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α-Tocopherol in plasma and milk from organically managed dairy cows fed natural or synthetic vitamin E or seaweed

Steinshamn, Håvard; Luteberget, Ingvild Steinnes; Jensen, Søren K. and Thuen, Erling (2012) α-Tocopherol in plasma and milk from organically managed dairy cows fed natural or synthetic vitamin E or seaweed. In: Rahmann, Gerold and Godinho, Denise (Eds.) Tackling The Future Challenges of Organic Animal Husbandry, (German) Agriculture and Forestry Research, Braunschweig, Germany, Agriculture and Forestry Research, Special Issue No 362 , no. 362, pp. 450-453.

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Online at: http://www.vti.bund.de/en/startseite/vti-publications/landbauforschung-special-issues.html

Summary

The objective was to compare the effects of supplementing lactating dairy cows with synthetic (All-rac), natural (RRR) α-tocopheryl acetate or seaweed with a control on the concentration of α-tocopherol in blood and milk. Twenty four dairy cows in mid lactation, fed an organic feed ration, were randomly allocated to the four treatments in a replicated Latin square design. Plasma and milk α-tocopherol concentrations were higher in RRR and All-rac than in the other treatments and higher in RRR than in All-rac. RRR-α-tocopherol was the predominant steroisomer (> 86%), in both plasma and milk, whereas the remaining part was largely made up by the three synthetic 2R isomers. In cows fed the control, seaweed and RRR, the proportion of RRR-α-tocopherol in plasma and milk constituted more than 97% of the total α-tocopherol. The study demonstrated that dairy cows in mid and late lactation have preferential uptake of RRR-α-tocopherol compared to other stereoisomers


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:vitamins; feed; roughage; feed supplements; dairy cow; milk; NatVit
Subjects: Animal husbandry > Production systems > Dairy cattle
Animal husbandry > Feeding and growth
Animal husbandry > Health and welfare
Research affiliation: Denmark > AU - Aarhus University > AU, DJF - Faculty of Agricultural Sciences
Norway > UMB - Norwegian University of Life Sciences
Norway > Bioforsk - Norwegian Institute for Agriculture and Environmental Research > Bioforsk Organic Food and Farming Division
Norway > RCN - Research Council of Norway > Norsk mat fra sjø og land (MATPROGRAMMET)
ISSN:0376-0723
ISBN:978-3-86576-094-4
Deposited By: Steinshamn, Dr Håvard
ID Code:21667
Deposited On:09 Nov 2012 08:58
Last Modified:09 Nov 2012 09:33
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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