Soil-air greenhouse gas fluxes influenced by farming practices in reservoir drawdown area: A case at the Three Gorges Reservoir in China | |
Li, Zhe1,2; Zhang, Zengyu4; Lin, Chuxue2; Chen, Yongbo2; Wen, Anbang3![]() | |
刊名 | JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2016-10-01 | |
卷号 | 181页码:64-73 |
关键词 | Three Gorges Reservoir Drawdown area Farming practices Greenhouse gas emissions Global warming potential |
ISSN号 | 0301-4797 |
通讯作者 | Li, Zhe |
英文摘要 | The Three Gorges Reservoir (TGR) in China has large water level variations, creating about 393 km(2) of drawdown area seasonally. Farming practices in drawdown area during the low water level period is common in the TGR. Field experiments on soil-air greenhouse gas (GHG) emissions in fallow grassland, peanut field and corn field in reservoir drawdown area at Lijiaba Bay of the Pengxi River, a tributary of the Yangtze River in the TGR were carried out from March through September 2011. Experimental fields in drawdown area had the same land use history. They were adjacent to each other horizontally at a narrow range of elevation i.e. 167-169 m, which assured that they had the same duration of reservoir inundation. Unflooded grassland with the same land-use history was selected as control for study. Results showed that mean value of soil CO2 emissions in drawdown area was 10.38 +/- 0.97 mmol m(-2) h(-1) The corresponding CH4 fluxes and N2O fluxes were -8.61 +/- 2.15 mu mol m(-2) h(-1) and 3.42 +/- 0.80 mu mol m(-2) h(-1). Significant differences and monthly variations among land uses in treatments of drawdown area and unflooded grassland were evident. These were impacted by the change in soil physiochemical properties which were alerted by reservoir operation and farming. Particularly, N-fertilization in corn field stimulated N2O emissions from March to May. In terms of global warming potentials (GWP), corn field in drawdown area had the maximum GWP mainly due to N-fertilization. Gross GWP in peanut field in drawdown area was about 7% lower than that in fallow grassland. Compared to unflooded grassland, reservoir operation created positive net effect on GHG emissions and GWPs in drawdown area. However, selection of crop species, e.g. peanut, and best practices in farming, e.g. prohibiting N-fertilization, could potentially mitigate GWPs in drawdown area. In the net GHG emissions evaluation in the TGR, farming practices in the drawdown area shall be taken into consideration. (C) 2016 Elsevier Ltd. All rights reserved. |
WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
类目[WOS] | Environmental Sciences |
研究领域[WOS] | Environmental Sciences & Ecology |
关键词[WOS] | ENVIRONMENTAL-IMPACT ASSESSMENTS ; LEVEL-FLUCTUATING ZONE ; NITROGEN-FERTILIZATION ; PHYSICAL-PROPERTIES ; CROPPING SEQUENCE ; CARBON-DIOXIDE ; EMISSIONS ; INTENSITY ; GRASSLANDS ; TEMPERATE |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000383291700008 |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/17629] ![]() |
专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 科技与合作处 |
作者单位 | 1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, CAS Key Lab Reservoir Environm, Chongqing 400714, Peoples R China 2.China Three Gorges Corp, Beijing 100038, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 4.Chongqing Univ, Coll Urban Construct & Environm Engn, Chongqing 400045, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Zhe,Zhang, Zengyu,Lin, Chuxue,et al. Soil-air greenhouse gas fluxes influenced by farming practices in reservoir drawdown area: A case at the Three Gorges Reservoir in China[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2016,181:64-73. |
APA | Li, Zhe,Zhang, Zengyu,Lin, Chuxue,Chen, Yongbo,Wen, Anbang,&Fang, Fang.(2016).Soil-air greenhouse gas fluxes influenced by farming practices in reservoir drawdown area: A case at the Three Gorges Reservoir in China.JOURNAL OF ENVIRONMENTAL MANAGEMENT,181,64-73. |
MLA | Li, Zhe,et al."Soil-air greenhouse gas fluxes influenced by farming practices in reservoir drawdown area: A case at the Three Gorges Reservoir in China".JOURNAL OF ENVIRONMENTAL MANAGEMENT 181(2016):64-73. |
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