Aplicação de efluente de tratamento de esgoto, via aspersão, no solo e em Brachiaria

• Ano de defesa: 2015
• Autor(a) principal: Santos, Gilmar Oliveira [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Fertirrigação; Aguas residuais; Forragem; Águas residuais no solo; Aguas residuais como fertilizantes; Sewage
• Link de acesso: http://hdl.handle.net/11449/128134; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/17-09-2015/000849681.pdf

The use of treated sewage effluent (TSE) in agronomic favors the increased productivity and forage quality, besides the expansion of irrigated areas in a sustainable way, even in regions that have the right to use the already restricted water. The objectives of this study were to evaluate the effect of applying sewage treatment effluent by conventional sprinkler irrigation, on soil and on Brachiaria brizantha cv. Marandu cultivation during the years 2013 and 2014 in Jaboticabal, SP, Brazil. Was used a sprinkler system with three lateral rows and uniform water depth, but gradual TSE, in six treatments with four replicates, to apply the following TSE fractions in water: E5 = 1.0, E4 = 0 87, E3 = 0.6, E2 = 0.31, E1 = 0,11, and E0 = 0.0. From February 2013 to January 2015 were evaluated 26 forage crops, and analyzed the productivity and forage quality (crude protein, neutral detergent fiber, macro and micronutrients), plant height and the relationship leaf-thatched in different treatments. Were also conducted soil analysis, soil solution and TSE throughout the experiment driving time. Beyond the scheduled analysis was determined the rate of animal lease and analyzed the correlation between normalized difference vegetation index (NDVI) and forage yield. The ETE of TSE from Jaboticabal contained low concentrations of nitrogen (53.7 ± 7.6 mg L-1), sodium (54.8 ± 9.5 mg L-1), potassium (16.6 ± 2.1 mg L-1), calcium (14.0 ± 1.6 mg L-1), magnesium (5.0 ± 1.0 mg L-1), phosphorus (0.9 ± 0.3 mg L-1), sodium adsorption ratio (3.3 ± 0.6) and electrical conductivity (0.46 ± 0.01 dS m-1) with low potential for salinization and sodification classified as C2S1. After 24 months of trial, application of effluent provided to 1,132 kg ha-1 yr-1 of nitrogen and up to 464 kg ha-1 yr-1 potassium, and other macronutrients and micronutrients essential for nutrition of forage. Equivalent concentrations of nitrogen, phosphorus and potassium in the treatment ...