Chemical changes in the soil and production of oat fertilized with treated wastewater

  • Paulo Fortes Neto Programa de Pós-graduação em Ciências Ambientais, UNITAU
  • Paula Guimarães Almeida Veiga Secretaria de Educação do Estado de São Paulo
  • Nara Lúcia Perondi Fortes Programa de Pós-graduação em Ciências Ambientais, UNITAU
  • Marcelo dos Santos Targa Programa de Pós-graduação em Ciências Ambientais, UNITAU
  • João Luiz Gadioli Departamento de Ciências Agrárias, UNITAU
  • Plinio Honorato Muella Peixoto Departamento de Ciências Agrárias, UNITAU
Keywords: wastewater, soil disposition, water reuse

Abstract

The purpose of this project was to ensure the quality and impact of the application of treated sewage wastewater on the chemical properties of Dystrophic Yellow Argisol and on biomass and grain production of white oat (Avena sativa, L). After the wastewater was chemically characterized, it was applied to the soil in concentrations of 0, 30, 60 and 90 m3 ha-1 in plots of 200 m2. Doses of water were compared with mineral fertilizer doses recommended for oat. The experimental design was a split plot with four randomized blocks. The wastewater had chemical qualities useful for grain cultivation. The values of calcium, CTC, V, pH increased and acidity potential decreased in the soil after the wastewater was applied. Doses of the wastewater provided increments in biomass production and oat grains similar to that obtained with chemical fertilizers. We conclude that wastewater can be used to correct soil acidity and replace or supplement chemical fertilizers.

Published
19/08/2014
Section
Special