The effects of out-wintering replacement dairy heifers on deferred grazing, kale or fodder beet without or with a trace mineral bolus on pre-calving performance in commercial spring calving herds

N.E. Atkins*, E.C.L. Bleach, PR Hargreaves, L.A. Sinclair

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Forage choice or trace mineral supplementation are not the main factors impacting performance of outwintered heifers.
Most replacement dairy heifers out-wintered in the UK are from low input spring calving systems, with the common forages being grass, kale and fodder beet (Atkins et al, 2014). Farmers using such systems generally consider performance of heifers to be adequate, reporting mean liveweight (Lwt) gain of 0.56 kg/d – enough to reach 90% of mature Lwt by first calving (Atkins et al, 2014). Previous research has reported reduced performance of dairy cows out-wintered on grass (Keogh et al, 2009) and trace mineral nutrition may affect performance, particularly when grazing kale, a brassica low in copper and containing anti-nutritional factors (Barry, 2013). The objective of the study was to compare the
performance and metabolism of heifers out-wintered on the three most common forages in commercial spring calving farms and the effect of trace mineral supplementation
Original languageEnglish
Title of host publicationProceedings of the British Society of Animal Science in association with AVTRW, CFER and EBLEX
PublisherCambridge University Press
Pages186
Number of pages1
Volume6
Edition2
Publication statusPrint publication - 1 Apr 2015

Publication series

NameAdvances in Animal Biosciences
PublisherCambridge University Press
ISSN (Print)2040-4700

Keywords

  • out-wintering, dairy cattle, pre-calving, bolus, minerals

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    Atkins, N. E., Bleach, E. C. L., Hargreaves, PR., & Sinclair, L. A. (2015). The effects of out-wintering replacement dairy heifers on deferred grazing, kale or fodder beet without or with a trace mineral bolus on pre-calving performance in commercial spring calving herds. In Proceedings of the British Society of Animal Science in association with AVTRW, CFER and EBLEX (2 ed., Vol. 6, pp. 186). (Advances in Animal Biosciences). Cambridge University Press.