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Fatty acid content, vitamins and selenium in bulk tank milk from organic and conventional Swedish dairy herds during the indoor season

Published online by Cambridge University Press:  23 June 2011

Nils Fall*
Affiliation:
Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, SE-750 07 Uppsala, Sweden
Ulf Emanuelson
Affiliation:
Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, SE-750 07 Uppsala, Sweden
*
*For correspondence; e-mail: Nils.Fall@slu.se

Abstract

Fatty acids, vitamins and minerals in milk are important for the human consumer, the calf and the cow. Studies indicate that milk from organic and conventional dairy herds may differ in these aspects. The aim of this study was therefore to investigate whether there are differences in the fatty acid composition and concentration of vitamins and selenium in milk between organic and conventional herds in Sweden. Bulk tank milk was sampled in 18 organic and 19 conventional dairy herds on three occasions during the indoor season 2005–2006. Herd characteristics were collected by questionnaires and from the official milk recording scheme. Multivariable linear mixed models were used to evaluate the associations between milk composition and type of herd, while adjusting for potential confounders and the repeated observations within herd. In addition to management type, variables included in the initial models were housing type, milk fat content, herd size, average milk yield and time on pasture during summer. The median concentration of conjugated linoleic fatty acids (CLA) was 0·63% in organic compared with 0·48% in conventional herds, the content of total n-3 fatty acids was 1·44% and 1·04% in organic and conventional milk, respectively, and the content of total n-6 fatty acids was 2·72% and 2·20% in organic and conventional milk, respectively. The multivariable regression models indicated significantly higher concentrations of CLA, total n-3 and n-6 fatty acids in organic milk and a more desirable ratio of n-6 to n-3 fatty acids, for the human consumer, in organic milk. The multivariable models did not demonstrate any differences in retinol, α-tocopherol, β-carotene or selenium concentrations between systems. Median concentrations of α-tocopherol were 0·80 μg/ml in organic and 0·88 μg/ml in conventional milk, while for β-carotene the median concentrations were 0·19 and 0·18 μg/ml, respectively; for retinol, the median concentration was 0·32 μg/ml in both groups; the median concentrations of selenium were 13·0 and 13·5 μg/kg, respectively, for organic and conventional systems.

Type
Research Article
Copyright
Copyright © Proprietors of Journal of Dairy Research 2011

