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<sup>15</sup>N-tracer approach to assess nitrogen cycling processes: Nitrate reduction, anammox and denitrification in different pH cropland soils

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dc.contributor.author Xue D.
dc.contributor.author Yu H.
dc.contributor.author Fang Y.
dc.contributor.author Shan J.
dc.contributor.author Xi D.
dc.contributor.author Wang Y.
dc.contributor.author Kuzyakov Y.
dc.contributor.author Wang Z.L.
dc.date.accessioned 2021-02-25T20:35:00Z
dc.date.available 2021-02-25T20:35:00Z
dc.date.issued 2020
dc.identifier.issn 0341-8162
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/161852
dc.description.abstract © 2020 Elsevier B.V. Denitrification and anaerobic ammonium oxidation (anammox) are two key processes in the biogeochemical cycle of nitrogen (N) and are dominant pathways of nitrate (NO3−) losses as N2 and N2O from soils. To verify the mechanisms of the NO3− reduction comparable with the intensity of denitrification (Den) and/or anammox (Ana) processes (Den+Ana-N2) in three pH cropland soils (acidic, near neutral and alkaline), the rates of Den+Ana-N2 and NO3− reduction were investigated using slurry-based 15N tracer technique. The potential rates of N2 produced by denitrification (Denitrif-N2) ranged from 3.78 to 5.52 nmol N g−1 h−1, which was 10–30 times faster than the N2 rates (0.12–0.42 nmol N g−1 h−1) produced by anammox (Anammox-N2). The NO3− reduction rates ranged from 5.52 to 9.3 nmol N g−1 h−1, faster than the rates of Den+Ana-N2 (from 3.9 to 5.94 nmol N g−1 h−1). Both the NO3− reduction and Den+Ana-N2 rates were consistent with the fastest rates common in soils with near neutral pH, while both processes were much slower in acidic soils. The NO3− reduction closely correlated with the Den+Ana-N2 rates, which provided a rough estimation of proportion of NO3− reduction by Den+Ana-N2 process (81%) as the dominant and 19% by extra N2O or NO production by denitrification or other processes consuming NO3−. A constant ratio of 4.3 between Den+Ana-N2 and all other NO3− consumption processes within a wide pH range (from 5.2 to 8.0) of cropland soils strongly simplify the assessment of gaseous N losses and of NO3− transformations.
dc.relation.ispartofseries Catena
dc.subject Anammox rate
dc.subject Den+Ana-N rate 2
dc.subject Denitrification rate
dc.subject N cycle in soil
dc.subject NO reduction rate 3 −
dc.title <sup>15</sup>N-tracer approach to assess nitrogen cycling processes: Nitrate reduction, anammox and denitrification in different pH cropland soils
dc.type Article
dc.relation.ispartofseries-volume 193
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS03418162-2020-193-SID85083862594


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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