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Underestimated role of legume roots for soil N fertility

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dc.contributor.authorCarranca, Corina
dc.contributor.authorTorres, Maria Odete
dc.contributor.authorMadeira, Manuel
dc.date.accessioned2019-04-03T09:47:52Z
dc.date.available2019-04-03T09:47:52Z
dc.date.issued2015
dc.descriptionResearch Articlept_PT
dc.description.abstractNitrogen (N) is a major fertilizing element for plants. The distribution of N in legumes is influencing the efficiency of the next crop. Nitrogen storage in legumes is actually estimated by N fixation in shoots, whereas there is little knowledge on the contribution of roots and nodules to legume N and soil N. Here, we studied the contribution of roots and nodules of grain and pasture legumes to plant N and soil N in Mediterranean fields. Experiments were run under rainfed conditions for a 2-year period in three regions of Portugal. Entire plants including top plant and visible roots and nodules were sampled at the end of the growing seasons for grain legumes, sweet and yellow lupine, and over two harvests in case of pastures. N2 fixation was measured for grain legumes and pasture legumes using 15N tracing. Our results show that aboveground N concentration did not vary among legumes, but differed in the belowground tissues. Field studies show that 7–11%of total legume N was associated with roots and nodules. Data also show an allocation of 11– 14 kg N fixed t−1 belowground dry matter in indeterminate legumes, which represents half the amount of total aboveground plant. This finding demonstrates that investigation relying only on shoot Nunderestimates the role of legumes for soil N fertilitypt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAgron. Sustain. Dev. (2015) 35:1095–1102pt_PT
dc.identifier.doiDOI 10.1007/s13593-015-0297-ypt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/17687
dc.language.isoengpt_PT
dc.publisherINRApt_PT
dc.subjectaboveground materialpt_PT
dc.subjectmixed permanent pasturept_PT
dc.subject15N techniquespt_PT
dc.subjectpasture typept_PT
dc.subjectsweet lupinept_PT
dc.subjectvisible root and nodulept_PT
dc.subjectyellow lupinept_PT
dc.titleUnderestimated role of legume roots for soil N fertilitypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleAgronomy and Sustainable Developmentpt_PT
person.familyNameTorres
person.givenNameMaria Odete
person.identifier.orcid0000-0002-4905-710X
person.identifier.scopus-author-id7402581445
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationab73dde0-a508-4384-8626-d62051e5d100
relation.isAuthorOfPublication.latestForDiscoveryab73dde0-a508-4384-8626-d62051e5d100

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