More dairy heifers are achieving liveweight targets

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dc.contributor.author Handcock, RC en
dc.contributor.author Lopdell, Thomas en
dc.contributor.author McNaughton, LR en
dc.coverage.spatial Adelaide en
dc.date.accessioned 2016-09-19T21:38:31Z en
dc.date.issued 2016 en
dc.identifier.citation New Zealand Society of Animal Production 2016, Adelaide, 04 Jul 2016 - 07 Jul 2016. Proceedings of the New Zealand Society of Animal Production 2016. 76: 3-7. 2016 en
dc.identifier.issn 0370-2731 en
dc.identifier.uri http://hdl.handle.net/2292/30406 en
dc.description.abstract Dairy heifers should reach industry liveweight targets that are set to ensure heifers achieve good reproductive performance and milk production. The aim of this study was to determine if more dairy heifers born between the 2011-12 and 2014-15 dairy seasons (current) in New Zealand are achieving liveweight targets since a study on heifers born between the 2006-07 and 2010-11 dairy seasons (historic). In all age groups the mean live weight of current heifers was heavier than that of historic heifers. There were also a greater percentage of the current heifers at or above their target live weight compared with the historic heifers (P<0.001), suggesting that the rearing of dairy heifers has improved. The greatest improvement was seen at 15 months of age (mating) when 25% of historic heifers were at or above target compared with 56% of current heifers. Despite the improvement, 44% of current heifers were below target at mating and 65% were below target pre-calving (22 months of age). At 22 months of age, current heifers were on average nearly 42 kg below target live weight. By failing to achieve targets near calving, farmers are not capturing potential milk production benefits. en
dc.description.uri http://www.nzsap.org/system/files/proceedings/%2326%20Rhiannon%20Handcock.pdf en
dc.relation.ispartof New Zealand Society of Animal Production 2016 en
dc.relation.ispartofseries Proceedings of the New Zealand Society of Animal Production 2016 en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.title More dairy heifers are achieving liveweight targets en
dc.type Conference Item en
pubs.begin-page 3 en
pubs.volume 76 en
dc.description.version VoR - Version of Record en
dc.rights.holder Copyright: The author en
pubs.author-url http://www.nzsap.org/proceedings/more-dairy-heifers-are-achieving-liveweight-targets en
pubs.end-page 7 en
pubs.finish-date 2016-07-07 en
pubs.start-date 2016-07-04 en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Proceedings en
pubs.elements-id 538757 en
pubs.record-created-at-source-date 2016-08-10 en


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