Utilização de resíduos de tratamento de esgoto como suprimento hídrico e nutricional na cultura do girassol

• Ano de defesa: 2015
• Autor(a) principal: Lima, Rodollpho Artur de Souza [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Girassol - Adubação; Lodo de esgoto; Agua - Reutilização; Minerais na nutrição de plantas; Nitrogenio na agricultura; Nitrogen in agriculture
• Link de acesso: http://hdl.handle.net/11449/126563; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/10-08-2015/000844767.pdf

The use in municipal waste agriculture present immeasurable environmental benefits with the use of waste water and the organic material generated by sewage treatment plants, as well as reduce costs with chemical fertilizers due to the return of the elements to its biogeochemical cycle and the reduction of environmental damage from landfills. The study aimed to evaluate the use of waste sewage treatment as hydrous (wastewater) and nutritional (sewage sludge as a partial substitute, complete and in higher dose than conventional nitrogen fertilizer) supply in sunflower cultivation. The study was conducted in a greenhouse at the experimental area of the Department of Soil and Environmental Resources of Agricultural Sciences Faculty belonging to Universidade Estadual Paulista Julio de Mesquita Filho (FCA / UNESP), Botucatu - SP. The statistical design was completely randomized in a split plot arrangement. In each plot a type of irrigation water (wastewater and water supply) was used, and the subplots received seven levels of nitrogen fertilization, a total of 14 treatments with 10 repetitions. The treatments were: T0 (no nitrogen fertilization); T1 - (100% mineral nitrogen fertilization); T2 (50% mineral nitrogen fertilizer 50% more nitrogen fertilizer from the composted sewage sludge), and T3 treatments, T4, T5 and T6 corresponded to 100, 150, 200 and 250% of the nitrogen fertilizer from sewage sludge composted, respectively. Irrigation with wastewater provided an increase in most variables due to the chemical characteristics of the treated sewage effluent, especially in relation to N. For productive characteristics T4 (150% of composted sewage sludge) in conjunction with wastewater raised averages, providing higher yields. It found that increasing doses of sewage sludge compost in the soil provided significant increases, particularly of Zn in the leaves and sunflower seeds. It was observed in this ...