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Phosphorus mobility in a karst landscape under pasture grazing system

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dc.contributor.authorAlloush, Ghiath A.en
dc.contributor.authorBoyer, D. G.en
dc.contributor.authorBelesky, David Paulen
dc.contributor.authorHalvorson, Jonathan J.en
dc.contributor.departmentSchool of Plant and Environmental Sciencesen
dc.date.accessed2014-05-08en
dc.date.accessioned2014-05-14T17:03:35Zen
dc.date.available2014-05-14T17:03:35Zen
dc.date.issued2003-11en
dc.description.abstractThe spatial distribution and partitioning of water dissolved phosphorus fractions in the soil profile of a grazed karst sinkhole landscape were investigated. We also measured P fractions in surface runoff entering a sinkhole drain and in karst spring flow draining the study area. Grazing increased total N, C, and all forms of P of soil. Dissolved inorganic orthophosphate (DPi) was the highest in the surface soil layer and diminished significantly with depth. The proportion of dissolved unreactive phosphorus (DPu) increased with soil depth. Changes in DPu with landscape position and depth were closely correlated with changes in dissolved organic carbon (DOC) suggesting that the mobility and transport of DPu was mediated by DOC. Landscape position sampling showed molybdate reactive phosphorus (MRP) and DPu increased toward the bottom and center of sinkholes. The distribution of DPi and DPu in surface runoff and that occurring in underground watercourses confirms the significance of DPu transported into karst groundwater.en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationG. Alloush; D. Boyer; D. Belesky; J. Halvorson., "Phosphorus mobility in a karst landscape under pasture grazing system," Agronomie 23, 7, 593-600 (2003). DOI: 10.1051/agro:2003033en
dc.identifier.doihttps://doi.org/10.1051/agro:2003033en
dc.identifier.issn0249-5627en
dc.identifier.urihttp://hdl.handle.net/10919/48024en
dc.identifier.urlhttp://hal.archives-ouvertes.fr/hal-00886211/en
dc.language.isoenen
dc.publisherEDP Sciencesen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectphosphorus transporten
dc.subjectdissolved unreactive phosphorusen
dc.subjectmolybdateen
dc.subjectreactive phosphorusen
dc.subjectkarsten
dc.subjectgrazing impactsen
dc.subjectmolybdate reactive phosphorusen
dc.subjectsoil solutionen
dc.subjectorganic phosphorusen
dc.subjectWateren
dc.subjectgrasslanden
dc.subjectformsen
dc.subjectadsorptionen
dc.subjectleachateen
dc.subjectrainfallen
dc.subjectreleaseen
dc.subjectagronomyen
dc.titlePhosphorus mobility in a karst landscape under pasture grazing systemen
dc.title.serialAgronomieen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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