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dc.contributor.authorBoulton, ACen_US
dc.contributor.authorRushton, Jen_US
dc.contributor.authorWathes, DCen_US
dc.date.available2015-07-09en_US
dc.date.issued2015-07-09en_US
dc.identifierhttp://www.scirp.org/journal/ojas/en_US
dc.identifier.citationOpen Journal of Animal Sciences, 2015, 5 (3), pp. 294 - 308 (14)en_US
dc.identifier.issn2161-7597en_US
dc.description.abstractDairy heifers only start to produce a return on investment at first calving. The length of the nonproductive rearing period is largely governed by farmer decisions on plane of nutrition and reproduction management. Primary data were collected from 101 dairy farms and a cost analysis workbook developed to calculate individual inputs in each of three periods to determine which management decisions and farm factors have the greatest influence on the total costs associated with rearing. This paper covers weaning until conception. Heifers were weaned at 62 d (range 42 - 112 d) and conceived by 509 d (range 365 - 700 d) giving an average weaning to conception period of 447 ± 60 d (range 253 to 630 d). The mean daily cost of rearing during this period was £1.65 (range £0.75 to £2.97 on different farms) giving a mean total cost of £745.94 per heifer (range £295.32 to £1745.85). This large variation was mostly due to the duration, which was mainly determined by age at first breeding (mean 476 days, range 365 - 700 d). The main contributors to total costs were feed (35.6%), labour (24.7%) and bedding (8.9%). The variables most strongly associated with the total costs were age at conception, calving pattern and breed. A multivariable model predicted an increase in mean cost of £2.26 for each extra day in age at conception. The total cost was highest in herds with all year round calving, intermediate in multi-block and lowest in spring and autumn calving herds, with Friesian x and Jersey herds having the lowest cost of rearing.en_US
dc.format.extent294 - 308 (14)en_US
dc.languageEnglishen_US
dc.publisherScientific Research Publishingen_US
dc.relation.urihttp://file.scirp.org/pdf/OJAS_2015070911064131.pdfen_US
dc.rightsCopyright © 2015 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY)
dc.rights.urihttp://www.scirp.org/journal/ojas/en_US
dc.subjectHeiferen_US
dc.subjectCost Analysisen_US
dc.subjectSexed Semenen_US
dc.titleThe Management and Associated Costs of Rearing Heifers on UK Dairy Farms from Weaning to Conceptionen_US
dc.typeJournal Article
dc.citation.volume5en_US
dc.identifier.doi10.4236/ojas.2015.53034en_US
dc.description.confidentialfalseen_US
dc.identifier.elements-id290995
dc.relation.isPartOfOpen Journal of Animal Sciencesen_US
dc.citation.issue3en_US
dc.description.publication-statusPublished onlineen_US
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/Institute of Vet, Animal & Biomed Science
dc.identifier.harvestedMassey_Dark
pubs.notesNot knownen_US


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