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dc.contributor.authorDomenicano, Susy
dc.contributor.authorColl Mir, Lluís
dc.contributor.authorMessier, Christian
dc.contributor.authorBerninger, Frank
dc.date.accessioned2020-03-31T09:25:12Z
dc.date.available2020-03-31T09:25:12Z
dc.date.issued2011-03-02
dc.identifier.issn0169-4286
dc.identifier.urihttp://hdl.handle.net/10459.1/68390
dc.description.abstractThe study analyses the effects of two different forms of nitrogen fertilisation (nitrate and ammonium) on root structure and water uptake of two hybrid poplar (Populus maximowiczii x P. balsamifera) clones in a field experiment. Water uptake was studied using sap flow gauges on individual proximal roots and coarse root structure was examined by excavating 18 whole-root systems. Finer roots were scanned and analyzed for architecture. Nitrogen forms did not affect coarse-root system development, but had a significant effect on fine-root development. Nitrate-treated trees presented higher fine:coarse root ratios and higher specific root lengths than control or ammonium treated trees. These allocation differences affected the water uptake capacity of the plants as reflected by the higher sapflow rate in the nitrate treatment. The diameter of proximal roots at the tree base predicted well the total root biomass and length. The diameter of smaller lateral roots also predicted the lateral root mass, length, surface area and the number of tips. The effect of nitrogen fertilisation on the fine root structure translated into an effect on the functioning of the fine roots forming a link between form (architecture) and function (water uptake).ca_ES
dc.description.sponsorshipThis project was made possible through several funding sources: a Collaborative Research and Development NSERC grant for a project titled: Soil fertility and productivity of poplar plantations in southern Quebec (awarded to Dr. James Fyles of McGill and co-researchers including Dr. Christian Messier), a Canada Research Chair in Forest Productivity (awarded to Dr. Frank Berninger), an internal UQÀM subsidy (PARFAC awarded to Dr. Frank Berninger) and a FARE bursary awarded to Susy Domenicano (UQÀM). LC was supported by a Ramon y Cajal contract (RYC-2009-04985) from the Ministerio de Ciencia e Innovación of Spain.ca_ES
dc.language.isoengca_ES
dc.publisherSpringer Natureca_ES
dc.relation.isformatofVersió preprint del document publicat a: https://doi.org/10.1007/s11056-011-9256-xca_ES
dc.relation.ispartofNew Forests, 2011, vol. 42, núm. 3, p. 347-362ca_ES
dc.rights(c) Springer Science+Business Media B.V., 2011ca_ES
dc.subjectNitrogen fertilisationca_ES
dc.subjectHybrid poplarsca_ES
dc.subjectRoot structureca_ES
dc.subjectFine rootsca_ES
dc.subjectProximal rootsca_ES
dc.subjectWater uptakeca_ES
dc.titleNitrogen forms affect root structure and water uptake in the hybrid poplarca_ES
dc.typeinfo:eu-repo/semantics/articleca_ES
dc.identifier.idgrec028866
dc.type.versioninfo:eu-repo/semantics/submittedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_ES
dc.identifier.doihttps://doi.org/10.1007/s11056-011-9256-x


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