Antagonistic interaction between biochar and nitrogen addition on soil greenhouse gas fluxes: A global synthesis
Yanghui He,
Yixian Yao,
Zhen Jia,
Xinyue Chen,
Lingyan Zhou,
Junjiong Shao,
Ruiqiang Liu,
Guiyao Zhou,
Yuling Fu,
Xiaoying Sun,
Xuhui Zhou,
Shahla Hosseini Bai
Affiliations
Yanghui He
Center for Global Change and Ecological Forecasting Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco‐Restoration School of Ecological and Environmental Sciences East China Normal University Shanghai China
Yixian Yao
Center for Global Change and Ecological Forecasting Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco‐Restoration School of Ecological and Environmental Sciences East China Normal University Shanghai China
Zhen Jia
Center for Global Change and Ecological Forecasting Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco‐Restoration School of Ecological and Environmental Sciences East China Normal University Shanghai China
Xinyue Chen
Center for Global Change and Ecological Forecasting Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco‐Restoration School of Ecological and Environmental Sciences East China Normal University Shanghai China
Lingyan Zhou
Center for Global Change and Ecological Forecasting Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco‐Restoration School of Ecological and Environmental Sciences East China Normal University Shanghai China
Junjiong Shao
Center for Global Change and Ecological Forecasting Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco‐Restoration School of Ecological and Environmental Sciences East China Normal University Shanghai China
Ruiqiang Liu
Center for Global Change and Ecological Forecasting Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco‐Restoration School of Ecological and Environmental Sciences East China Normal University Shanghai China
Guiyao Zhou
Center for Global Change and Ecological Forecasting Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco‐Restoration School of Ecological and Environmental Sciences East China Normal University Shanghai China
Yuling Fu
Center for Global Change and Ecological Forecasting Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco‐Restoration School of Ecological and Environmental Sciences East China Normal University Shanghai China
Xiaoying Sun
Center for Global Change and Ecological Forecasting Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco‐Restoration School of Ecological and Environmental Sciences East China Normal University Shanghai China
Xuhui Zhou
Center for Global Change and Ecological Forecasting Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco‐Restoration School of Ecological and Environmental Sciences East China Normal University Shanghai China
Shahla Hosseini Bai
Centre for Planetary Health and Food Security School of Environment and Science Griffith University Nathan Qld Australia
Abstract Both biochar and nitrogen (N) addition have been proposed for enhancing plant productivity and increasing carbon (C) sequestration. Although numerous studies have been conducted to examine responses of soil greenhouse gas (GHG) fluxes to biochar or N addition, biochar is often co‐applied with N fertilizer and the interactive effects of the two factors still remain unclear. In this study, we performed a meta‐analysis of manipulative experiments with 267 two‐factor observations to quantify the main and interactive effects of biochar and N addition on soil GHG fluxes at a global scale. Our results showed that biochar addition significantly increased soil CO2 emission by 10.1%, but decreased N2O emission by 14.7%. Meanwhile, N addition increased both soil CO2 and N2O emissions by 11.6% and 288%, respectively. The combination of biochar and N addition also exhibited significant positive effect on CO2 (+18.0%) and N2O (+148%) emissions, but there were non‐significant changes in CH4 fluxes. Consequently, antagonistic interaction between biochar and N addition was observed in soil GHG fluxes and their global warming potential (GWP), except for CH4 uptake showing an additive interaction. This synthesis highlights the importance of the interactive effects between biochar and N addition, providing a quantitative basis to develop sustainable strategies toward widespread application of biochar to preserve cropping system and mitigate climate change.
