Qualidade dos solos nas áreas de nascentes do alto curso do rio Piauitinga, Lagarto - SE

• Autor(a) principal: Magalhães, Leila Thaís Soares
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFS
• Texto Completo: https://ri.ufs.br/handle/riufs/6610
• topic: Análise química; Análise física; Análise microbiológica; Bacia hidrográfica; Nascentes; Rio Piauitinga (SE); Chemical analysis; Physical analysis; Microbiological; River basin; Springs; River Piauitinga (SE); CNPQ::CIENCIAS AGRARIAS::AGRONOMIA

The basin of the river Piauitinga is located in south-central portion of the state of Sergipe, being responsible for water supply in some municipalities Sergipe, which did not avoid the areas around the springs, framed as environmental protection (as forestry code ) are almost in its entirety cleared. Thus, this study seeks to characterize the soils in their local environment to serve as a benchmark for future comparisons between areas of nascent and degraded in the process of recovery and assess physical attributes, chemical and microbiological soil around the springs of this river for more understanding the dynamics of semi-physical. The sources were classified as its recharge and about their conservation status. We selected the areas for revegetation of each source and these were grouped according to their position in the landscape. The environmental and pedological characteristics of the study sites was performed by observing the local landscape, the opening of micro-trenches and tradagens soil. The soils were described and classified morphologically. Slides were prepared for x-ray diffraction of clay. Could a group of springs according to their positions of landscape and local soil characteristics below (BA), with slope horizon A (EA), slope without horizon A (ES), with slope hydromorphic (EH) and foothills of gentle slope (SE). The attributes were analyzed in samples at depths of 0 to 0.1 m and 0.1 to 0.3 m. Were determined: texture, organic particulate matter, stability of macro aggregates, mean diameter of aggregates, the value of color, pH, organic C, Ca, Ca + Mg, Mg, Al, Na, K, P, H + Al, N, sum of bases, cation exchange capacity, base saturation, Al saturation of, microbial respiration, C and N microbial biomass and enzyme activity (FDA). The similarity and / or dissimilarity among sites (spatial) was investigated by multivariate analysis "non-metric multidimensional scaling (NMS), from the distance of Sorensen. Were determined by Pearson's correlation coefficients between the axes of the NMS ordination by and between the different attributes. The sites around the headwaters of the River High Piauitinga positions are distributed in erosicionais (breaking-of-focus), and download a single case of foot gentle slope of the top of coastal tablelands. Its main features are the strong hydromorphic (Gleissolos Cambisols and Haplic Gleissolos), and / or the low level of development (Cambisols and Haplic Plinthosols, both with much skeletal material - quartz and petroplinthite - many with eroded phase). The physical, chemical and biological studied by means of multivariate analysis allowed the construction of an environmental gradient, with decreasing quality of soil in the sequence: BA, EH, EA and ES. It is believed that it is possible redefinitions of strategies for the revegetation of the upper course of the spring basin, extrapolate soil quality in areas of springs of water bodies with similar characteristics and reflect on strategies for restoring degraded areas.