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Tracking the fate of deposited nitrogen and its redistribution in a subtropical watershed in China
Gao, Yang1,2,3; Hao, Zhuo1,2; Han, Ning1,2; Yang, Jun1,2; Tian, Jing1,2; Song, Xianwei1; Wen, Xuefa1,2; He, Nianpeng1,2
2019-07-01
Source PublicationECOHYDROLOGY
ISSN1936-0584
Volume12Issue:5Pages:16
Corresponding AuthorGao, Yang(gaoyang@igsnrr.ac.cn)
AbstractVegetation cover and soil infiltration can result in nitrogen (N) redistribution and associative isotopic fractionation. This study investigated N and its isotopic characteristics from deposition to baseflow under different vegetation canopy cover types in a subtropical watershed in China. Results showed that canopy interception via vegetation cover types exhibited notable dilution effects on reactive nitrogen (N-r) deposition during the rainy season, with the highest maximum value of 287.4%. The range of delta N-15 changed from 3.0 parts per thousand to 11.9 parts per thousand in throughfall, which may have resulted from an increase in N taken up by vegetation and particles washed away from plant leaves during rainfall events. Throughfall, soil water, precipitation, and rainfall run-off were the sources of D and O-18-H2O in baseflow river water, wherein the rainwater and rainfall run-off contributed 73% +/- 8% and 15% +/- 12%, respectively. Soil water was the main source of N-15-NO3 in baseflow river water, which contributes 78% +/- 4% of overall source, but precipitation only contributes 10%. The average annual N-r deposition flux was 24.4 +/- 4.2 kg center dot ha(-1)center dot yr(-1), whereas the annual total nitrogen exportation flux was 1062 +/- 269.8 kg center dot yr(-1). The 46% of HDO or D2O for river water came from rainfall run-off, which would transport a maximum nitrate flux of 354 kg center dot yr(-1). Moreover, vegetation cover and soil infiltration resulted in delta N-15 enrichment and a decrease in N-r in river flow.
KeywordN-15 O-18 delta D-2 baseflow N deposition subtropical watershed
DOI10.1002/eco.2094
WOS KeywordOXYGEN ISOTOPIC COMPOSITION ; LAND-USE TYPES ; SOIL-WATER ; WET DEPOSITION ; HYDROLOGIC PROCESSES ; TERRESTRIAL WATER ; STABLE-ISOTOPE ; NITRATE ; GROUNDWATER ; PRECIPITATION
Indexed BySCI
Language英语
Funding ProjectYouth Innovation Promotion Association CAS; National Natural Science Foundation of China[41871080] ; Youth Innovation Promotion Association CAS; National Natural Science Foundation of China[31570465] ; National Major Science and Technology Program for Water Pollution Control and Treatment[2017ZX07101001]
Funding OrganizationYouth Innovation Promotion Association CAS; National Natural Science Foundation of China ; National Major Science and Technology Program for Water Pollution Control and Treatment
WOS Research AreaEnvironmental Sciences & Ecology ; Water Resources
WOS SubjectEcology ; Environmental Sciences ; Water Resources
WOS IDWOS:000474658500008
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/58563
Collection中国科学院地理科学与资源研究所
Corresponding AuthorGao, Yang
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Gao, Yang,Hao, Zhuo,Han, Ning,et al. Tracking the fate of deposited nitrogen and its redistribution in a subtropical watershed in China[J]. ECOHYDROLOGY,2019,12(5):16.
APA Gao, Yang.,Hao, Zhuo.,Han, Ning.,Yang, Jun.,Tian, Jing.,...&He, Nianpeng.(2019).Tracking the fate of deposited nitrogen and its redistribution in a subtropical watershed in China.ECOHYDROLOGY,12(5),16.
MLA Gao, Yang,et al."Tracking the fate of deposited nitrogen and its redistribution in a subtropical watershed in China".ECOHYDROLOGY 12.5(2019):16.
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