Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T13:04:51Z No. of bitstreams: 2 diego_faustolo_alves_bispo.pdf: 4358144 bytes, checksum: c31dd0a5e7a197ab14657a12c115ae66 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T13:05:17Z (GMT) No. of bitstreams: 2 diego_faustolo_alves_bispo.pdf: 4358144 bytes, checksum: c31dd0a5e7a197ab14657a12c115ae66 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T13:05:35Z (GMT) No. of bitstreams: 2 diego_faustolo_alves_bispo.pdf: 4358144 bytes, checksum: c31dd0a5e7a197ab14657a12c115ae66 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2014-12-23T13:05:35Z (GMT). No. of bitstreams: 2 diego_faustolo_alves_bispo.pdf: 4358144 bytes, checksum: c31dd0a5e7a197ab14657a12c115ae66 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2013 / As turfeiras s?o importantes reguladores dos fluxos de ?gua e de elementos, principalmente do carbono, entre os compartimentos terrestres e aqu?ticos. O objetivo deste trabalho foi caracterizar qualiquantitativamente os Organossolos e os recursos h?dricos das turfeiras das cabeceiras do Rio Ara?ua? quanto ? disponibilidade h?drica e a din?mica do carbono no sistema solo-?gua. Coletou-se oito testemunhos representantes de quatro perfis de solo do Campo Limpo ?mido e Floresta Estacional Semidecidual de duas turfeiras nas cabeceiras de afluentes do Rio Ara?ua? (C?rrego Cachoeira dos Borges e Rio Preto), descritos e caracterizados f?sica, qu?mica, elementar e morfologicamente. Em tr?s pontos do curso d??gua de cada afluente e duas ?pocas (chuvosa e seca) foram coletadas amostras de ?gua e analisados os seus atributos f?sicos e qu?micos. Procedeu-se o mapeamento das turfeiras e o c?lculo dos volumes e fluxos de ?gua e de carbono. Empregou-se an?lise de vari?ncia para atestar o efeito das fitofisionomias, profundidades de amostragem e das intera??es destes fatores sobre as vari?veis do solo. Para os atributos da ?gua atestaram-se efeitos dos locais (afluentes), ?pocas de amostragem e das intera??es entre estes fatores. Boa parte dos atributos caracterizadores da mat?ria org?nica e a composi??o elementar do solo apresentaram diferen?as significativas entre os locais, fitofisionomias e profundidades de amostragem e variaram em fun??o da composi??o e grau de evolu??o do material org?nico. A maioria dos atributos f?sico-qu?micos das ?guas n?o diferenciou entre os locais e nem entre as ?pocas, mas foram influenciados pelos atributos dos Organossolos de onde se originam. A turfeira do Rio Preto estoca 4.299,39 t de C (206,70 t ha-1) e 227.258,15 m3 de ?gua (10.925,87 m3 ha-1) e a turfeira do C?rrego Cachoeira dos Borges estoca 14.781,09 t de C (184,10 t ha-1) e 745.950,30 m3 de ?gua (9.290,70 m3 ha-1). A vaz?o do Rio Preto foi de 0,023 m3 s-1 e do C?rrego Cachoeira dos Borges foi de 0,067 m3 s-1 no per?odo chuvoso. No per?odo seco estes cursos d??gua apresentaram vaz?o m?nima constante, demonstrando a capacidade das turfeiras de suas cabeceiras de perenizar a vaz?o. Estimou-se o lan?amento de uma carga m?dia de 360,84 t ano-1 de N e 6.812,73 t ano-1 de C e de 917,32 t ano-1 de N e 33.516,16 t ano-1 de C, respectivamente para o Rio Preto e C?rrego Cachoeira dos Borges. As turfeiras das cabeceiras dos afluentes do Rio Ara?ua? influenciam significativamente na vaz?o e na qualidade de suas ?guas, sendo urgente a necessidade de preserva??o destes pedoambientes. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT The peatlands are important regulators of water flows and elements between terrestrial and aquatic compartments, especially of the carbon. The objective of this study was to characterize qualitatively and quantitatively the Histosols and water resources of headwater from peatlands of the Rio Ara?ua? as to hydric availability and carbon dynamics in the soil-water system. Been collected eight testimonies representatives from four soil profiles of moist meadow and semi-deciduous seasonal forest in two peatlands in the headwaters of affluents of the Rio Ara?ua? (C?rrego Cachoeira dos Borges e Rio Preto), described and characterized physics, chemistry, elementary and morphologically. In three points of each watercourse affluent and two seasons (wet and dry) water samples were collected and analyzed their physical and chemical attributes. Been done the mapping of peatlands and the calculation of volumes and flows of water and carbon. It was used analysis of variance to attested effect of vegetation types, sampling depths and the interactions of these factors over soil variables. For the attributes of water attested effects of local (affluents), sampling periods and the interactions between these factors. Much of the attributes that characterize the organic matter and elemental composition of the soil, showed significant differences between the sites, vegetation types and depths of sampling and varied according to the composition and degree of evolution of the organic material. Most physical and chemical attributes of the water did not differ between the sites and between sampling periods, but were influenced by the attributes of the Histosols of where they originate. The peatland from Rio Preto stocks 4,299.39 tons of C (206.70 tons ha-1) and 227,258.15 m3 (10,925.87 m3 ha-1) of water and peatland from the C?rrego Cachoeira dos Borges stocks 14,781.09 tons of C (184.10 tons ha-1) and 745.950,30 m3 (9.290,70 m3 ha-1) of water. The flow of water of the Rio Preto was 0.023 m3 s-1 and of the C?rrego Cachoeira dos Borges was 0.067 m3 s-1 in the rainy season. These watercourses showed constant minimum flow in the dry season, demonstrating the capacity of peatlands its headwaters to maintain water flow. It has been estimated the launch of a load average of 360.84 tons year-1 of N and 6812.73 tons year-1 of C and of 917.32 tons year-1 of N and 33516.16 tons year-1 of C respectively for the Rio Preto and C?rrego Cachoeira dos Borges. The peatlands from the headwaters of the affluents of the Rio Ara?ua? have a significant influence the flow and quality of its waters, and the urgent need to preservation these pedological environments.