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Enhanced nitrogen imbalances in agroecosystems driven by changing cropping systems in a coastal area of eastern China: from field to watershed scale

文献类型：期刊论文

作者Li, Yanqiang2,3; Wang, Fang2; Yan, Weijin2; Lv, Shucong2,3; Li, Qingqian2,3; Yu, Qibiao2,3; Wang, Jun1
刊名ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
出版日期2019-09-01
卷号21期号:9页码:1532-1548
ISSN号2050-7887
DOI10.1039/c9em00219g
通讯作者Yan, Weijin(yanwj@igsnrr.ac.cn)
英文摘要Agricultural activities exacerbate nitrogen (N) imbalances in the agroecosystem by disturbing the N inputs and outputs, yet the influence of changes in cropping systems on the N balance of agroecosystems remains unclear. In this study, at the field scale, we calculated the N balance of four cropping systems, (1) traditional crops with traditional crop rotation (G-G), (2) vegetables with traditional crop rotation (V-G), (3) vegetables with vegetable rotation (V-V), and (4) greenhouse vegetables (GHV); then analyzed the influence of changes in cropping systems from 1995 to 2015 on the N balances in the agroecosystems in sub-watersheds of the Dagu River. The results indicate that N balances were higher in GHV, V-V, and V-G than G-G, due to significantly higher inputs of N fertilizers and lower N use efficiency (NUE) in vegetable cultivation compared to traditional crops. Driven by economic benefits between 1995 and 2015, V-G, V-V, and GHV replaced G-G in a considerable number of cultivation areas in the sub-watersheds. These changes resulted in an increase of 109.9-170.1% in the N balance in the agroecosystem in the sub-watersheds between 1995 and 2015. In the entire watershed, the total N surplus contribution by V-V, V-G, and GHV increased from 39.3% to 79.1% between 1995 and 2015. These findings suggest that increased vegetable cultivation contributed to the increased risk of N pollution in agricultural production. Thus, there should be a focus on the management of cropping systems to control N loss from agricultural lands.
WOS关键词SUBMARINE GROUNDWATER DISCHARGE ; VEGETABLE PRODUCTION ; USE EFFICIENCY ; JIAOZHOU BAY ; AGRICULTURAL LAND ; REACTIVE NITROGEN ; ORGANIC-MATTER ; SURFACE RUNOFF ; FERTILIZER USE ; NITRATE
资助项目National Key Basic Research Program of China (973 Program)[2015CB452901] ; National Key Research and Development Program of China[2016YFA0602704] ; Strategic Leading Science and Technology Program of the Chinese Academy of Sciences[XDA20020202] ; National Natural Science Foundation of China[41771050]
WOS研究方向Chemistry ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000487060100007
出版者ROYAL SOC CHEMISTRY
资助机构National Key Basic Research Program of China (973 Program) ; National Key Research and Development Program of China ; Strategic Leading Science and Technology Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/69541]  
专题中国科学院地理科学与资源研究所
通讯作者Yan, Weijin
作者单位1.Qingdao Agr Technol Extens Stn, Qingdao 266200, Shandong, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Li, Yanqiang,Wang, Fang,Yan, Weijin,et al. Enhanced nitrogen imbalances in agroecosystems driven by changing cropping systems in a coastal area of eastern China: from field to watershed scale[J]. ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS,2019,21(9):1532-1548.
APA Li, Yanqiang.,Wang, Fang.,Yan, Weijin.,Lv, Shucong.,Li, Qingqian.,...&Wang, Jun.(2019).Enhanced nitrogen imbalances in agroecosystems driven by changing cropping systems in a coastal area of eastern China: from field to watershed scale.ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS,21(9),1532-1548.
MLA Li, Yanqiang,et al."Enhanced nitrogen imbalances in agroecosystems driven by changing cropping systems in a coastal area of eastern China: from field to watershed scale".ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS 21.9(2019):1532-1548.

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来源：地理科学与资源研究所

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