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Simultaneous Measur...
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Wang, TaoInstitute of Mountain Hazards and Environment Chinese Academy of Sciences
(författare)
Simultaneous Measurements of Dissolved Organic Carbon and Soil Respiration Reveal Reduced Soil Carbon Loss Under Nitrogen Addition in a Montane Forest
- Artikel/kapitelEngelska2022
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Nummerbeteckningar
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LIBRIS-ID:oai:lup.lub.lu.se:ba8eca8f-d1d7-4369-9b34-6b3ca4a885ce
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https://lup.lub.lu.se/record/ba8eca8f-d1d7-4369-9b34-6b3ca4a885ceURI
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https://doi.org/10.1029/2022JG006829DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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Ämneskategori:ref swepub-contenttype
Anmärkningar
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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 och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Ao, JingUniversity of the Chinese Academy of Sciences,Institute of Mountain Hazards and Environment Chinese Academy of Sciences
(författare)
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Liu, XinyuUniversity of the Chinese Academy of Sciences,Institute of Mountain Hazards and Environment Chinese Academy of Sciences
(författare)
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Peng, YuanruiUniversity of the Chinese Academy of Sciences,Institute of Mountain Hazards and Environment Chinese Academy of Sciences
(författare)
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Op de Beeck, MichielLund 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(Swepub:lu)biol-mop
(författare)
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Chang, RuiyingInstitute of Mountain Hazards and Environment Chinese Academy of Sciences
(författare)
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Institute of Mountain Hazards and Environment Chinese Academy of SciencesUniversity of the Chinese Academy of Sciences
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Geophysical Research: Biogeosciences127:72169-8953
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