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Concentrações e fluxos de nutrientes no gotejo e escorrimento do tronco de Fraxinus angustifolia Vahl.

dc.contributor.authorPereira, Ermelinda
dc.contributor.authorMadeira, Manuel
dc.contributor.authorAbreu, Francisco Gonçalves
dc.date.accessioned2011-01-20T16:50:22Z
dc.date.available2011-01-20T16:50:22Z
dc.date.issued2009
dc.description.abstractAvaliou-se a concentração e os fluxos de nutrientes no gotejo e no escorrimento do tronco de freixo (Fraxinus angustifolia Vahl), num lameiro do Nordeste de Portugal. A precipitação bruta, a precipitação sob coberto (throughfall) e o escorrimento do tronco (stemflow) foram objecto de monitorização e amostras foram colhidas periodicamente para determinação do pH, dos teores de carbono (COD) e azoto (NOD) orgânicos dissolvidos e de nutrientes. Os fluxos anuais de COD, NOD, Cl, K, Na, Ca, Mg e P na precipitação bruta foram, respectivamente, 3.93, 0.92, 0.20, 0.06, 1.81, 2.40, 1.11, 1.16, 0.29 e 0.06 g m-2, enquanto no gotejo foram de 4,42, 0,20, 1,82, 1,82, 0,31, 0,54, 0,62, 0.20 g m-2; o fluxo de N-NH4 + foi nulo e o de N-NO- 3 foi negativo (-0,03 g m-2). A expressão dos fluxos devido ao escorrimento do tronco variará com a área influenciada por esta solução. A restituição de nutrientes ao solo pelo gotejo e pelo escorrimento do tronco poderá contribuir para diferenciar as características do solo sob a copa das árvores.por
dc.description.abstractThe effect of the ash-tree (Fraxinus angustifolia Vahl) crown on characteristics of throughfall and stemflow solutions was assessed in wet pastures located in north eastern Portugal. The amounts de gross rainfall, throughfall and stemflow were measured continuously and samples were periodically collected to determine pH, dissolved organic C (DOC) and N (DON), and nutrients. The annual fluxes of DOC, DON, Cl, K, Na, Ca, Mg and P in gross rainfall were, respectively, 3.93, 0.92, 0.20, 0.06, 1.81, 2.40, 1.11, 1.16, 0.29 and 0.06 g m-2, while those regarding throughfall were 4.42, 0.20, 1.82, 1.82, 0.31, 0.54, 0.62 and 0.20 g m-2; the flux of N-NH4 + was nil and that of N-NO- 3 was negative (-0.03 g m-2). The fluxes in relation with stemflow were small if expressed on a tree crown projection area basis, but can be much greater if the actual area affected is considered. The amounts and distribution of nutrients turned to the soil by throughfall and stemflow may lead to soil chemical characteristics differentiation beneath tree crowns.
dc.identifier.citationPereira, Ermelinda; Madeira, Manuel; Abreu , Francisco Gonçalves de (2009). Concentrações e fluxos de nutrientes no gotejo e escorrimento do tronco de Fraxinus angustifolia Vahl. Revista de Ciências Agrárias. ISSN 0871-018X. 32:2, p.123-134por
dc.identifier.issn0871-018X
dc.identifier.urihttp://hdl.handle.net/10198/3154
dc.language.isoporpor
dc.peerreviewedyespor
dc.publisherSociedade de Ciências Agrárias de Portugalpor
dc.relationPAMAF 8047; AGRO 207por
dc.subjectFreixopor
dc.subjectGotejopor
dc.subjectNutrientespor
dc.subjectPrecipitação brutapor
dc.subjectSolopor
dc.titleConcentrações e fluxos de nutrientes no gotejo e escorrimento do tronco de Fraxinus angustifolia Vahl.por
dc.title.alternativeNutrient concentrations and fluxes in the throughfall and stemflow of Fraxinus angustifolia Vahl.por
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage134por
oaire.citation.issue32(2)por
oaire.citation.startPage123por
oaire.citation.titleRevista de Ciências Agráriaspor
person.familyNamePereira
person.givenNameErmelinda
person.identifier.ciencia-id3916-218E-1629
person.identifier.orcid0000-0002-9431-5059
person.identifier.scopus-author-id35222107200
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication9d6b3744-286d-42bc-b363-533450bdb07c
relation.isAuthorOfPublication.latestForDiscovery9d6b3744-286d-42bc-b363-533450bdb07c

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