Food benefit and climate warming potential of nitrogen fertilizer uses in China
文献类型：SCI/SSCI论文
| 作者 | Tian H. Q. ; Lu C. Q. ; Melillo J. ; Ren W. ; Huang Y. ; Xu X. F. ; Liu M. L. ; Zhang C. ; Chen G. S. ; Pan S. F. ; Liu J. Y. ; Reilly J. |
| 发表日期 | 2012 |
| 关键词 | China crop yield CO2 uptake N2O emission nitrogen fertilizer multifactor environmental-changes n2o emissions soil carbon croplands management co2 |
| 英文摘要 | Chemical nitrogen (N) fertilizer has long been used to help meet the increasing food demands in China, the top N fertilizer consumer in the world. Growing concerns have been raised on the impacts of N fertilizer uses on food security and climate change, which is lack of quantification. Here we use a carbon-nitrogen (C-N) coupled ecosystem model, to quantify the food benefit and climate consequence of agronomic N addition in China over the six decades from 1949 to 2008. Results show that N fertilizer-induced crop yield and soil C sequestration had reached their peaks, while nitrous oxide (N2O) emission continued rising as N was added. Since the early 2000s, stimulation of excessive N fertilizer uses to global climate warming through N2O emission was estimated to outweigh their climate benefit in increasing CO2 uptake. The net warming effect of N fertilizer uses, mainly centered in the North China Plain and the middle and lower reaches of Yangtze River Basin, with N2O emission completely counteracting or even exceeding, by more than a factor of 2, the CO2 sink. If we reduced the current N fertilizer level by 60% in 'over-fertilized' areas, N2O emission would substantially decrease without significantly influencing crop yield and soil C sequestration. |
| 出处 | Environmental Research Letters |
| 卷 | 7 |
| 期 | 4 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1748-9326 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30760]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Tian H. Q.,Lu C. Q.,Melillo J.,et al. Food benefit and climate warming potential of nitrogen fertilizer uses in China. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
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