High Application Rates of Biochar to Mitigate N2O Emissions From a N-Fertilized Tropical Soil Under Warming Conditions

Author(s)

Rittl, Tatiana F. ^{[1, 2]} ; Oliveira, Dener M. S. ^{[1, 3]} ; Canisares, Luiza P. ^[1] ; Sagrilo, Edvaldo ^[4] ; Butterbach-Bahl, Klaus ^[5] ; Dannenmann, Michael ^[5] ; Cerri, Carlos E. P. ^[1]

Affiliation

^[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Soil Sci Dept, Piracicaba - Brazil

^[2] Norwegian Ctr Organ Agr, Tingvoll - Norway

^[3] Fed Inst Goiano, Multiuser Lab Nat Sci, Posse - Brazil

^[4] Brazilian Agr Res Corp Embrapa Meio Norte, Teresina - Brazil

^[5] Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Atmospher Envkonmentai Res IMK IFU, Garmisch Partenkirchen - Germany

• Document type: Journal article
• Source: FRONTIERS IN ENVIRONMENTAL SCIENCE; v. 8, JAN 13 2021.
• Web of Science Citations: 0

Abstract

Biochar application has been suggested as a strategy to decrease nitrous oxide emissions from agricultural soils while increasing soil C stocks, especially in tropical regions. Climate change, specifically increasing temperatures, will affect soil environmental conditions and thereby directly influence soil N2O fluxes. Here, we show that Miscanthus giganteus biochar applied at high rates suppresses the typical warming-induced stimulation of N2O emissions. Specifically, in experiments with high biochar addition (25 Mg ha(-1)), N2O emissions under 40 degrees C were equal to or even lower compared to those observed at 20 degrees C. In this sense, the mitigation potential of biochar for N2O emissions might increase under the auspices of climate change. (AU)

• FAPESP's process: 15/10108-9 - Effect of biochar application on the carbon stock and fertility of the soil under laboratory and tropical field conditions
• Grantee: Tatiana Francischinelli Rittl
• Support Opportunities: Scholarships in Brazil - Post-Doctoral