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Storage and Distrib...
Storage and Distribution of Organic Carbon and Nutrients in Acidic Soils Developed on Sulfidic Sediments : The Roles of Reactive Iron and Macropores
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- Yu, Changxun, 1983- (author)
- Linnéuniversitetet,Institutionen för biologi och miljö (BOM),Department of Biology and Environmental Science, Linnaeus University, Kalmar, Sweden
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- Luong, Nguyen Tan, 1995- (author)
- Umeå universitet,Kemiska institutionen
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- Hefni, Mohammed E. (author)
- Linnéuniversitetet,Institutionen för kemi och biomedicin (KOB),Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
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- Song, Zhaoliang (author)
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin, China
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- Högfors-Rönnholm, Eva (author)
- Research and Development, Novia University of Applied Sciences, Vaasa, Finland
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- Engblom, Sten (author)
- Research and Development, Novia University of Applied Sciences, Vaasa, Finland
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- Xie, Shurong (author)
- School of Earth Sciences, East China University of Technology, Nanchang, China
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- Chernikov, Roman (author)
- Canadian Light Source, 44 Innovation Boulevard, SK, Saskatoon, Canada
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- Broström, Markus (author)
- Umeå universitet,Institutionen för tillämpad fysik och elektronik
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- Boily, Jean-François (author)
- Umeå universitet,Kemiska institutionen
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- Åström, Mats E., 1963- (author)
- Linnéuniversitetet,Institutionen för biologi och miljö (BOM),Department of Biology and Environmental Science, Linnaeus University, Kalmar, Sweden
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(creator_code:org_t)
- American Chemical Society (ACS), 2024
- 2024
- English.
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In: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 58:21, s. 9200-9212
- Related links:
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https://lnu.diva-por... (primary) (Raw object)
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Subject headings
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- In a boreal acidic sulfate-rich subsoil (pH 3–4) developing on sulfidic and organic-rich sediments over the past 70 years, extensive brownish-to-yellowish layers have formed on macropores. Our data reveal that these layers (“macropore surfaces”) are strongly enriched in 1 M HCl-extractable reactive iron (2–7% dry weight), largely bound to schwertmannite and 2-line ferrihydrite. These reactive iron phases trap large pools of labile organic matter (OM) and HCl-extractable phosphorus, possibly derived from the cultivated layer. Within soil aggregates, the OM is of a different nature from that on the macropore surfaces but similar to that in the underlying sulfidic sediments (C-horizon). This provides evidence that the sedimentary OM in the bulk subsoil has been largely preserved without significant decomposition and/or fractionation, likely due to physiochemical stabilization by the reactive iron phases that also existed abundantly within the aggregates. These findings not only highlight the important yet underappreciated roles of iron oxyhydroxysulfates in OM/nutrient storage and distribution in acidic sulfate-rich and other similar environments but also suggest that boreal acidic sulfate-rich subsoils and other similar soil systems (existing widely on coastal plains worldwide and being increasingly formed in thawing permafrost) may act as global sinks for OM and nutrients in the short run.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Markvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Soil Science (hsv//eng)
Keyword
- acid sulfate soil
- macropores
- reactive iron
- sulfide oxidation
- organic carbon storage
- nutrients
- Miljövetenskap
- Environmental Science
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Yu, Changxun, 19 ...
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Luong, Nguyen Ta ...
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Hefni, Mohammed ...
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Song, Zhaoliang
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Högfors-Rönnholm ...
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Engblom, Sten
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show more...
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Xie, Shurong
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Chernikov, Roman
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Broström, Markus
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Boily, Jean-Fran ...
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Åström, Mats E., ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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- AGRICULTURAL SCIENCES
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AGRICULTURAL SCI ...
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and Agriculture Fore ...
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and Soil Science
- Articles in the publication
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Environmental Sc ...
- By the university
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Linnaeus University
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Umeå University