Reabilitação de trilhas erodidas em afloramento rochoso sobre quartzito em campo rupestre (Serra da Calçada /MG)

Abstract

The practice of extreme sports in the Calçada mountain caused the degradation of several trails, resulting in an erosive process, disturbance to headwaters, drainage system and changes in the water courses. The rehabilitation of rocky outcrops and drainages was carried out followed by planting native species in two experimental areas inoculated or not with arbuscular mycorrhizal fungi (AMF). Plant establishment was assessed using the species occupancy method 4 years after planting as compared to a preserved site. The Poaceae family was dominant in both the preserved and restored areas, being the Mesosetum and Paspallum genera the most representatives. Mycorrhizal inoculation favoured plant establishment, biodiversity and favoured the soil mycorrhizal population, largely explaining the increase in soil fertility. There was a significant increase in soil nutrients, especially phosphorus, Soil Organic Matter (SOM), Cation Exchange Capacity (CEC), N-ammonium, micro-porosity as well soil water content and soil water retention capacity, especially in inoculated site. The dominance of the Poaceae family and the presence of a high-water content in these sites are noteworthy, suggesting that this plant family plays an ecosystemic role in relation to the water conduction from the headwater in the campo rupestre areas.