Flow velocity and nutrients affect CO2 emissions from agricultural drainage channels in the North China Plain
文献类型：期刊论文
| 作者 | Leng, Peifang1,2,3; Li, Fadong1,3; Du, Kun1,3; Li, Zhao1,3; Gu, Congke1,3; Koschorreck, Matthias2 |
| 刊名 | ENVIRONMENTAL SCIENCES EUROPE
 |
| 出版日期 | 2020-10-31 |
| 卷号 | 32期号:1页码:13 |
| 关键词 | CO2 emissions Agricultural irrigation drainage Controlled experiments Groundwater North China Plain |
| ISSN号 | 2190-4707 |
| DOI | 10.1186/s12302-020-00426-2 |
| 通讯作者 | Li, Fadong(lifadong@igsnrr.ac.cn) |
| 英文摘要 | Background Groundwater is typically over-saturated in CO2 with respect to atmospheric equilibrium. Irrigation with groundwater is a common agricultural practice in many countries, but little is known about the fate of dissolved inorganic carbon (DIC) in irrigation groundwater and its contribution to the CO2 emission inventory from land to the atmosphere. We performed a mesocosm experiment to study the fate of DIC entering agricultural drainage channels in the North China Plain. Specifically, we aimed to unravel the effect of flow velocity and nutrient on CO2 emissions. Results All treatments were emitting CO2. Approximately half of the DIC in the water was consumed by TOC production (1-16%), emitted to the atmosphere (14-20%), or precipitated as calcite (CaCO3) (14-20%). We found that DIC depletion was stimulated by nutrient addition, whereas more CO2 evasion occurred in the treatments without nutrients addition. On the other hand, about 50% of CO2 was emitted within the first 50 h under high flow velocity. Thus, in the short term, high nutrient levels may counteract CO2 emissions from drainage channels, whereas the final fate of the produced biomass (burial versus mineralization to CO2 or even CH4) determines the duration of the effect. Conclusion Our study reveals that both hydrology and biological processes affect CO2 emissions from groundwater irrigation channels. The estimated CO2 emission from total groundwater depletion in the North China Plain is up to 0.52 +/- 0.07 Mt CO2 year(-1). Thus, CO2 emissions from groundwater irrigation should be considered in regional CO2 budgets, especially given that groundwater depletion is expected to acceleration in the future. |
| WOS关键词 | GREENHOUSE-GAS EMISSIONS ; GROUNDWATER DEPLETION ; CARBON EMISSIONS ; LAND-USE ; ECOSYSTEM METABOLISM ; WATER-RESOURCES ; AQUATIC CARBON ; RIVER NETWORK ; STREAMS ; SUSTAINABILITY |
| 资助项目 | National Natural Science Foundation of China (NSFC)[41771292] ; CAS-DAAD Joint Fellowship Program for Doctoral Students |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000583184700001 |
| 出版者 | SPRINGER |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; CAS-DAAD Joint Fellowship Program for Doctoral Students |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/156775]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Fadong |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 2.UFZ Helmholtz Ctr Environm Res, Dept Lake Res, Magdeburg, Germany 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog & Nat Resources Res, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Leng, Peifang,Li, Fadong,Du, Kun,et al. Flow velocity and nutrients affect CO2 emissions from agricultural drainage channels in the North China Plain[J]. ENVIRONMENTAL SCIENCES EUROPE,2020,32(1):13. |
| APA | Leng, Peifang,Li, Fadong,Du, Kun,Li, Zhao,Gu, Congke,&Koschorreck, Matthias.(2020).Flow velocity and nutrients affect CO2 emissions from agricultural drainage channels in the North China Plain.ENVIRONMENTAL SCIENCES EUROPE,32(1),13. |
| MLA | Leng, Peifang,et al."Flow velocity and nutrients affect CO2 emissions from agricultural drainage channels in the North China Plain".ENVIRONMENTAL SCIENCES EUROPE 32.1(2020):13. |
入库方式： OAI收割
来源：地理科学与资源研究所
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