Fluxos e teores de nutrientes em Agroecossistemas de produtores rurais em descapitalização

• Ano de defesa: 2017
• Autor(a) principal: Cunha, Isabel Maria de Lima
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Sistemas de produção; Sustentabilidade; Autoconsumo
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/30942

The technological development in the agricultural sector, in order to increase food production, promoted the increase of social inequality in the rural sector, due to the raising of the financial cost of these technologies and consequent low accessibility of them by decapitalized family farmers. It is likely that this poverty will have great impact on the local sustainability of communities and families, as well as on the conservation of soils and natural resources, and it is necessary to understand the relationships between the ecological, technical and social facts that explain the reality. In this sense, the main objective of this work is to analyze the relation of the socioeconomic condition of the farmer from the flows and nutrient stocks in the production systems and subsystems. The study was conducted in Pentecoste-CE through the identification of nutrient flux maps in the systems and subsystems of production and evaluation of soil nutrient stocks in the field, including the analysis of the relationship of these factors and the same with the socioeconomic level of Producers. The categorization of the producers regarding the socioeconomic level was based on primary data of a master's dissertation held in the municipality of Pentecoste and random sampling through semi-structured interviews. The determination of the material flows was carried out by surveying the entrances and exits of products or residues in the production systems. The nutrient fluxes were determined from the material flows in the production systems and the mineral content in each material, obtained from a bibliographic review and the evaluation of the nutrient stocks in the soil was done through the collection of soil samples and Laboratory analysis of macronutrients (phosphorus, potassium, calcium and magnesium). The mapping of nutrient fluxes was performed through the STAN® computer program and multiple correlations were established between social, technical, economic variables, flows and soil nutrient stocks to identify the relationships between them. The results indicated that producers with economic problems do not invest in maintaining soil fertility and that the higher the agricultural income, cultivated area and workforce, the greater are the annual balances of nutrients in the soil. However, no significant correlation of socioeconomic variables with soil macronutrient levels was found.