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Soil organic carbon and clay content as deciding factors for net nitrogen mineralization and cereal yields in boreal mineral soils

dc.contributor.authorSoinne, Helena
dc.contributor.authorKeskinen, Riikka
dc.contributor.authorRäty, Mari
dc.contributor.authorKanerva, Sanna
dc.contributor.authorTurtola, Eila
dc.contributor.authorKaseva, Janne
dc.contributor.authorNuutinen, Visa
dc.contributor.authorSimojoki, Asko
dc.contributor.authorSalo, Tapio
dc.contributor.departmentid4100211210
dc.contributor.departmentid4100110510
dc.contributor.departmentid4100210910
dc.contributor.departmentid4100110410
dc.contributor.departmentid4100111010
dc.contributor.departmentid4100110510
dc.contributor.departmentid4100110410
dc.contributor.organizationLuonnonvarakeskus
dc.date.accessioned2020-07-06T07:48:21Z
dc.date.accessioned2025-05-28T07:27:04Z
dc.date.available2020-07-06T07:48:21Z
dc.date.issued2021
dc.description.abstractTo achieve appropriate yield levels, inherent nitrogen (N) supply and biological N fixation are often complemented by fertilization. To avoid economic losses and negative environmental impacts due to over-application of N fertilizer, estimation of the inherent N supply is critical. We aimed to identify the roles of soil texture and organic matter in N mineralization and yield levels attained in cereal cultivation with or without N fertilization in boreal mineral soils. First, the net N mineralization and soil respiration were measured by laboratory incubation with soil samples varying in clay and organic carbon (C) contents. Secondly, to estimate the inherent soil N supply under field conditions, both unfertilized and fertilized cereal yields were measured in fields on clay soils (clay 30–78%) and coarse-textured soils (clay 0–28%). In clay soils (C 2.5–9.0%), both the net N mineralization and the cereal yields (without and with fertilization) decreased with increasing clay/C ratio. Moreover, in soils with high clay/C ratio, the agronomic N use efficiency (additional yield per kg of fertilizer N) varied considerably, indicating the presence of growth limitations other than N. In coarse-textured soils, the yield increase attained by fertilization increased with increasing organic C. Our results indicate that for clay soils in a cool and humid climate, the higher the clay content, the more organic C is needed to produce reasonable yields and to ensure efficient use of added nutrients without high N losses to the environment. For coarse soils having a rather high mean organic C of 2.3%, the organic C appeared to improve agronomic N use efficiency. For farmers, simple indicators such as the clay/C ratio or the use of non-N-fertilized control plots may be useful for site-specific adjustment of the rates of N fertilization.
dc.description.vuosik2020
dc.format.bitstreamtrue
dc.format.pagerange1497-1512
dc.identifier.olddbid488553
dc.identifier.oldhandle10024/546017
dc.identifier.urihttps://jukuri.luke.fi/handle/11111/12589
dc.identifier.urnURN:NBN:fi-fe2020070646946
dc.language.isoen
dc.okm.corporatecopublicationei
dc.okm.discipline4111
dc.okm.internationalcopublicationei
dc.okm.openaccess2 = Hybridijulkaisukanavassa ilmestynyt avoin julkaisu
dc.okm.selfarchivedon
dc.publisherJohn Wiley & Sons
dc.relation.doi10.1111/ejss.13003
dc.relation.ispartofseriesEuropean journal of soil science
dc.relation.issn1351-0754
dc.relation.issn1365-2389
dc.relation.numberinseries4
dc.relation.volume72
dc.rightsCC BY 4.0
dc.source.identifierhttps://jukuri.luke.fi/handle/10024/546017
dc.subject.ysoagricultural soil
dc.subject.ysoclay
dc.subject.ysoN mineralization
dc.subject.ysosoil carbon mineralization
dc.subject.ysosoil fertility
dc.subject.ysoyield response
dc.teh41007-00169301
dc.teh41007-00060300
dc.titleSoil organic carbon and clay content as deciding factors for net nitrogen mineralization and cereal yields in boreal mineral soils
dc.typepublication
dc.type.okmfi=A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä|sv=A1 Originalartikel i en vetenskaplig tidskrift|en=A1 Journal article (refereed), original research|
dc.type.versionfi=Publisher's version|sv=Publisher's version|en=Publisher's version|

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