|Support type:||Scholarships in Brazil - Scientific Initiation|
|Effective date (Start):||August 01, 2012|
|Effective date (End):||July 31, 2013|
|Field of knowledge:||Agronomical Sciences - Agronomy - Soil Science|
|Principal Investigator:||Leonardo Theodoro Bull|
|Grantee:||Gustavo Ferreira Brandão|
|Home Institution:||Faculdade de Ciências Agronômicas (FCA). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil|
The use of no-tillage has become widespread in Brazil, ensuring more sustainable production. In this system, the maintenance of surface residues and does not cause soil disturbance, over the years, chemical changes, physical and biological characteristics that affect the dynamics of nutrients in the soil. The recycling of waste in agricultural soils is one of the most rational use of these materials as a source of nutrients and improve soil characteristics, provided that health and environmental criteria met. Such waste may be of urban origin, such as sewage sludge and industrial origin, such as steelmaking slag or waste from pulp and paper industries. The application in no tillage contributes to further increase the organic matter content of soils, whose action complexing reduces the risk of contamination with metals from these materials. Aiming to combine the benefits of the system of soil management with tillage and application of sewage sludge and industrial waste into the soil under long-term experiment, the project aims to analyze the chemical changes in soil and plant oats after the application of sewage sludge, lime sludge and steel slag in Tillage System. This is work that has been conducted for ten years, and until now there were five applications of such waste: 2002, 2005, 2007, 2009 and 2011. The experimental design is a randomized block design with four replications. The treatments consist of four residues, two sewage sludge (centrifuged and digester) and two industrial waste (steel slag and lime mud) at doses of 0, 2, 4 and 8 Mg ha-1. Fractionated through a characterization of the soil profile will be analyzed soil chemical characteristics, biomass production of oat and leaf nutrient content.