Application of Solid Waste From Industry in Pasture, as a Destination Alternative

• Published in: Communications in Soil Science and Plant Analysis 2021-09, Vol.52 (16), p.1912-1926
• Main Authors: Schlichting, Alessana Franciele, Bonfim-Silva, Edna Maria, José Araújo da Silva, Tonny
• Format: Article
• Language: English
• Subjects: Ash; Ashes; Biological fertilization; Biomass burning; Fertilization; Hardwoods; Industrial wastes; Nitrogen; Nutrition; Nutrition assessment; Pasture; Pasture degradation; Phosphorus; Potassium; Recovery; Sandy soils; Soil; Soil surfaces; Solid wastes; Topsoil; use of waste; waste management; Wood; wood ash
• ISSN: 0010-3624; 1532-2416; 1532-4133
• DOI: 10.1080/00103624.2021.1900227

The destination of industrial waste from the combustion of vegetal biomass, wood ash, has become an environmental problem in many countries. Therefore, finding viable alternatives for its reuse is necessary. The objective of this study was to verify the effect of wood ash doses and application managements on accumulation, recovery efficiency, and nutrition index of nitrogen (N), phosphorus (P), and potassium (K) for pasture recovery. The experiment was performed in Brazil, in a strip-plot design in 6 × 2 factorial scheme, which corresponded to six wood ash doses (0, 3, 6, 9, 12 and 15 Mg ha −1 ) and two wood ash application managements (surface - without incorporation; incorporated - incorporated to the soil with light harrow), with four replicates, in two years of evaluation. The application of the vegetal ash optimized up to 100% the nitrogen fertilization, besides, it provides significant values of phosphorus and potassium for pasture recovery, with the application of topsoil to the pasture recovery. The reuse of this solid waste on pasture has proved to be a viable alternative to two serious problems, one that is the environmentally and financially viable destination of this solid waste and the other is the recovery of pasture at low cost. For sandy soils, in the study region, annual application of wood ash doses between 13 and 15 Mg ha −1 is indicated, with the addition of 100 kg ha −1 of N, both applied to the soil surface.