Agricultural ditches are hotspots of greenhouse gas emissions controlled by nutrient input
文献类型：期刊论文
| 作者 | Wu, Wenxin3; Niu, Xueqi3; Yan, Zhifeng2,3; Li, Siyue6; Comer-Warner, Sophie A.1; Tian, Hanqin5; Li, Si-Liang2,3; Zou, Jianwen7; Yu, Guirui3,8; Liu, Cong-Qiang2,3,4 |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2023-08-15 |
| 卷号 | 242页码:12 |
| ISSN号 | 0043-1354 |
| 关键词 | Agricultural ditch Inland water Greenhouse gasses Nutrient input Global warming potential |
| DOI | 10.1016/j.watres.2023.120271 |
| 通讯作者 | Yan, Zhifeng(yanzf17@tju.edu.cn) |
| 英文摘要 | Agricultural ditches are pervasive in agricultural areas and are potential greenhouse gas (GHG) hotspots, since they directly receive abundant nutrients from neighboring farmlands. However, few studies measure GHG concentrations or fluxes in this particular water course, likely resulting in underestimations of GHG emissions from agricultural regions. Here we conducted a one-year field study to investigate the GHG concentrations and fluxes from typical agricultural ditch systems, which included four different types of ditches in an irrigation district located in the North China Plain. The results showed that almost all the ditches were large GHG sources. The mean fluxes were 333 & mu;mol m-2 h-1 for CH4, 7.1 mmol m-2 h-1 for CO2, and 2.4 & mu;mol m-2 h-1 for N2O, which were approximately 12, 5, and 2 times higher, respectively, than that in the river connecting to the ditch systems. Nutrient input was the primary driver stimulating GHG production and emissions, resulting in GHG concentrations and fluxes increasing from the river to ditches adjacent to farmlands, which potentially received more nutrients. Nevertheless, the ditches directly connected to farmlands showed lower GHG concentrations and fluxes compared to the ditches adjacent to farmlands, possibly due to seasonal dryness and occasional drainage. All the ditches covered approximately 3.3% of the 312 km2 farmland area in the study district, and the total GHG emission from the ditches in this area was estimated to be 26.6 Gg CO2-eq yr 1, with 17.5 Gg CO2, 0.27 Gg CH4, and 0.006 Gg N2O emitted annually. Overall, this study demonstrated that agricultural ditches were hotspots of GHG emissions, and future GHG estimations should incorporate this ubiquitous but underrepresented water course. |
| WOS关键词 | NITROUS-OXIDE EMISSION ; ANAEROBIC METHANE OXIDATION ; CARBON-DIOXIDE ; DRAINAGE DITCHES ; N2O EMISSIONS ; NORTH CHINA ; WATER ; EXCHANGE ; EUTROPHICATION ; DYNAMICS |
| 资助项目 | National Natural Science Foundation of China[42077009] ; National Natural Science Foundation of China[42293260] ; National Natural Science Foundation of China[42221001] ; National Key Research and Development Program of China[2022YFF1301002] ; Haihe Laboratory of Sustainable Chemical Transformations ; Tianjin Municipal Science and Technology Bureau[20JCQNJC01600] |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:001033957400001 |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China ; Haihe Laboratory of Sustainable Chemical Transformations ; Tianjin Municipal Science and Technology Bureau |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/195773]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yan, Zhifeng |
| 作者单位 | 1.Univ Birmingham, Sch Geog, Earth & Environm Sci, Birmingham B15 2TT, Warwickshire, England 2.Tianjin Univ, Tianjin Key Lab Earth Crit Zone Sci & Sustainable, Crit Zone Observ Bohai Coastal Reg, Tianjin 300072, Peoples R China 3.Tianjin Univ, Inst Surface Earth Syst Sci, Sch Earth Syst Sci, Tianjin 300072, Peoples R China 4.Haihe Lab Sustainable Chem Transformat, Tianjin 300072, Peoples R China 5.Schiller Inst Integrated Sci & Soc, Boston Coll, Dept Earth & Environm Sci, Chestnut Hill, MA 02467 USA 6.Inst Changjiang Water Environm & Ecol Secur, Wuhan Inst Technol, Engn Res Ctr Phosphorus Resources Dev, Sch Environm Ecol & Biol Engn,Key Lab Green Chem, Wuhan 430205, Peoples R China 7.Nanjing Agr Univ, Coll Resources & Environm Sci, Key Lab Low carbon & Green Agr Southeastern China, Minist Agr & Rural Affairs, Nanjing, Peoples R China 8.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Wenxin,Niu, Xueqi,Yan, Zhifeng,et al. Agricultural ditches are hotspots of greenhouse gas emissions controlled by nutrient input[J]. WATER RESEARCH,2023,242:12. |
| APA | Wu, Wenxin.,Niu, Xueqi.,Yan, Zhifeng.,Li, Siyue.,Comer-Warner, Sophie A..,...&Liu, Cong-Qiang.(2023).Agricultural ditches are hotspots of greenhouse gas emissions controlled by nutrient input.WATER RESEARCH,242,12. |
| MLA | Wu, Wenxin,et al."Agricultural ditches are hotspots of greenhouse gas emissions controlled by nutrient input".WATER RESEARCH 242(2023):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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