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dc.contributor.authorMoot, Derrick J.en
dc.contributor.authorBrown, H.en
dc.contributor.authorPollock, Keith M.en
dc.contributor.authorMills, Annamariaen
dc.date.accessioned2012-05-21T04:53:24Z
dc.date.issued2008en
dc.identifier.citationMoot, D.J., Brown, H.E., Pollock, K. & Mills, A. (2008). Yield and water use of temperate pastures in summer dry environments. Proceedings of the New Zealand Grassland Association, 70, 51-57.en
dc.identifier.urihttps://hdl.handle.net/10182/4475
dc.description.abstractThe water use efficiencies (WUE) of a range of temperate pasture species were calculated from measurements on several different dryland and irrigated pastures in Canterbury. The annual WUE ranged from 6.7 kg DM/ ha/mm for a dryland cocksfoot pasture to 40 kg DM/ha/ mm for a dryland lucerne crop grown on a Wakanui silt loam soil. The lucerne crop extracted 328 mm of water to at least 2.3 m depth. Its deep root enabled high recovery of rainfall stored in the soil profile. By comparison a perennial ryegrass pasture only extracted 243 mm of water to 1.5 m depth on the same soil type and it had an annual WUE of 18 kg DM/ha/mm. Where practical, species with deep roots should be sown on deep free draining soils to extract all available soil water. On a stony Lismore soil, perennial ryegrass extracted 129 mm of water to a depth of 1.5 m. On a more stony, shallower soil, at the same location, lucerne extracted 131 mm to a depth of 2.3 m. Both pastures had similar annual DM yields and an annual WUE of 16 kg DM/ha/mm. Within the year WUE of the ryegrass pasture ranged from 3 to 22 kg DM/ha/mm. This seasonal variability reflected how soil moisture deficit, soil evaporation and drainage affected pasture growth. During spring, when moisture was non-limiting, clover monocultures and binary mixtures had higher WUEs than pure grass swards due to higher herbage nitrogen (N). Furthermore, a cocksfoot monoculture had an annual WUE of 38 kg DM/ha/mm when fertilised with N but it was only 17 kg DM/ha/mm when unfertilised. These results suggest WUE can be maximised annually and seasonally by growing monocultures of legumes, such as lucerne, adopting grazing management to enhance clover production or strategic application of N fertiliser to maximize growth when soil moisture is available.en
dc.description.sponsorshipFinancial assistance for PhD scholarships was provided for H.E. Brown by FoRST Bright Futures and for A. Mills by Meat & Wool NZ, AGMARDT, the Cocksfoot Growers Association and Sinclair Cummings Trust.en
dc.format.extent51-57en
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.sourceProceedings of the New Zealand Grassland Associationen
dc.subjectwater use efficiencyen
dc.subjecttemperate pasture speciesen
dc.subjectCichorium intybusen
dc.subjectDactylis glomerataen
dc.subjectT. subterraneumen
dc.subjectLolium perenneen
dc.subjectMedicago sativaen
dc.subjectTrifolium ambiguumen
dc.subjectT. michelianumen
dc.subjectT. pratenseen
dc.subjectT. repensen
dc.titleYield and water use of temperate pastures in summer dry environmentsen
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
pubs.finish-date2008-10-16en
pubs.notesPaper presented at the 70th New Zealand Grassland Association Conference, 14-16 October 2008, Blenheim.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.publication-statusPublisheden
pubs.start-date2008-10-14en
pubs.volume70en
lu.subtypeConference Paperen


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