Factors limiting microbial N2O and CO2 production in a cultivated peatland overlying an acid sulphate subsoil derived from black schist

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dc.contributor.author Mäkelä, Minna
dc.contributor.author Kabir, Kazi Md. Jahangir
dc.contributor.author Kanerva, Sanna
dc.contributor.author Yli-Halla, Markku
dc.contributor.author Simojoki, Asko
dc.date.accessioned 2021-10-04T08:09:01Z
dc.date.available 2021-10-04T08:09:01Z
dc.date.issued 2022-01-01
dc.identifier.citation Mäkelä , M , Kabir , K M J , Kanerva , S , Yli-Halla , M & Simojoki , A 2022 , ' Factors limiting microbial N2O and CO2 production in a cultivated peatland overlying an acid sulphate subsoil derived from black schist ' , Geoderma , vol. 405 , 115444 . https://doi.org/10.1016/j.geoderma.2021.115444
dc.identifier.other PURE: 168910263
dc.identifier.other PURE UUID: f3383cb7-0237-44aa-9f5f-b0127bebde4a
dc.identifier.other ORCID: /0000-0003-2397-3553/work/100975865
dc.identifier.other ORCID: /0000-0002-2307-4892/work/100976067
dc.identifier.other ORCID: /0000-0002-8062-7019/work/100978295
dc.identifier.other WOS: 000703712100031
dc.identifier.uri http://hdl.handle.net/10138/334860
dc.description.abstract Factors limiting the production of the greenhouse gases nitrous oxide (N2O) and carbon dioxide (CO2) were investigated in three incubation experiments conducted with soil from top- and subsoil horizons of a peatland which had an acid sulphate mineral subsoil derived from black schists. The effect of moisture was investigated by equilibrating undisturbed soil samples from three horizons (H-2, Cg and Cr) at -10, -60 or -100 cm matric potential and measuring the gas production. In the second experiment, the effects of temperature and various substrates were studied by incubating disturbed soil samples in aerobic conditions at 5 or 20 degrees C, and measuring basal respiration and N2O production before and after adding water, glucose or ammonium into the soil. In the third experiment, the effects of added glucose and/or nitrate on the denitrification in soil samples from four horizons (H1, H2, Cg and Cr were investigated by acetylene inhibition and monitoring of N2O production during a 48-h anaerobic incubation. The production of CO2 in the topmost peat horizon was largest at -10 cm matric potential, and it was larger than those in the mineral subsoil also at -60 and -100 cm potentials. In contrast, drainage seemed to increase N2O production, whereas in the wettest condition the production of N2O in the mineral subsoil was small and the peat horizon was a sink of N2O. Lowering of temperature (from 20 degrees C to 5 degrees C) decreased CO2 production, as expected, but it had almost no role in the production of N2O in aerobic conditions. Glucose addition increased the aerobic production of CO2 in peat, but it had a minor effect in the mineral horizons. Lack of C source (glucose) was limiting anaerobic N2O production in the uppermost peat horizon, while in all other horizons, nitrate proved to be the most limiting factor. It is concluded that peatlands with black schist derived acid sulphate subsoil horizons, such as in this study, have high microbial activity in the peaty topsoil horizons but little microbial activity in the mineral subsoil. These findings are contrary to previous results obtained in sediment-derived acid sulphate soils. en
dc.format.extent 13
dc.language.iso eng
dc.relation.ispartof Geoderma
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 415 Other agricultural sciences
dc.subject Nitrous oxide
dc.subject Carbon dioxide
dc.subject Basal respiration
dc.subject Substrate induced gas production
dc.subject Denitrification
dc.subject Peat
dc.subject Black schist
dc.subject Acid sulphate soil
dc.subject WATER
dc.subject REDUCTION
dc.subject IMPACTS
dc.subject TOPSOIL
dc.title Factors limiting microbial N2O and CO2 production in a cultivated peatland overlying an acid sulphate subsoil derived from black schist en
dc.type Article
dc.contributor.organization Environmental Soil Science
dc.contributor.organization Department of Agricultural Sciences
dc.contributor.organization Teachers' Academy
dc.contributor.organization Sphagnum moss as a growing medium
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.geoderma.2021.115444
dc.relation.issn 0016-7061
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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