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Unravelling the sources and sinks of nitrous oxide (N2O) in sustainable bio-based agriculture

Grant number: 13/50940-0
Support type:Program for Research on Bioenergy (BIOEN) - Regular Program Grants
Duration: August 01, 2014 - January 31, 2017
Field of knowledge:Agronomical Sciences - Agronomy
Cooperation agreement: BE-BASIC Consortium
Principal Investigator:Janaina Braga Do Carmo
Grantee:Janaina Braga Do Carmo
Principal investigator abroad: Eiko Eurya Kuramae
Institution abroad: Royal Netherlands Academy of Arts and Sciences, Netherlands
Home Institution: Centro de Ciências e Tecnologias para a Sustentabilidade (CCTS). Universidade Federal de São Carlos (UFSCAR). Sorocaba , SP, Brazil

Abstract

One of the main concerns of biomass production for bio-energy is the potential positive feedbacks of crop production to global change, particularly in the form of greenhouse gas emissions (CH4, CO2, N2O - GHGs). Nitrous oxide (N2O) is a significant by-product of agricultural intensification, primarily due to the application and transformation of inorganic Nitrogen (N) fertilizers. In our previous and ongoing studies with sugarcane crop we have observed that not only nitrogen fertilizer in soil increases N2O emissions but also the combination of N and vinasse (by-product of ethanol). Soil microorganisms are central to these transformations and thus regulate the loss or retention of inorganic N, including N2O. Biological emissions of N2O are mainly controlled by two microbial processes: nitrification and denitrification. However, we have limited understanding of how these processes are regulated in complex systems such as soils under crops for bio-energy. Prior work has often focused on individual microbial species that contribute to each process and on ecosystem scale parameters such as organic matter content, soil texture, pH, soil N status and precipitation. What is lacking is an approach that combines fine scale mechanistic details on the physiology of key functional groups of the N cycling microbial community and their interaction with their environment and each other. Our goal is to combine advanced omic technologies (meta-genomics, -transcriptomics and - proteomics) to determine the key players in the biogeochemical cycling of N, with a specific focus on organisms involved in denitrification in a model of sustainable sugarcane biomass production system. (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)
CIPRIANO, MATHEUS A. P.; SULEIMAN, AFNAN K. A.; DA SILVEIRA, ADRIANA P. D.; DO CARMO, JANAINA B.; KURAMAE, EIKO E. Bacterial community composition and diversity of two different forms of an organic residue of bioenergy crop. PeerJ, v. 7, APR 18 2019. Web of Science Citations: 0.
PITOMBO, LEONARDO M.; RAMOS, JULIANA C.; QUEVEDO, HELIO D.; DO CARMO, KARINA P.; PAIVA, JANE M. P.; PEREIRA, ELISABETE A.; DO CARMO, JANAINA B. Methodology for soil respirometric assays: Step by step and guidelines to measure fluxes of trace gases using microcosms. METHODSX, v. 5, p. 656-668, 2018. Web of Science Citations: 1.

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