| Title | Deceleration of Cropland-N2O Emissions in China and Future Mitigation Potentials |
| Authors | Cui, Xiaoqing Shang, Ziyin Xia, Longlong Xu, Rongting Adalibieke, Wulahati Zhan, Xiaoying Smith, Pete Zhou, Feng |
| Affiliation | Peking Univ, Coll Urban & Environm Sci, Sino France Inst Earth Syst Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100871, Peoples R China Karlsruhe Inst Technol, Inst Meteorol & Climate Res IMK IFU, D-82467 Garmisch Partenkirchen, Germany Oregon State Univ, Forest Ecosyst & Soc, Corvallis, OR 97331 USA Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Agr Clean Watershed Res Grp, Beijing 100081, Peoples R China Univ Aberdeen, Inst Biol & Environm Sci, Aberdeen AB24 3UU, Scotland |
| Keywords | GREENHOUSE-GAS EMISSIONS NITROUS-OXIDE EMISSIONS CLIMATE-CHANGE N2O EMISSIONS FOOD MANAGEMENT NUTRIENT EUROPE HEALTH MAIZE |
| Issue Date | 5-Apr-2022 |
| Publisher | ENVIRONMENTAL SCIENCE & TECHNOLOGY |
| Abstract | Agricultural soils are the largest anthropogenic emission source of nitrous oxide (N2O). National agricultural policies have been implemented to increase crop yield and reduce nitrogen (N) losses to the environment. However, it is difficult to effectively quantify crop-specific and regional N2O mitigation priorities driven by policies, due to lack of long-term, high-resolution crop-specific activity data, and oversimplified models. Here, we quantify the spatiotemporal changes and key drivers of crop-specific cropland-N2O emissions from China between 1980 and 2017, and future N2O mitigation potentials, using a linear mixed-effect model and survey-based data set of agricultural management measures. Cropland-N2O emissions from China tripled from 102.5 to 315.0 Gg N yr(-1) between 1980 and 2017, and decelerated since 1998 mainly driven by country-wide deceleration and decrease in N rate and the changes in sowing structure. About 63% of N2O emissions could be reduced in 2050, primarily in the North China Plain and Northeast China Plain; 83% of which is from the production of maize (33%), vegetables (27%), and fruits (23%). The deceleration of N2O emissions highlights that policy interventions and agronomy practices (i.e., optimizing N rate and sowing structure) are potential pathways for further ambitious N2O mitigation in China and other developing countries. |
| URI | http://hdl.handle.net/20.500.11897/648070 |
| ISSN | 0013-936X |
| DOI | 10.1021/acs.est.1c07276 |
| Indexed | SCI(E) |
| Appears in Collections: | 城市与环境学院 地表过程分析与模拟教育部重点实验室 |
