Nitrogen stocks and flows in an acid sulfate soil

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dc.contributor.author Yli-Halla, Markku
dc.contributor.author Virtanen, Seija
dc.contributor.author Regina, Kristiina
dc.contributor.author Österholm, Peter
dc.contributor.author Ehnvall, Betty
dc.contributor.author Uusi-Kämppä, Jaana
dc.date.accessioned 2020-11-10T10:05:01Z
dc.date.available 2020-11-10T10:05:01Z
dc.date.issued 2020-11-06
dc.identifier.citation Yli-Halla , M , Virtanen , S , Regina , K , Österholm , P , Ehnvall , B & Uusi-Kämppä , J 2020 , ' Nitrogen stocks and flows in an acid sulfate soil ' , Environmental Monitoring and Assessment , vol. 192 , no. 12 , 751 . https://doi.org/10.1007/s10661-020-08697-1
dc.identifier.other PURE: 149480815
dc.identifier.other PURE UUID: 431d9eec-b2fb-42ea-9381-3328d98d7fa7
dc.identifier.other ORCID: /0000-0002-8062-7019/work/83437663
dc.identifier.other WOS: 000586880600001
dc.identifier.uri http://hdl.handle.net/10138/321242
dc.description.abstract Besides causing acidification, acid sulfate (AS) soils contain large nitrogen (N) stocks and are a potential source of N loading to waters and nitrous oxide (N2O) emissions. We quantified the stocks and flows of N, including crop yields, N leaching, and N2O emissions, in a cultivated AS soil in western Finland. We also investigated whether controlled drainage (CD) and sub-irrigation (CDI) to keep the sulfidic horizons inundated can alleviate N losses. Total N stock at 0-100 cm (19.5 Mg ha(-1)) was smaller than at 100-200 cm (26.6 Mg ha(-1)), and the mineral N stock was largest below 170 cm. Annual N leaching (31-91 kg N ha(-1)) plus N in harvested grain (74-122 kg N ha(-1)) was 148% (range 118-189%) of N applied in fertilizers (90-125 kg N ha(-1)) in 2011-2017, suggesting substantial N supply from soil reserves. Annual emissions of N2O measured during 2 years were 8-28 kg N ha(-1). The most probable reasons for high N2O emission rates in AS soils are concomitant large mineral N pools with fluctuating redox conditions and low pH in the oxidized subsoil, all favoring formation of N2O in nitrification and denitrification. Although the groundwater level was higher in CD and CDI than in conventional drainage, N load and crop offtake did not differ between the drainage methods, but there were differences in emissions. Nitrogen flows to the atmosphere and drainage water were clearly larger than those in non-AS mineral soils indicating that AS soils are potential hotspots of environmental impacts. en
dc.format.extent 20
dc.language.iso eng
dc.relation.ispartof Environmental Monitoring and Assessment
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 1172 Environmental sciences
dc.subject 11831 Plant biology
dc.subject Acid sulfate soil
dc.subject Controlled drainage
dc.subject Sub-irrigation
dc.subject N leaching
dc.subject Nitrous oxide emissions
dc.subject IRON SULFIDE OXIDATION
dc.subject CONTROLLED DRAINAGE
dc.subject NITRATE REDUCTION
dc.subject GROWING-SEASON
dc.subject N2O EMISSIONS
dc.subject LOSSES
dc.subject OXIDE
dc.subject DENITRIFICATION
dc.subject MINERALIZATION
dc.subject GEOCHEMISTRY
dc.title Nitrogen stocks and flows in an acid sulfate soil en
dc.type Article
dc.contributor.organization Department of Agricultural Sciences
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1007/s10661-020-08697-1
dc.relation.issn 1573-2959
dc.rights.accesslevel openAccess
dc.type.version publishedVersion
dc.relation.funder EU LIFE+
dc.relation.funder Oiva Kuusisto Säätiö
dc.relation.funder Oiva Kuusisto Säätiö
dc.relation.grantnumber
dc.relation.grantnumber
dc.relation.grantnumber

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