Reproductive performance of F1 crossbred dairy cows used for draught: Effect of work and diet supplementation

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dc.creatorZerbini, E.
dc.creatorGemeda, T.
dc.creatorFranceschini, R.
dc.creatorSherington, J.
dc.creatorGebre-Wold, A.
dc.date1993
dc.date2013-05-06T07:00:16Z
dc.date2013-05-06T07:00:16Z
dc.date.accessioned2026-06-27T16:32:04Z
dc.descriptionForty pregnant crossbred cows (20 Holstein-Friesian X Boran and 20 Simmental X Boran) were assigned to a 2x2 (work X diet) factorial experiment as follows: supplemented-non-working (SNW), supplemented-working (SW), non-supplemented-non-working (NSNW) and non-supplemented-working (NSW). Working cows pulled sledges 100 days/year. Conception and oestrous at fixed times were analysed using linear logistic models. Proportional hazard models were used for analysing `failure' time data such as time to first oestrous or time to conception. Diet supplementation significantly decreased days to first oestrus and days to conception in non-working and working cows. SW cows had similar reproductive performance to NSNW cows. In supplemented cows, work significantly delayed days to conception. However, by 365 days postpartum, conception rate was similar for SNW and SW cows. Body condition at calving significantly affected post-partum reproductive ability of crossbred cows. Work output of supplemented cows may be associated with longer calving intervals. The economic trade-offs between longer calving intervals and work output should be examined in detail.
dc.identifierhttps://hdl.handle.net/10568/28262
dc.identifier.urihttp://hdl.handle.net/123456789/125683
dc.languageen
dc.rightsLimited Access
dc.sourceAnimal Production;57(pt.2): 295-303
dc.subjectdairy cows
dc.subjectdraught animals
dc.subjectcrossbreds
dc.subjectreproductive performance
dc.subjectsupplementary feeding
dc.subjectoestrous cycle
dc.subjectzebu cattle
dc.subjecthumpless cattle
dc.titleReproductive performance of F1 crossbred dairy cows used for draught: Effect of work and diet supplementation
dc.typeJournal Article

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