IGSNRR OpenIR
Enhanced nitrogen imbalances in agroecosystems driven by changing cropping systems in a coastal area of eastern China: from field to watershed scale
Li, Yanqiang1,2; Wang, Fang1; Yan, Weijin1; Lv, Shucong1,2; Li, Qingqian1,2; Yu, Qibiao1,2; Wang, Jun3
2019-09-01
Source PublicationENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
ISSN2050-7887
Volume21Issue:9Pages:1532-1548
Corresponding AuthorYan, Weijin(yanwj@igsnrr.ac.cn)
AbstractAgricultural 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.
DOI10.1039/c9em00219g
WOS KeywordSUBMARINE GROUNDWATER DISCHARGE ; VEGETABLE PRODUCTION ; USE EFFICIENCY ; JIAOZHOU BAY ; AGRICULTURAL LAND ; REACTIVE NITROGEN ; ORGANIC-MATTER ; SURFACE RUNOFF ; FERTILIZER USE ; NITRATE
Indexed BySCI
Language英语
Funding ProjectNational 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]
Funding OrganizationNational 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
WOS Research AreaChemistry ; Environmental Sciences & Ecology
WOS SubjectChemistry, Analytical ; Environmental Sciences
WOS IDWOS:000487060100007
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/69542
Collection中国科学院地理科学与资源研究所
Corresponding AuthorYan, Weijin
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Qingdao Agr Technol Extens Stn, Qingdao 266200, Shandong, Peoples R China
Recommended Citation
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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