Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/9514
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dc.contributor.authorTavakkoli, Ehsanen
dc.contributor.authorLyons, Grahamen
dc.contributor.authorEnglish, Peter Warrenen
dc.contributor.authorGuppy, Christopheren
dc.date.accessioned2012-02-21T19:04:00Z-
dc.date.issued2011-
dc.identifier.citationJournal of Plant Nutrition and Soil Science, 174(3), p. 437-446en
dc.identifier.issn1522-2624en
dc.identifier.issn1436-8730en
dc.identifier.urihttps://hdl.handle.net/1959.11/9514-
dc.description.abstractSilicon (Si) is a beneficial element for tropical grasses such as rice ('Oryza sativa') and responses to applications of Si are common on highly weathered soils. However, the importance of pH (and hence Si speciation), weathering and fertilisation on Si uptake is still poorly understood. The responses of rice to Si fertilisation were studied in two variably weathered basalt soils (Red Ferrosol, Grey Vertosol) adjusted at different pH values (5.5-9.5) with three levels of acidulated wollastonite. Soil Si was extracted using deionised water (H₂O), 0.01 M CaCl₂, or 0.5 M NH₄OAc. Significant increases in Si uptake and rice biomass were observed in the Red Ferrosol following fertilisation (p < 0.01). Greater biomass production was observed at lower pH, due to decreased Si sorption and higher solution Si concentrations. Silicon uptake by rice was greater at low pH, despite similar extractable Si concentrations; suggesting a relationship between Si speciation and uptake. In contrast, Si uptake and rice shoot dry matter in the less weathered Grey Vertosol were unaffected by Si fertilisation (p > 0.05) except at the highest rate and lowest pH (5.5). Solution Si concentrations were controlled by precipitation/polymerisation reactions in equilibrium with specific soil pH values rather than adsorption processes. Silicon speciation effects (monosilicic acid vs. silicate ions) were unable to be measured due to an induced phosphorus deficiency in both soils at pH values > 8.5. In conclusion, weathered soils are more responsive to Si fertilisation and Si uptake is increased at low pH.en
dc.languageenen
dc.publisherWiley-VCH Verlag GmbH & Co KGaAen
dc.relation.ispartofJournal of Plant Nutrition and Soil Scienceen
dc.titleSilicon nutrition of rice is affected by soil pH, weathering and silicon fertilisationen
dc.typeJournal Articleen
dc.identifier.doi10.1002/jpln.201000023en
dc.subject.keywordsSoil Chemistry (excl Carbon Sequestration Science)en
dc.subject.keywordsCrop and Pasture Nutritionen
local.contributor.firstnameEhsanen
local.contributor.firstnameGrahamen
local.contributor.firstnamePeter Warrenen
local.contributor.firstnameChristopheren
local.subject.for2008050304 Soil Chemistry (excl Carbon Sequestration Science)en
local.subject.for2008070306 Crop and Pasture Nutritionen
local.subject.seo2008820402 Riceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailpenglis3@une.edu.auen
local.profile.emailcguppy@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20111130-125947en
local.publisher.placeGermanyen
local.format.startpage437en
local.format.endpage446en
local.identifier.scopusid79957828648en
local.peerreviewedYesen
local.identifier.volume174en
local.identifier.issue3en
local.contributor.lastnameTavakkolien
local.contributor.lastnameLyonsen
local.contributor.lastnameEnglishen
local.contributor.lastnameGuppyen
dc.identifier.staffune-id:penglis3en
dc.identifier.staffune-id:cguppyen
local.profile.orcid0000-0001-7274-607Xen
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:9705en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleSilicon nutrition of rice is affected by soil pH, weathering and silicon fertilisationen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorTavakkoli, Ehsanen
local.search.authorLyons, Grahamen
local.search.authorEnglish, Peter Warrenen
local.search.authorGuppy, Christopheren
local.uneassociationUnknownen
local.identifier.wosid000291361500011en
local.year.published2011en
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