Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14425 |
Chinese cropping systems are a net source of greenhouse gases despite soil carbon sequestration | |
Gao, Bing1,2,3; Huang, Tao3,4; Ju, Xiaotang3; Gu, Baojing5,6; Huang, Wei1,2; Xu, Lilai1,2; Rees, Robert M.7; Powlson, David S.8; Smith, Pete9; Cui, Shenghui1,2 | |
2018-12-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:12页码:5590-5606 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Australia; Scotland; England |
英文摘要 | Soil carbon sequestration is being considered as a potential pathway to mitigate climate change. Cropland soils could provide a sink for carbon that can be modified by farming practices; however, they can also act as a source of greenhouse gases (GHG), including not only nitrous oxide (N2O) and methane (CH4), but also the upstream carbon dioxide (CO2) emissions associated with agronomic management. These latter emissions are also sometimes termed "hidden" or "embedded" CO2. In this paper, we estimated the net GHG balance for Chinese cropping systems by considering the balance of soil carbon sequestration, N2O and CH4 emissions, and the upstream CO2 emissions of agronomic management from a life cycle perspective during 2000-2017. Results showed that although soil organic carbon (SOC) increased by 23.2 +/- 8.6 Tg C per year, the soil N2O and CH4 emissions plus upstream CO2 emissions arising from agronomic management added 269.5 +/- 21.1 Tg C-eq per year to the atmosphere. These findings demonstrate that Chinese cropping systems are a net source of GHG emissions and that total GHG emissions are about 12 times larger than carbon uptake by soil sequestration. There were large variations between different cropping systems in the net GHG balance ranging from 328 to 7,567 kg C-eq ha(-1) year(-1), but all systems act as a net GHG source to the atmosphere. The main sources of total GHG emissions are nitrogen fertilization (emissions during production and application), power use for irrigation, and soil N2O and CH4 emissions. Optimizing agronomic management practices, especially fertilization, irrigation, plastic mulching, and crop residues to reduce total GHG emissions from the whole chain is urgently required in order to develop a low-carbon future for Chinese crop production. |
英文关键词 | agronomic management life cycle analysis N2O and CH4 emission net greenhouse gas balance soil organic carbon upstream CO2 emissions |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000449650600002 |
WOS关键词 | NITROGEN USE EFFICIENCY ; ORGANIC-CARBON ; CLIMATE-CHANGE ; FERTILIZER MANAGEMENT ; N MANAGEMENT ; RICE FIELDS ; EMISSIONS ; AGRICULTURE ; MITIGATION ; CROPLANDS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/18248 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen, Peoples R China; 2.Xiamen Key Lab Urban Metab, Xiamen, Peoples R China; 3.China Agr Univ, Coll Resources & Environm Sci, Key Lab Plant Soil Interact MOE, Beijing, Peoples R China; 4.Nanjing Normal Univ, Coll Geog Sci, Nanjing, Jiangsu, Peoples R China; 5.Zhejiang Univ, Dept Land Management, Hangzhou, Zhejiang, Peoples R China; 6.Univ Melbourne, Sch Agr & Food, Melbourne, Vic, Australia; 7.SRUC, Edinburgh, Midlothian, Scotland; 8.Rothamsted Res, Dept Sustainable Agr Sci, Harpenden, Herts, England; 9.Univ Aberdeen, Inst Biol & Environm Sci, Aberdeen, Scotland |
推荐引用方式 GB/T 7714 | Gao, Bing,Huang, Tao,Ju, Xiaotang,et al. Chinese cropping systems are a net source of greenhouse gases despite soil carbon sequestration[J]. GLOBAL CHANGE BIOLOGY,2018,24(12):5590-5606. |
APA | Gao, Bing.,Huang, Tao.,Ju, Xiaotang.,Gu, Baojing.,Huang, Wei.,...&Cui, Shenghui.(2018).Chinese cropping systems are a net source of greenhouse gases despite soil carbon sequestration.GLOBAL CHANGE BIOLOGY,24(12),5590-5606. |
MLA | Gao, Bing,et al."Chinese cropping systems are a net source of greenhouse gases despite soil carbon sequestration".GLOBAL CHANGE BIOLOGY 24.12(2018):5590-5606. |
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