Nitrogen acquisition by two U. humidicola genotypes differing in biological nitrification inhibition (BNI) capacity and associated microorganisms

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dc.creatorTeutscherová, Nikola
dc.creatorVázquez, Eduardo
dc.creatorLehndorff, Eva
dc.creatorPulleman, Mirjam Margreet
dc.creatorArango, Jacobo
dc.date2022-04
dc.date2022-08-29T10:37:08Z
dc.date2022-08-29T10:37:08Z
dc.date.accessioned2026-06-27T13:22:54Z
dc.descriptionBiological nitrification inhibition (BNI) has been considered a plant strategy to increase N use efficiency by reducing N losses via N2O emissions or nitrate leaching. However, recent studies have revealed no difference in gross nitrate production among Urochloa humidicola genotypes with previously described high- and low-BNI capacity and pointed towards a crucial role for microbial N immobilization. In the current greenhouse study, we compared the 15 N acquisition by two U. humidicola genotypes (with high- and low-BNI capacity) and their soil-associated microorganisms at four points in time after fertilization (50 kg N ha−1). Soil microorganisms slightly out-competed both genotypes during the first 24 h after fertilization, and microorganisms associated with high-BNI genotype immobilized more N than microbes associated with low-BNI plants. Nevertheless, by the end of the experiment, low-BNI plant genotype had acquired more 15 N, despite higher to N2O emissions. Furthermore, higher 15 N root-to-shoot transfer was observed in low-BNI plants, potentially indicating higher contribution of nitrate to plant N uptake. In conclusion, our results confirm higher importance of microbial N immobilization in high-BNI genotypes, at least in the short-term. However, this did not result in higher N uptake by the high BNI genotype during the first 3 weeks after fertilization as could be expected. Long-term field studies are required to better understand the implications of direct (BNI sensu stricto) and indirect mechanisms (including differences in rhizosphere microbial biomass, activity and composition between high- and low-BNI genotypes), processes on plant N use efficiency, N storage in soil, and N losses to the environment.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/120957
dc.identifier.urihttp://hdl.handle.net/123456789/57611
dc.languageen
dc.publisherSpringer
dc.rightsOpen Access
dc.sourceTeutscherová, N.; Vázquez, E.; Lehndorff, E.; Pulleman, M.; Arango, J. (2022) Nitrogen acquisition by two U. humidicola genotypes differing in biological nitrification inhibition (BNI) capacity and associated microorganisms. Biology and Fertility of Soils 58, p. 355–364. ISSN: 0178-2762
dc.subjectbreeding
dc.subjectnitrogen
dc.subjectnitrification inhibitors
dc.subjectfertilization
dc.subjectbrachiaria humidicola
dc.subjecturochloa
dc.subjectmejora
dc.subjectnitrógeno
dc.subjectinhibidores de la nitrificación
dc.subjectfecundación
dc.subjectmicrobiology
dc.titleNitrogen acquisition by two U. humidicola genotypes differing in biological nitrification inhibition (BNI) capacity and associated microorganisms
dc.typeJournal Article

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