Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/14491
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dc.contributor.authorSerafin, Lorettaen
dc.contributor.authorBelfield, Stephanieen
dc.contributor.authorHerridge, Daviden
local.source.editorEditor(s): B George-Jaeggli, DJ Jordanen
dc.date.accessioned2014-04-02T12:13:00Z-
dc.date.issued2010-
dc.identifier.citationProceedings of the 1st Australian Summer Grains Conference, p. 1-5en
dc.identifier.urihttps://hdl.handle.net/1959.11/14491-
dc.description.abstractOptimising grain yields and oil contents of sunflower within seasonal climatic constraints is critical to maximising profitability. While yields have on average continued to increase, growers often struggle to achieve oil contents above the industry standard of 40%. Since a bonus/discount system applies for oil contents above or below 40%, it would be beneficial for farmers to have tools available to target particular oil contents. The balance of nitrate and water in the soil profile at sowing has been utilised to target protein contents of cereal crops. Protein and oil contents of grains are inversely related. Thus, we hypothesised that a similar approach could be used to target oil contents of sunflower. Data on soil nitrate and water levels (1.5m depth) at sowing, grain yield and oil contents were collected from four nitrogen rate experiments in northern New South Wales and subjected to regression analysis. Fertiliser N rates were zero, 50, 75, 100, 125, 150 and 200 kg N/ha. Sowing soil water levels were in the range 137-207 mm. As nitrogen supply increased and the ratio of soil nitrate:water increased from 0.35 to 1.8, grain oil contents declined from 45 to 37%. Grain yields showed a slight decline through the nitrate:water range also. Matching nitrate:water at ratios 0.5-1.0 optimised oil contents above the required industry standard of 40% as well as grain yield. Oil contents were, on average, <40% when the nitrate:water ratio was >1.0. These results suggest that sunflower oil contents may be more specifically targeted and fertiliser N inputs more accurately determined for optimum profitability.en
dc.languageenen
dc.publisherGrains Research and Development Corporation (GRDC)en
dc.relation.ispartofProceedings of the 1st Australian Summer Grains Conferenceen
dc.relation.ispartofseriesEdited Paperen
dc.titleManaging Nitrogen to Optimise Sunflower Yield and Oil contenten
dc.typeConference Publicationen
dc.relation.conferenceAustralian Summer Grains Conference 2010: 'Opportunity through Unity'en
dc.subject.keywordsCrop and Pasture Nutritionen
dc.subject.keywordsAgronomyen
local.contributor.firstnameLorettaen
local.contributor.firstnameStephanieen
local.contributor.firstnameDaviden
local.subject.for2008070306 Crop and Pasture Nutritionen
local.subject.for2008070302 Agronomyen
local.subject.seo2008829899 Environmentally Sustainable Plant Production not elsewhere classifieden
local.subject.seo2008820499 Summer Grains and Oilseeds not elsewhere classifieden
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailloretta.serafin@industry.nsw.gov.auen
local.profile.emailsbelfie3@une.edu.auen
local.profile.emaildherridg@une.edu.auen
local.output.categoryE1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20140319-100325en
local.date.conference21st - 24th June, 2010en
local.conference.placeGold Coast, Australiaen
local.publisher.placeCanberra, Australiaen
local.format.startpage1en
local.format.endpage5en
local.peerreviewedYesen
local.contributor.lastnameSerafinen
local.contributor.lastnameBelfielden
local.contributor.lastnameHerridgeen
dc.identifier.staffune-id:sbelfie3en
dc.identifier.staffune-id:dherridgen
local.profile.orcid0000-0002-0423-2517en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:14706en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleManaging Nitrogen to Optimise Sunflower Yield and Oil contenten
local.output.categorydescriptionE1 Refereed Scholarly Conference Publicationen
local.relation.urlhttp://www.grdc.com.au/Resources/2010ASGCen
local.relation.urlhttp://www.grdc.com.au/uploads/documents/2010ASGCEditedPapersPDF/Serafin_ManagingNitrogen_edited_paper.pdfen
local.conference.detailsAustralian Summer Grains Conference 2010: 'Opportunity through Unity', Gold Coast, Australia, 21st - 24th June, 2010en
local.search.authorSerafin, Lorettaen
local.search.authorBelfield, Stephanieen
local.search.authorHerridge, Daviden
local.uneassociationUnknownen
local.year.published2010en
local.date.start2010-06-21-
local.date.end2010-06-24-
Appears in Collections:Conference Publication
School of Environmental and Rural Science
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