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dc.contributor.authorGifford, W. L.
dc.date.accessioned2020-04-19T22:09:03Z
dc.date.available2020-04-19T22:09:03Z
dc.date.issued1994
dc.identifier.urihttps://hdl.handle.net/10182/11737
dc.description.abstractSix alternative reproduction management policies were compared by running a herd reproduction and lactation simulation model. The various different policies were compared to a base data set and each other to assess their success, in terms of total herd production and various measures of reproductive efficiency. The management systems trialled investigated the impact of no induction, the timing of induction, synchronisation of heifers and high culling/replacement rates, under three levels of management. The results showed a high replacement rate to be the best treatment option, producing milk yields of 2.8, 2.6, and 6.4 kgMS/cow/lactation above the control treatment, at each of good, average and poor management levels, respectively. It was also the only treatment to require no inductions, as the concentrated calving spread was maintained by restricting the breeding period. Mid period induction produced the most favourable result of the induction policies, while late induction served no useful purpose. Further studies into the financial implications of the various policies trialled would be useful in drawing any strong conclusions as to the most appropriate method for minimising the negative effects of induction and maximising milk production.en
dc.format.extentix, 86 pages
dc.language.isoenen
dc.publisherLincoln Universityen
dc.rights.urihttps://researcharchive.lincoln.ac.nz/page/rights
dc.subjectmilk productionen
dc.subjectdairy farmingen
dc.subjectlactation simulation modelen
dc.subjectmilk yielden
dc.subjectreproduction management policiesen
dc.titleAlternative management policies to the induction of parturition in dairy cows: A dissertation submitted in partial fulfilment of the requirements for the degree of Bachelor of Agricultural Science (Honours)en
dc.typeDissertationen
thesis.degree.grantorLincoln Universityen
thesis.degree.levelOtheren
thesis.degree.nameBachelor of Agricultural Science (Honours)en
lu.thesis.supervisorBywater, A. C.
lu.contributor.unitDepartment of Agricultural Sciencesen
dc.rights.accessRightsDigital thesis can be viewed by current staff and students of Lincoln University only.en
dc.subject.anzsrc0702 Animal Productionen
dc.subject.anzsrc070206 Animal Reproductionen


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