globalchange  > 气候减缓与适应
DOI: 10.1002/2017JG004199
Scopus记录号: 2-s2.0-85043699286
论文题名:
Denitrification in Shallow Groundwater Below Different Arable Land Systems in a High Nitrogen-Loading Region
作者: Zhou W.; Ma Y.; Well R.; Wang H.; Yan X.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期:3
起始页码: 991
结束页码: 1004
语种: 英语
英文关键词: Agriculture ; Excess N2 ; Groundwater denitrification ; Land use type ; N budget
Scopus关键词: agricultural land ; concentration (composition) ; denitrification ; dissolved oxygen ; groundwater ; land use ; nitrate ; nitrogen ; nutrient budget ; sampling ; shallow water ; water chemistry ; China
英文摘要: To evaluate the risk of nitrate (NO3 −-N) in groundwater, it is necessary to know the denitrification capacity. In this study, observations were carried out for 2 years to investigate the groundwater denitrification capacity below three arable land systems in eastern China. Denitrification capacity was assessed by measuring the concentration and distribution patterns of nitrous oxide (N2O) and dinitrogen (N2) in groundwater. The results revealed that groundwater denitrification activity was high and consumed 76%, 83%, and 65% of the NO3 −-N in the vineyard (VY), vegetable field (VF), and paddy field (PF), respectively. The high denitrification activity might be attributed to the strong reducing conditions, with high dissolved oxygen concentrations in groundwater, which promotes denitrification. During the sampling period, we observed high dinitrogen (excess N2) accumulation in groundwater, which exceeded the total reactive nitrogen (N) in the deep layer. The large amount of excess N2 observed in VY and VF indicated that considerable N was stored as gaseous N2 in groundwater and should not be ignored when balancing N budgets in aquifers where denitrification is high. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114337
Appears in Collections:气候减缓与适应

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作者单位: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China; University of Chinese Academy of Sciences, Beijing, China; Jiangsu Key Laboratory of Agricultural Meteorology, College of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, China; Thünen Institute of Climate-Smart Agriculture, Braunschweig, Germany; College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China

Recommended Citation:
Zhou W.,Ma Y.,Well R.,et al. Denitrification in Shallow Groundwater Below Different Arable Land Systems in a High Nitrogen-Loading Region[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(3)
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