Gross N transformation rates in soil system with contrasting Urochloa genotypes do not confirm the relevance of BNI as previously assessed in-vitro

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cg.authorship.typesCGIAR and advanced research instituteen
cg.contributor.affiliationInternational Center for Tropical Agricultureen
cg.contributor.affiliationCzech University of Life Sciencesen
cg.contributor.affiliationCharles Universityen
cg.contributor.affiliationJapan International Research Center for Agricultural Sciencesen
cg.contributor.crpClimate Change, Agriculture and Food Security
cg.creator.identifierMirjam Pulleman: 0000-0001-9950-0176
cg.creator.identifierJacobo Arango: 0000-0002-4828-9398
cg.creator.identifierDaniel M. Villegas: 0000-0001-6801-3332
cg.identifier.doihttps://doi.org/10.1007/s00374-021-01610-zen
cg.isijournalISI Journalen
cg.issn0178-2762en
cg.issue3en
cg.journalBiology and Fertility of Soilsen
cg.reviewStatusPeer Reviewen
cg.subject.alliancebiovciatLIVESTOCKen
cg.subject.alliancebiovciatTROPICAL FORAGESen
cg.subject.impactAreaClimate adaptation and mitigation
cg.subject.sdgSDG 2 - Zero hungeren
cg.volume58en
dc.contributor.authorTeutscherová, Nikolaen
dc.contributor.authorVázquez, Eduardoen
dc.contributor.authorTrubač, Jakuben
dc.contributor.authorVillegas, Daniel Mauricioen
dc.contributor.authorSubbarao, Guntur V.en
dc.contributor.authorPulleman, Mirjam Margreeten
dc.contributor.authorArango, Jacoboen
dc.date.accessioned2022-02-17T10:25:06Zen
dc.date.available2022-02-17T10:25:06Zen
dc.identifier.urihttps://hdl.handle.net/10568/118150
dc.titleGross N transformation rates in soil system with contrasting Urochloa genotypes do not confirm the relevance of BNI as previously assessed in-vitroen
dcterms.abstractThe capacity of several plant species or landraces to inhibit nitrification in soil (biological nitrification inhibition, BNI) has been assessed in certain tropical pastures. These assessments are commonly based on potential net nitrification rates, which do not differentiate between gross nitrification and other processes that may reduce the amount of nitrate in soil. In a greenhouse experiment using two genotypes of Urochloa humidicola with contrasting BNI capacity in vitro, we evaluated gross N transformation rates before and after (7 and 21 days) N fertilization, while periodically measuring N2O emissions. Gross nitrification rates (in fact gross nitrate production assessed by pool dilution technique) were comparable in both genotypes and were low in comparison to strong microbial NH4+ immobilization. The N2O emissions were higher in pots with low-BNI plants. The discrepancy between the potential net nitrification rates assessed in laboratory assays (higher in low-BNI plants) and gross nitrification in pot or field experiments (no differences between genotypes) can be attributed to the out-competition of ammonia oxidizers by plant N uptake and ammonia immobilizing heterotrophic microbes, resulting in low nitrification under conditions where growing plants are present. This study confirmed the capacity of certain U. humidicola genotypes to reduce N2O emissions but warrants further investigation of the underlying mechanisms. It also questions the relevance of BNI in the rhizosphere of this plant species as other mechanisms (rather than the inhibition of gross nitrification) seem to be more important in maintaining low-nitrate soil environments in soil–plant systems of U. humidicola.en
dcterms.accessRightsLimited Access
dcterms.audienceScientistsen
dcterms.available2021-11-24
dcterms.bibliographicCitationTeutscherová, N.; Vázquez, E.; Trubač, J.; Villegas, D.M.; Subbarao, G.V.; Pulleman, M.; Arango, J. (2021) Gross N transformation rates in soil system with contrasting Urochloa genotypes do not confirm the relevance of BNI as previously assessed in-vitro. Biology and Fertility of Soils 11 p. ISSN: 0178-2762en
dcterms.extentp. 321-331en
dcterms.issued2022-04
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherSpringeren
dcterms.subjectforageen
dcterms.subjectnitrification inhibitorsen
dcterms.subjectbiological nitrogen fixationen
dcterms.subjecturochloaen
dcterms.subjectforrajesen
dcterms.subjectinhibidores de la nitrificaciónen
dcterms.subjectfijación biológica del nitrógenoen
dcterms.typeJournal Article

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This is an Accepted Manuscript of an article published by Springer in Biology and Fertility of Soils journal on 24 November 2021, available online: https://doi.org/10.1007/s00374-021-01610-z
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