Intake of milk and pasture and growth rate of calves reared by cows with high or low potential for milk production

dc.contributor.authorRoca Fraga FJ
dc.contributor.authorLopez-Villalobos N
dc.contributor.authorMartin NP
dc.contributor.authorKenyon PR
dc.contributor.authorMorris ST
dc.contributor.authorHickson RE
dc.description.abstractMilk production of cows influences calf weaning weight, which is the major driver for economic return in a cow–calf operation. The growth trajectory of 64 steer calves resulting from a terminal cross between Angus or Simmental bulls with Angus, Angus cross Holstein Friesian, Angus cross Jersey and Angus cross KiwiCross cows was examined during the pre-weaning period from birth (D0) to weaning (D148) and during the post-weaning period until a year of age (D365). Random regression models were used to model milk intake and liveweight of calves throughout lactation. These models were a good fit to the data (r2 = 0.77 for milk intake and r2 = 0.99 for liveweight). Total energy intake from milk was greater (P < 0.05) for the Angus cross Holstein Friesian-, Angus cross Jersey- and Angus cross KiwiCross-reared steers than for those reared by Angus dams. Additional milk intake increased liveweight of steers from D90 to D365, but the magnitude of the effect decreased as the calves aged. Simmental-sired steers had a greater liveweight response to additional milk intake than Angus-sired steers at D120 and D148, probably reflecting greater growth potential from out-crossed calves.
dc.format.extent? - ? (7)
dc.identifier.citationAnimal Production Science, 2016, pp. ? - ? (7)
dc.publisherCSIRO Publishing
dc.relation.isPartOfAnimal Production Science
dc.subject.anzsrc05 Environmental Sciences
dc.subject.anzsrc06 Biological Sciences
dc.subject.anzsrc07 Agricultural and Veterinary Sciences
dc.titleIntake of milk and pasture and growth rate of calves reared by cows with high or low potential for milk production
dc.typeJournal article
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/School of Agriculture & Environment