Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/18793
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dc.contributor.authorAndersson, Karlen
dc.contributor.authorTighe, Matthewen
dc.contributor.authorGuppy, Christopheren
dc.contributor.authorMilham, Paulen
dc.contributor.authorMcLaren, Timothyen
dc.date.accessioned2016-04-01T14:16:00Z-
dc.date.issued2016-
dc.identifier.citationGeoderma, 264(Part A), p. 17-27en
dc.identifier.issn1872-6259en
dc.identifier.issn0016-7061en
dc.identifier.urihttps://hdl.handle.net/1959.11/18793-
dc.description.abstractAlkaline Vertisols contain calcium phosphate (CaP) minerals that dissolve in response to both acidification and the depletion of concentration of phosphorus (P) or calcium (Ca) in the soil solution, conditions commonly observed within the rhizosphere. In these soils, reserve-P is defined as the difference between the concentrations of P extracted by 0.5M sodiumbicarbonate and 0.005M sulfuric acid. Tomimic rhizosphere modification we sequentially extracted P from three alkaline Vertisols that contained concentrations of reserve-P ranging from 300 to 6500 mg kg⁻¹ using an anion sink, and a combined anion and cation sink. The extractions commenced on untreated soil, and then three target pH regimes were imposed: 1) maintain the initial pH; 2) incrementally acidify to pH 6.5 then maintain; and 3) incrementally acidify to pH 5.5 then maintain. Extractable P increased with decreasing solution pH in all soils until the acid soluble P was depleted. In each soil and at each pH level,more P was extracted when the combined sink was used compared with the anion sink alone. The release of acid soluble-P in these soils was indicative of CaP minerals of varying thermodynamic stability. In addition to the relatively constant concentrations of P extracted at the initial pH with the anion sink, moderate acidification to pH 6.5 released 9% of the reserve-P in the high P soil, but this varied from 18 to 33% in the two other soils containing lower soil P. These findings show that the release of P in alkaline soils beyond that measured by a bicarbonate extractant is influenced by the modification of soil pH and by the removal of Ca from the solution, which has implications for plant availability and response to added fertiliser. Further research is needed to identify the individual species of soil P that are involved in buffering the soil solution, and what their potential availability is to plants via rhizosphere modification.en
dc.languageenen
dc.publisherElsevier BVen
dc.relation.ispartofGeodermaen
dc.titleThe release of phosphorus in alkaline vertic soils as influenced by pH and by anion and cation sinksen
dc.typeJournal Articleen
dc.identifier.doi10.1016/j.geoderma.2015.10.001en
dc.subject.keywordsSoil Chemistry (excl. Carbon Sequestration Science)en
local.contributor.firstnameKarlen
local.contributor.firstnameMatthewen
local.contributor.firstnameChristopheren
local.contributor.firstnamePaulen
local.contributor.firstnameTimothyen
local.subject.for2008050304 Soil Chemistry (excl. Carbon Sequestration Science)en
local.subject.seo2008961402 Farmland, Arable Cropland and Permanent Cropland Soilsen
local.profile.schoolSchool of Science and Technologyen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailkander46@une.edu.auen
local.profile.emailmtighe2@une.edu.auen
local.profile.emailcguppy@une.edu.auen
local.profile.emailpmilham@une.edu.auen
local.profile.emailtmclare3@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20160324-155643en
local.publisher.placeNetherlandsen
local.format.startpage17en
local.format.endpage27en
local.identifier.scopusid84943636109en
local.peerreviewedYesen
local.identifier.volume264en
local.identifier.issuePart Aen
local.contributor.lastnameAnderssonen
local.contributor.lastnameTigheen
local.contributor.lastnameGuppyen
local.contributor.lastnameMilhamen
local.contributor.lastnameMcLarenen
dc.identifier.staffune-id:kander46en
dc.identifier.staffune-id:mtighe2en
dc.identifier.staffune-id:cguppyen
dc.identifier.staffune-id:pmilhamen
dc.identifier.staffune-id:tmclare3en
local.profile.orcid0000-0003-1027-0082en
local.profile.orcid0000-0001-7274-607Xen
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:18995en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleThe release of phosphorus in alkaline vertic soils as influenced by pH and by anion and cation sinksen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorAndersson, Karlen
local.search.authorTighe, Matthewen
local.search.authorGuppy, Christopheren
local.search.authorMilham, Paulen
local.search.authorMcLaren, Timothyen
local.uneassociationUnknownen
local.identifier.wosid000366776100003en
local.year.published2016en
local.fileurl.closedpublishedhttps://rune.une.edu.au/web/retrieve/55e2fb20-8243-4b00-89b2-d33b6651003cen
local.subject.for2020410604 Soil chemistry and soil carbon sequestration (excl. carbon sequestration science)en
local.subject.seo2020180605 Soilsen
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