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Simultaneous Measur...
Simultaneous Measurements of Dissolved Organic Carbon and Soil Respiration Reveal Reduced Soil Carbon Loss Under Nitrogen Addition in a Montane Forest
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- Wang, Tao (författare)
- Institute of Mountain Hazards and Environment Chinese Academy of Sciences
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- Ao, Jing (författare)
- University of the Chinese Academy of Sciences,Institute of Mountain Hazards and Environment Chinese Academy of Sciences
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- Liu, Xinyu (författare)
- University of the Chinese Academy of Sciences,Institute of Mountain Hazards and Environment Chinese Academy of Sciences
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- Peng, Yuanrui (författare)
- University of the Chinese Academy of Sciences,Institute of Mountain Hazards and Environment Chinese Academy of Sciences
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- Op de Beeck, Michiel (författare)
- Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Centre for Environmental and Climate Science (CEC),Faculty of Science
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- Chang, Ruiying (författare)
- Institute of Mountain Hazards and Environment Chinese Academy of Sciences
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(creator_code:org_t)
- 2022
- 2022
- Engelska.
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Ingår i: Journal of Geophysical Research: Biogeosciences. - 2169-8953. ; 127:7
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A major uncertainty in the estimation of soils acting as net carbon (C) sinks or sources stem from the effects of anthropogenic nitrogen (N) input on the balance between plant C input and soil C loss. In contrast to the generally observed increasing pattern of plant C input, the response of soil C loss to increased N deposition remains elusive, largely due to its large temporal variation. Here simultaneous measurements of two major soil C loss pathways, including dissolved organic carbon (DOC) leaching and soil respiration, were conducted for 5 and 3 yr, respectively, to assess the effects of N addition on soil C loss in an N-limited montane forest. The effects were seasonal, depth and N level dependent and the two pathways responded asynchronously to N addition. Significant decreases in DOC concentrations and fluxes in leachates from the organic layer were observed during autumn/winter under a high N addition rate (40 kg N/ha/yr). No significant impact of N addition on DOC concentrations or fluxes was observed for leachates from the mineral soil horizon. Biodegradability was low for DOC from both soil layers and was not consistently influenced by N addition. Soil respiration was significantly decreased under high N addition. Annual soil C loss (estimated by summing DOC leaching from the mineral horizon and soil respiration) showed that N addition reduced soil C loss consistently over years, implying that the forest soil is likely a C sink under excess N deposition, which should be confirmed with longer term monitoring.
Ämnesord
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Markvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Soil Science (hsv//eng)
Nyckelord
- aromaticity of DOC
- biodegradability
- CO
- dissolved organic carbon leaching
- nitrogen deposition
- soil carbon
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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