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dc.contributor.authorChynoweth, Richard
dc.contributor.authorTrethewey, Jason
dc.contributor.authorRolston, MP
dc.contributor.authorMcCloy, BL
dc.coverage.spatialAlexandra, Central Otago
dc.date.accessioned2019-01-31T02:01:36Z
dc.date.issued2014
dc.identifier.citationChynoweth, R.J., Trethewey, J.A.K., Rolston, M.P., & McCloy, B.L. (2014). Reduced stem length increases perennial ryegrass seed yield. Agronomy New Zealand, 44, 61-70.
dc.identifier.issn0110-6589
dc.identifier.urihttps://hdl.handle.net/10182/10465
dc.description.abstractThe effect of plant growth regulators inducing severe stem shortening on the seed production of perennial ryegrass (Lolium perenne) was investigated over two seasons in Canterbury using the tretraploid, late season cultivars ‘Halo’ (2012-13) and ‘Bealey’ (2013-14). Stem shortening was achieved through the application of Moddus® (active ingredient 250 g/l trinexapac-ethyl, TE) either alone or in combination with Payback™ (active ingredient 250 g/l paclobutrazol, PB) and ‘Cycocel®’ (active ingredient 750 g/l chlormequat-chloride, CCC). Trinexapac ethyl applied as a single application at Zadoks growth stage 32 increased seed yield by up to 44% as rates increased from the untreated (1720 kg/ha) to 3.2 l/ha (2470 kg/ha). Where TE was applied in sequences (Zadoks growth stages 30, 32 and 39) seed yield was increased by 59% to 2730 kg/ha. Combinations of TE, PB and CCC increased seed yields by up to 95% (3360 kg/ha) above the untreated control. Seed yield increase was achieved through an increased number of seeds/m². Total stem length was reduced from 105 cm to 85 cm by applications of TE alone and further to 65 cm where applications of TE, PB and CCC were applied in combination. On average, each centimetre of stem length reduction increased seed yield by 45 kg/ha. Stem length reduction was associated with delayed onset of lodging and absolute lodging at harvest, where only crops shorter than 71 cm remained standing at harvest. These results suggest that growers should aim to shorten ryegrass stem lengths to approximately 70 cm to reduce lodging and maximise seed yields.
dc.format.extentpp.61-70
dc.language.isoen
dc.publisherAgronomy Society of New Zealand
dc.relationThe original publication is available from Agronomy Society of New Zealand - https://www.agronomysociety.org.nz/page/409762
dc.rights© The authors, 2014
dc.source44th Agronomy Society Conference
dc.subjectchlormequat chloride
dc.subjectLolium perenne
dc.subjectpaclobutrazole
dc.subjectplant growth regulator
dc.subjecttrinexapac-ethyl
dc.titleReduced stem length increases perennial ryegrass seed yield
dc.typeConference Contribution - published
lu.contributor.unitLincoln University
lu.contributor.unitFaculty of Agriculture and Life Sciences
lu.contributor.unitDepartment of Agricultural Sciences
lu.contributor.unitLincoln Agritech
dc.subject.anzsrc070302 Agronomy
dc.relation.isPartOfAgronomy New Zealand
pubs.finish-date2014
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|Lincoln Agritech
pubs.publication-statusPublished
pubs.publisher-urlhttps://www.agronomysociety.org.nz/page/409762
pubs.start-date2014
pubs.volume44
lu.identifier.orcid0000-0002-1586-7366
lu.subtypeConference Paper


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