Viabilidade economica da utilização de lodo de esgoto na substituição da adubação química nitrogenada

• Ano de defesa: 2019
• Autor(a) principal: Rodrigues, Jeniffer de Sousa Bogdanavicius
• Orientador(a): Lobo, Thomaz Figueiredo
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade do Sagrado Coração
• Programa de Pós-Graduação: Ciência e Tecnologia Ambiental
• Departamento: Ciências da Saúde e Biológicas
• País: Brasil
• Palavras-chave em Português: Custos; Meio ambiente; Plantio direto; Receitas; Sustentabilidade; Costs; Environment; Direct planting; Revenue; Sustainability
• Área do conhecimento CNPq: CIENCIAS EXATAS E DA TERRA
• Link de acesso: https://tede2.usc.br:8443/handle/tede/436

The use of composted sludge in the soil in a suitable way will have less accumulation of this residue in the landfills and consequently the reduction of the cost of depositing it in landfills. The objective of this work was to analyze the economical viability of the use of sewage sludge in the substitution of chemical nitrogen fertilizers through calculations and analysis of economic viability in agricultural crops that have already obtained productivity results with previous experiments in their use. They were worked on the following crops: sunflower, oats, beans, wheat and triticale. This essay was carried out at the Experimental Farm of the Faculty of Agronomic Sciences of Botucatu in the municipality of Sao Manuel. The experimental design of these experiments was as follows: T0 - without N; T1 - 100% of the need for N urea; T2 - 50% N from the sewage sludge and 50% from the mineral form; T3 - 100% N organic compound; T4 - 150% N organic compound; T5 - 200% N organic compound. The parameters for the evaluation of economic viability were Gross Margin (CTP), Leveling Point (CTP), Operating Profit and Profitability Index. By changing the urea by the LE, the crops of oats, beans and sunflower were economically feasible in all analyzed treatments, even with the cost of freight to use the LE achieved a return to the producers. The triticale crop did not present economical viability, due to the low cost of raw material and high yield of grains. As for wheat, only treatments T1, T2 and T5 obtained economic viability.