AUTHOR=Rittl Tatiana F. , Oliveira Dener M. S. , Canisares Luiza P. , Sagrilo Edvaldo , Butterbach-Bahl Klaus , Dannenmann Michael , Cerri Carlos E. P. 

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

JOURNAL=Frontiers in Environmental Science

VOLUME=8

YEAR=2021

URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2020.611873

DOI=10.3389/fenvs.2020.611873

ISSN=2296-665X

ABSTRACT=<p>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 N<sub>2</sub>O fluxes. Here, we show that <italic>Miscanthus giganteus</italic> biochar applied at high rates suppresses the typical warming-induced stimulation of N<sub>2</sub>O emissions. Specifically, in experiments with high biochar addition (25 Mg ha<sup>−1</sup>), N<sub>2</sub>O emissions under 40°C were equal to or even lower compared to those observed at 20°C. In this sense, the mitigation potential of biochar for N<sub>2</sub>O emissions might increase under the auspices of climate change.</p>