi\ue3o e a persist\ueancia de duas esp\ue9cies invasoras presentes na \ue1rea, Megathyrsus maximus (capim-coloni\ue3o) e Cyperus rotundus (tiririca). Al\ue9m disso, avaliou-se as altera\ue7\uf5es promovidas no solo por meio de tr\ueas coletas durante o experimento. Ap\uf3s um ano, os tratamentos n\ue3o apresentaram diferen\ue7as estat\uedsticas significativas sobre as avalia\ue7\uf5es realizadas. A mortalidade foi mais acentuada em janeiro (12,08%), com maior percentual para Cabralea canjerana (canjarana) e menor para Luehea divaricata (a\ue7oita-cavalo). Sobre o desenvolvimento das mudas, houve maior crescimento para: Sapium glandulatum (leiteiro-do-banhado), Croton urucurana (sangra-d\u2019\ue1gua) e Luehea divaricata, com acr\ue9scimos mensais em di\ue2metro de 3,66 mm a 4,12mm, e em altura de 12,39 cm a 17,02 cm. Em rela\ue7\ue3o \ue0 massa seca do capimcoloni\ue3o e tiririca em todos os tratamentos, os maiores valores foram verificados em janeiro (94,14 g m-2) e fevereiro (132,76 g m-2), mantendo-se baixos ao longo do experimento. Por meio das an\ue1lises de solo, foi poss\uedvel observar que os tratamentos n\ue3o apresentaram diferen\ue7as significativas, contudo, as altera\ue7\uf5es f\uedsicas e qu\uedmicas do solo mostraram-se sens\uedveis ao manejo das esp\ue9cies invasoras, podendo levar a novas modifica\ue7\uf5es durante o desenvolvimento das mudas.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\ue3o Miguel do Igua\ue7u, in Paran\ue1 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\ue7oita-cavalo). About the seedlings development, growth was higher for: Sapium glandulatum (leiteiro-do-banhado), Croton urucurana (sangra-d\u2019\ue1gua) 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 \u2018coloni\ue3o\u2019 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