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Organic matter and greenhouse gases emissions in no-tillage systems

Grant number: 09/16060-7
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): November 01, 2010
Effective date (End): October 31, 2013
Field of knowledge:Agronomical Sciences - Agronomy - Crop Science
Principal Investigator:Ciro Antonio Rosolem
Grantee:Juliano Carlos Calonego
Host Institution: Faculdade de Ciências Agronômicas (FCA). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil


Agricultural practices contribute with greenhouse gases emissions, so there is interest in identify cropping systems able to increase soil organic carbon (SOC) accumulation, and to promote the maintenance of stable MO. The objective of this work will be to study the C sequestration and C and N stocks in the soils, in no-tillage systems (NT), relating with the quality of organic matter accumulated. The study will be carried out in two areas under NT for at least eight years, with different crops rotations, in Botucatu, state of São Paulo, Brazil. In the soil, it will be analyzed the organic matter quality, through physical and chemical fractionation, and the total and inorganic N levels, and C and N microbial biomass levels. The physical soil conditional will be analysis through of: bulk density, particle density, porosity and aggregate stability. The straw on the soil will be evaluated periodically to determine dry matter, nutrients levels, C/N relation, and the levels of lignin, cellulose, hemicellulose and soluble carbohydrates. The fluxes of CO2, N2O and CH4 from soil will be determined twice a year, with a collect in July and other in January. The aim is to identify between different crops rotations which have a positive balance in C accumulation in the soil and recommend species and management that will help to mitigate the greenhouse effect. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
GONSIORKIEWICZ RIGON, JOAO PAULO; CALONEGO, JULIANO CARLOS; ROSOLEM, CIRO ANTONIO; LA SCALA, JR., NEWTON. Cover crop rotations in no-till system: short-term CO2 emissions and soybean yield. Scientia Agricola, v. 75, n. 1, p. 18-26, . (09/16060-7, 11/15361-3)

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