气候变化研究进展2017，Vol.13Issue(3)：273-283,11.DOI:10.12006/j.issn.1673-1719.2016.154
中国小麦和玉米农田N2O减排措施及潜力
Options and Potentials to Mitigate N2O Emissions fromWheat and Maize Fields in China
摘要
Abstract
Upland croplands are the main source of N2O emissions. Mitigation of N2O emissions from upland croplands will greatly contribute to an overall reduction of greenhouse gases from agriculture. Using 355 datasets extracted from 103 publications, a Meta-analysis was performed to investigate the mitigation options and potential of N2O emissions from wheat and maize fields in China. The results showed that application of inhibitors in wheat and maize fields reduced 36%?46% of the N2O emissions with an increase in crop yield. Cutting the application rates of nitrogen fertilizers by no more than 30% could reduce N2O emissions by 10%?18% without crop yield loss. Applications of slow (controlled-) release fertilizers and incorporations of crop residues could significantly mitigate N2O emissions from wheat fields, but the mitigation was not statistically significant in maize fields. The gross N2O emissions could be reduced by 9.29?13.90 Gg N2O-N per wheat season and 10.53?23.19 Gg N2O-N per maize season when different mitigation options were put into practices. The mitigation potential (MP) in wheat cultivation was particularly notable for Henan, Shandong, Hebei and Anhui provinces, accounting for 53% of the total MP in wheat fields. Heilongjiang, Jilin, Shandong, Hebei and Henan provinces showed high MP in maize cultivation, accounting for approximately 50% of the total MP in maize fields.关键词
抑制剂/缓(控)释肥/减少施氮量/N2O/减排潜力Key words
inhibitor/slow (controlled-) release fertilizer/reducing nitrogen rate/nitrous oxide/mitigationpotential引用本文复制引用
李昕,孙文娟,黄耀,于凌飞..中国小麦和玉米农田N2O减排措施及潜力[J].气候变化研究进展,2017,13(3):273-283,11.基金项目
中国科学院战略先导科技专项 (XDA05020205) （XDA05020205）
国家自然科学基金 (31370492) （31370492）
