Skip to main content Accessibility help
×
Home

Effect of organic zinc and selenium on dairy cow productivity and fertility

  • A. I. Macrae (a1), L. Hodgson-Jones (a2), K. Aitchison (a2), S Burton (a2), D. Lawson (a3) and D. Wilde (a4)...

Extract

Major changes have been occurring over the last 20 years in the UK dairy industry, with improvements in cow genetics and nutritional management resulting in a doubling of average milk yields to 6,750 litres/cow/year by 2004 (DEFRA, 2005). The same period has resulted in a decline of dairy cow fertility parameters with recent studies having identified a 1% fall in conception rates per annum (Royal et al., 2000). The role of organic forms of trace minerals has been examined in ruminant diets with particular regard to their role in immune function (Spears, 2000). The aim of the study was to examine the effect of feeding an organic source of zinc (Bioplex Zinc™, Alltech Inc. USA) and selenium yeast (Sel-Plex™, Alltech Inc. USA) to high yielding Holstein dairy cows on production and reproductive performance.

Copyright

Corresponding author

References

Hide All
DEFRA 2005. Economics and statistics. http://statistics.defra.gov.uk/esg/
Royal, M.D., Darwash, A.O., Flint, A.P.F., Webb, R., Woolliams, A.J. and Lamming, G.E. 2000. Declining fertility in dairy cattle: changes in traditional and endocrine parameters of fertility. Animal Science. 70: 487–501
Spears, J.W. 2000. Micronutrients and immune function in cattle. Proceedings of the Nutrition Society. 59: 587–594

Effect of organic zinc and selenium on dairy cow productivity and fertility

  • A. I. Macrae (a1), L. Hodgson-Jones (a2), K. Aitchison (a2), S Burton (a2), D. Lawson (a3) and D. Wilde (a4)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed