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dc.contributor.authorBerenji, Saman
dc.contributor.authorMoot, Derrick J.
dc.contributor.authorMoir, James L.
dc.contributor.authorRidgway, Hayley J.
dc.date.accessioned2020-05-04T00:33:48Z
dc.date.issued2015-11
dc.identifier.issn2463-2872en
dc.identifier.urihttps://hdl.handle.net/10182/11813
dc.description.abstractThis paper quantifies the effect of inoculation and lime on lucerne growth and nitrogen fixation over the establishment and following season. The field experiment at Ashley Dene, in Canterbury, had an initial soil pH of 5.2 and moderate exchangeable aluminium content (4.2 mg/kg). The ¹⁵N natural abundance (δ¹⁵N) method was used to quantify nitrogen fixation. The pH of the top-soil was increased to ca. 5.5 and the Al content was decreased to 2.0 and 1.3 mg/kg soil by the application of 1 and 2 t lime/ha, respectively. In Year 0 the dry matter yield increased from 3 to 4 t DM/ha with the addition of 2 t lime/ha. The nitrogen content of lucerne plants was 2.2% (w/w), and was unaffected by inoculant or lime in Year 0. Similarly, the δ¹⁵N was 0.81‰ and unaffected by inoculant or lime. In Year 1, the N percentage of inoculated lucerne plants was 4.2% (w/w) compared with 3.6% in uninoculated plants. The δ¹⁵N value was 0.81‰ in uninoculated plants compared with -0.23‰ in inoculated lucerne plants. The inoculated lucerne yielded 7.8 t DM/ha compared with 2.4 t DM/ha when uninoculated. The calculated proportion of legume N derived from atmospheric N₂ (%Ndfa) estimated that 70% of the nitrogen content in the inoculated lucerne shoots was derived from nitrogen-fixation in Year 1. There was no effect of lime on lucerne DM, or δ¹⁵N values in Year 1. This suggests lucerne rhizobia tolerated moderate levels of Al in acidic soils. The application of lime and inoculant are therefore recommended for lucerne, particularly in areas where there is no history of lucerne. The available soil N was sufficient to meet crop demand in the establishing year. Lucerne was then reliant on biological nitrogen fixation for yield in Year 1 which suggests lucerne preferentially used soil available N in Year 0, before commencing N fixation.en
dc.format.extent109-116en
dc.language.isoen
dc.publisherNew Zealand Grassland Association
dc.relationThe original publication is available from - New Zealand Grassland Association - https://www.grassland.org.nz/viewpublication.php?pubID=389en
dc.rights© The authors and NZGA
dc.subjectaluminiumen
dc.subjectlucerneen
dc.subjectlimeen
dc.subjectMedicago sativa L.en
dc.subjectnitrogen fixationen
dc.titleLucerne dry matter and N-fixation, when sown with or without lime and inoculanten
dc.typeJournal Article
lu.contributor.unitLincoln University
lu.contributor.unitFaculty of Agriculture and Life Sciences
lu.contributor.unitDepartment of Agricultural Sciences
lu.contributor.unitDepartment of Pest Management and Conservation
lu.contributor.unitDepartment of Soil and Physical Sciences
dc.subject.anzsrc070302 Agronomyen
dc.subject.anzsrc0703 Crop and Pasture Productionen
dc.subject.anzsrc0701 Agriculture, Land and Farm Managementen
dc.relation.isPartOfJournal of New Zealand Grasslandsen
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/AGSC
pubs.organisational-group/LU/Agriculture and Life Sciences/ECOL
pubs.organisational-group/LU/Agriculture and Life Sciences/SOILS
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/PE20
pubs.organisational-group/LU/Research Management Office/QE18
pubs.publication-statusPublisheden
pubs.publisher-urlhttps://www.grassland.org.nz/viewpublication.php?pubID=389en
pubs.volume77en
dc.identifier.eissn2463-2880en
lu.identifier.orcid0000-0002-5691-4915
lu.identifier.orcid0000-0001-6677-3901


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