Organic matter dynamics under the influence of land use change: effects on dissolved organic carbon

• Grant number: 19/17576-9
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: November 01, 2020
• End date: January 31, 2023
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Carlos Eduardo Pellegrino Cerri
• Grantee: Rafael Silva Santos
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Associated scholarship(s): 21/07676-6 - Predicting land-use change impacts on soil organic matter dynamics in the Matopiba region, BE.EP.DR

Abstract

The land use change and intensification of production systems may lead to soil Carbon (C) loss. The use of agricultural practices that contribute to the conservation and increase of soil C levels are strategic for the development of a sustainable agriculture. This project aims to evaluate the impacts of land use change on the quality and quantity of Soil Organic Matter (SOM) in areas of native vegetation converted to no-tillage and conventional planting in the MATOPIBA region, considered the last agricultural frontier in Brazil. The work will be carried out in the localities of Balsas - MA, Gurupi - TO, Baja Grande do Ribeiro - PI and Luís Eduardo Magalhães - BA. The soil will be sampled at nine points for each use up to 1 m depth. The total contents of C, Nitrogen (N) and Dissolved Organic C (DOC) will be determined through elemental analyzer. The C and N stocks will be quantified and adjusted to an equivalent soil mass. Biochemical changes in SOM will be evaluated through the techniques of pyrolysis coupled to gaseous chromatograph/mass spectrometer and laser-induced fluorescence; biochemical changes in DOC will be evaluated using spectroscopic techniques in the visible and infrared wavelength. At the end, the data will be integrated using multivariate statistics aiming a descriptive interpretation of the data. It is expected to quantify and predict the impacts generated in the SOM and DOC due to the change in land use and management, in order to improve the agricultural practices that have been used and minimize the impacts of agriculture on the dynamics of the C in the MATOPIBA region. (AU)

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)

SANTOS, RAFAEL S.; WIESMEIER, MARTIN; CHERUBIN, MAURICIO R.; OLIVEIRA, DENER M. S.; LOCATELLI, JORGE L.; HOLZSCHUH, MARQUEL; CERRI, CARLOS E. P.. onsequences of land-use change in Brazil's new agricultural frontier: A soil physical health assessmen. Geoderma, v. 400, OCT 15 2021. (19/27378-0, 19/17576-9)

SANTOS, RAFAEL S.; WIESMEIER, MARTIN; OLIVEIRA, DENER M. S.; LOCATELLI, JORGE L.; BARRETO, MATHEUS S. C.; DEMATTE, JOSE A. M.; CERRI, CARLOS E. P.. Conversion of Brazilian savannah to agricultural land affects quantity and quality of labile soil organic matter. Geoderma, v. 406, JAN 15 2022. (19/17576-9, 19/27378-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SANTOS, Rafael Silva. Soil organic matter dynamics and physical quality changes associated with the agricultural expansion in the Matopiba region, Brazil. 2023. Doctoral Thesis - Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) Piracicaba.