Relationships between dry matter yield and height of rotationally grazed dryland lucerne

dc.contributor.authorMills, Annamaria
dc.contributor.authorSmith, Malcolm
dc.contributor.authorMoot, Derrick
dc.date.accessioned2018-03-26T03:35:09Z
dc.date.available2016-01-01
dc.date.issued2016
dc.description.abstractBetween 2009/2010 and 2014/2015 a total of 711 destructive paired samples of total dry matter yield (kg DM/ha) and lucerne height were taken from a grazed dryland lucerne monoculture experiment at Ashley Dene, Canterbury, New Zealand. These were used to develop relationships suitable for on-farm estimates of lucerne. For pre-graze yields, the variation accounted for increased from 59%, based on lucerne height alone, to 84% for the 14 Year/Season combinations. For postgrazing residual DM yields, inclusion of Year as a factor increased the R2 from 0.39 to 0.65. Pre-graze data were also grouped into spring, summer and autumn. These relationships accounted for 54-60% of the observed variation in dryland lucerne. In spring the multiplier was ~95 kg DM/cm and this dropped to ~75 kg DM/cm for heights measured in the summer. In autumn the multiplier was ~55 kg DM/cm. Lack of stability in the relationships over time could reflect environmental conditions and changes in stand density which height measurements alone cannot account for.
dc.format.extentpp.185-196
dc.identifier.citationMills, A.M., Smith, M.C., & Moot, D.J. (2016). Relationships between dry matter yield and height of rotationally grazed dryland lucerne. Journal of New Zealand Grasslands, 78, 185-196. Available from https://www.grassland.org.nz/publications/nzgrassland_publication_2832.pdf
dc.identifier.doi10.33584/jnzg.2016.78.504
dc.identifier.eissn2463-2880
dc.identifier.issn2463-2872
dc.identifier.urihttps://hdl.handle.net/10182/9195
dc.language.isoen
dc.publisherNew Zealand Grassland Association
dc.relationThe original publication is available from New Zealand Grassland Association - https://doi.org/10.33584/jnzg.2016.78.504 - https://www.grassland.org.nz/viewpublication.php?pubID=399
dc.relation.isPartOfJournal of New Zealand Grasslands
dc.relation.urihttps://doi.org/10.33584/jnzg.2016.78.504
dc.rightsCopyright © The author(s) and NZGA.
dc.subjectalfalfa
dc.subjectdry matter yield estimates
dc.subjectheight
dc.subjectMedicago sativa L.
dc.subjectregression analysis
dc.subject.anzsrcANZSRC::0703 Crop and Pasture Production
dc.subject.anzsrcANZSRC::070302 Agronomy
dc.titleRelationships between dry matter yield and height of rotationally grazed dryland lucerne
dc.typeJournal Article
lu.contributor.unitLincoln University
lu.contributor.unitFaculty of Agriculture and Life Sciences
lu.contributor.unitDepartment of Agricultural Sciences
lu.identifier.orcid0000-0002-9194-4597
lu.identifier.orcid0000-0002-5691-4915
pubs.publication-statusPublished
pubs.publisher-urlhttps://www.grassland.org.nz/viewpublication.php?pubID=399
pubs.volume78
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