Vegetação, ciclagem de nutrientes e carbono orgânico de solos ornitogênicos da Ilha da Trindade, e da Antártica

• Autor(a) principal: Locatelli, Marcus Vinicius
• Data de Publicação: 2013
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/1662
• topic: Geomorfologia; Solos - Composição; Solos ornitogênicos; Solos - Ilha da Trindade; Solos - Antártica; Geomorphology; Soils - Composition; Ornithogenic soil; Soils - The Trindade Island; Soils - Antartic; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO

The Trindade Island and Antarctica have volcanic soils and very variable lithology, and in both stretches are fertilized with waste of endemic and migratory seabirds that occurs in its territories, where adapted plant species to these conditions occur. The study of vegetation and soil or surface substrates at different sites on the Trindade Island and Antarctic, tried to estimate the potential yield of dry matter of aerial part per unit area of the mentioned species, as well as changes in the levels of accumulated minerals, the efficiency of nutrients utilization by plants, and the most limiting factors for higher yields. Relations between the mineral compositions of plants and soil characteristics / associated substrates were also studied. Differences were found in productivity, accumulation, efficiency utilization and mineral balance among species, and among the same species occurring at different sites. Antarctic species of higher plants tend to accumulate more nutrients such as N and P, and Trinidade, however, are more productive. Still, for the Trindade Island estimated the stock of organic carbon ( EC ) for the soils of the island, in addition, soil samples collected had their fractionated humic substances and subjected to the degradation of constituents related studies increasing temperature . Soils with ornithogenics attributes presented with the highest predicted EC and, with the increased temperature, many soil samples lost more than the forms of organic carbon were detected in the analysis.