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dc.contributor.authorMcKenzie, Bruce A.en
dc.contributor.authorGyamtsho, P.en
dc.contributor.authorLucas, Richard J.en
dc.date.accessioned2012-07-17T23:33:49Z
dc.date.issued1990en
dc.identifier.citationMcKenzie, B. A., Gyamtsho, P. & Lucas, R. J. (1990). Productivity and water use of lucerne and two lucerne-grass mixtures in Canterbury. Proceedings of the New Zealand Grassland Association, 52, 35-39.en
dc.identifier.urihttps://hdl.handle.net/10182/4693
dc.description.abstractThe long term trial, on a Templeton fine sandy loam, is a factorial combination of 3 pasture swards (pure WL320 lucerne, lucerne-‘Grasslands Matua’ prairie grass and lucerne-‘Grasslands Maru’ phalaris) and 2 grazing durations (long and short). The 0.04ha plots were sown in November 1986 with lucerne drilled across the grass rows. For the water use study, in 1988-89, 8 m² mini plots of pure lucerne, lucerne-phalaris, and lucerne-prairie in deep or shallow soil were selected. Pure lucerne plots produced annual dry matter (DM) yields of 12700 kg/ha, lucerne-phalaris 11600 and lucerne-prairie 10400. Deep soils had higher production (12600 kg/ha) than did shallow soils (10900 kg/ha). The lucerne-phalaris mixture had about 75-95% lucerne, while lucerne in the lucerne-prairie mixture ranged from 25% in winter to 65% in summer. The lucerne-prairie plots with deep soils had at least 60% lucerne while shallow soils had as little as 25%. Mean water use efficiency (WUE) was 25, 22 and 20 kg DM/ha/mm for pure lucerne, lucerne-phalaris and lucetne-prairie, respectively. Shallow soils had WUE of 21 kg DM/ha/mm H₂O and deep soils 24 kg DM/ha/mm. Soil water extraction ‘patterns differed little in shallow soils, but in deep soils pure lucerne extracted water to at least 100 cm while lucerne-phalaris and lucerne-prairie extracted soil moisture down to about 80 cm. Lucerne and phalaris roots were both found down to 90 cm and from O-20 cm most of the root mass was lucerne. With the lucerne-prairie mixture from O-20 cm, root mass was about 50% for each species and lucerne root mass was significantly reduced below 50 cm.en
dc.format.extent35-39en
dc.language.isoenen
dc.publisherNew Zealand Grassland Association.en
dc.relationThe original publication is available from - New Zealand Grassland Association.en
dc.rightsCopyright © The Authors and New Zealand Grassland Association.en
dc.sourceNew Zealand Grassland Association Conferenceen
dc.subjectMedicago sativaen
dc.subjectlucerne grass mixturesen
dc.subjectBromus willdenowiien
dc.subjectPhalaris aquaticaen
dc.subjectlucerneen
dc.subjectalfalfaen
dc.subjectprairie grassen
dc.subjectwater useen
dc.subjectyielden
dc.subjectrootsen
dc.titleProductivity and water use of lucerne and two lucerne-grass mixtures in Canterburyen
dc.typeConference Contribution - Published
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Agricultural Sciencesen
lu.contributor.uniten
lu.contributor.uniten
lu.contributor.unitVice Chancellor's Officeen
pubs.notesPaper presented at the 52nd conference of the New Zealand Grassland Association, 30 October - 1 November 1990, Ashburton.en
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/Research Management Office
pubs.organisational-group/LU/Research Management Office/2018 PBRF Staff group
pubs.organisational-group/LU/Vice Chancellor's Office
pubs.publication-statusPublisheden
lu.subtypeConference Paperen


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