Show simple item record

dc.contributor.authorMcLenaghen, Roger D.en
dc.contributor.authorRandhawa, P. S.en
dc.contributor.authorCondron, Leo M.en
dc.contributor.authorDi, Hong J.en
dc.date.accessioned2008-03-17T04:02:37Z
dc.date.issued2004en
dc.identifier.urihttps://hdl.handle.net/10182/349
dc.description.abstractLegumes have been shown to increase the dissolution and utilisation of phosphate rock (PR) phosphorus (P) compared with non-legumes because of their acidifying effect on the rhizosphere. A promising agronomic approach for optimising nutrient availability in organic cropping systems appears to be the integration of legume green manures (GM) into the cropping rotation. A field experiment was conducted to study the combined effect of legume growth (in terms of improved P utilisation from PR) and subsequent organic matter additions (green manure incorporation) on crop growth compared with a corresponding winter fallow system. Three rates of PR (0, 60, 120 kg P/ha) were applied in autumn before sowing of lupin green manure and maize as the crop. A fourth PR treatment involving the application of 60 kg P/ha as PR in spring, before maize sowing was also employed. The objective of the study was to quantify the impact of preceding lupin (green manure), treated or not treated with PR, on a subsequent maize crop, and to evaluate winter fallow and green manure effects in terms of P availability. The observed improvements in maize yields following green manuring and PR application of approximately 1.5t/ha and the 3.1-5.3 kg/ha increase in P uptake by maize in the first season were due to a combination of P release into soil solution following the mineralisation of organic P additions via the lupin GM and increased solubilisation of residual P due to rhizosphere and possible mycorrhiza colonisation processes.en
dc.language.isoenen
dc.publisherLincoln Universityen
dc.relationThe original publication is available from - Lincoln Universityen
dc.sourceSuperSoil 2004: 3rd Australian New Zealand Soils Conferenceen
dc.subjectResin-Pen
dc.subjectmineralisationen
dc.subjectLupinus angustifoliusen
dc.subjectZea maysen
dc.titleIncreasing phosphate rock availability using a lupin green manure cropen
dc.typeConference Contribution - Published
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300200 Crop and Pasture Production::300205 Agronomyen
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Soil and Physical Sciencesen
pubs.finish-date2004-12-09en
pubs.notesPaper presented at: SuperSoil 2004: 3rd Australian New Zealand Soils Conference, 5 – 9 December 2004, University of Sydney, Australia. http://www.regional.org.au/au/asssi/supersoil2004/en
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/SOILS
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/QE18
pubs.publication-statusPublisheden
pubs.start-date2004-12-05en
lu.identifier.orcid0000-0002-3082-994X
lu.identifier.orcid0000-0002-6966-0299
lu.identifier.orcid0000-0002-8956-1917
lu.subtypeConference Paperen


Files in this item

Default Thumbnail

This item appears in the following Collection(s)

Show simple item record