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References

Bergamo, P, Fedele, E, Iannibelli, L & Marzillo, G 2003 Fat-soluble vitamin contents and fatty acid composition in organic and conventional Italian dairy products. Food Chemistry 82 625631Google Scholar
Bloksma, J, Adriaansen-Tennekes, R, Huber, M, van der Vijver, LPL, Baars, T & de Wit, J 2008 Comparison of organic and conventional raw milk quality in the Netherlands. Biological Agriculture & Horticulture 26 6983Google Scholar
Butler, G, Nielsen, JH, Slots, T, Seal, C, Eyre, MD, Sanderson, R & Leifert, C 2008 Fatty acid and fat-soluble antioxidant concentrations in milk from high- and low-input conventional and organic systems: seasonal variation. Journal of the Science of Food and Agriculture 88 14311441Google Scholar
Charmley, E, Nicholson, JWG & Zee, JA 1993 Effect of supplemental vitamin E and selenium in the diet on vitamin E and selenium levels and control of oxidized flavor in milk from Holstein cows. Canadian Journal of Animal Science 73 453457Google Scholar
Chilliard, Y, Ferlay, A & Doreau, M 2001 Effect of different types of forages, animal fat or marine oils in cow's diet on milk fat secretion and composition, especially conjugated linoleic acid (CLA) and polyunsaturated fatty acids. Livestock Production Science 70 3148Google Scholar
Collomb, M, Bisig, W, Bütikofer, U, Sieber, R, Bregy, M & Etter, L 2008 Fatty acid composition of mountain milk from Switzerland: Comparison of organic and integrated farming systems. International Dairy Journal 18 976982Google Scholar
Collomb, M, Schmid, A, Sieber, R, Wechsler, D & Ryhänen, E-L 2006 Conjugated linoleic acids in milk fat: Variation and physiological effects. International Dairy Journal 16 13471361Google Scholar
EEC 2007 Council Regulation (EC) No 834/2007 of 28 June 2007 on organic production and labelling of organic products and repealing Regulation (EEC) No 2092/91. LuxembourgGoogle Scholar
Ekologiska Lantbrukarna 2008 Växande Marknad 2008: Försäljning, volymer, & trender för ekologisk mat. StockholmGoogle Scholar
Ellis, KA, Innocent, G, Grove-White, D, Cripps, P, McLean, WG, Howard, CV & Mihm, M 2006 Comparing the fatty acid composition of organic and conventional milk. Journal of Dairy Science 89 19381950Google Scholar
Ellis, KA, Innocent, G, Grove-White, D, Cripps, P, McLean, WG, Howard, CV & Mihm, M 2007 Investigation of the vitamins A and E and beta-carotene content in milk from UK organic and conventional dairy farms. Journal of Dairy Research 74 484491Google Scholar
Fall, N, Grohn, YT, Forslund, K, Essen-Gustafsson, B, Niskanen, R & Emanuelson, U 2008 An observational study on early-lactation metabolic profiles in Swedish organically and conventionally managed dairy cows. Journal of Dairy Science 91 39833992Google Scholar
Galgan, V & Frank, A 1988 Automated system for determination of selenium in biological materials In: Trace Element Analytical Chemistry in Medicine and Biology (Eds Brätter, P & Schramel, P). Berlin & New York: Walter de Gruyter & Co.Google Scholar
Galgan, V & Frank, A 1993 Notes and comments on the determination of selenium in biological materials. Norwegian journal of Agricultural Science, Supplement, 11 5774Google Scholar
Haug, A, Hostmark, AT & Harstad, OM 2007 Bovine milk in human nutrition—a review. Lipids in Health and Disease 6 2540Google Scholar
IFOAM 2010 The Principles of Organic Agriculture [Online]. Available: http://www.ifoam.org/about_ifoam/principles/index.html [Accessed 2010-08-12]Google Scholar
Jahreis, G, Fritsche, J & Steinhart, H 1997 Conjugated linoleic acid in milk fat: High variation depending on production system. Nutrition Research 17 14791484Google Scholar
Jensen, SK 1994 Retinol determination in milk by HPLC and fluorescence detection. Journal of Dairy Research 61 233240Google Scholar
Jensen, SK & Nielsen, KN 1996 Tocopherols, retinol, β-carotene and fatty acids in fat globule membrane and fat globule core in cows’ milk. Journal of Dairy Research 63 565574Google Scholar
Lavrenčič, A, Levart, A & Salobir, J 2007 Fatty acid composition of milk produced in organic and conventional dairy herds in Italy and Slovenia. Italian journal of Animal Science 6 437439Google Scholar
Nicholson, JWG & St-Laurent, AM 1991 Effect of forage type and supplemental dietary vitamin E on milk oxidative stability. Canadian Journal of Animal Science 71 11811186Google Scholar
Nielsen, JH, Lund-Nielsen, T & Skibsted, L 2004 Date accessed: 2010-06-09 Higher antioxidant content in organic milk than in conventional milk due to feeding strategy. Available from: http://www.darcof.dk/enews/sep04/milk.htmlGoogle Scholar
Noziere, P, Grolier, P, Durand, D, Ferlay, A, Pradel, P & Martin, B 2006 Variations in carotenoids, fat-soluble micronutrients, and color in cows’ plasma and milk following changes in forage and feeding level. Journal of Dairy Science 89 26342648Google Scholar
Palmquist, DL, Beaulieu, AD & Barbano, DM 1993 Feed and animal factors influencing milk fat composition. Journal of Dairy Science 76 17531771Google Scholar
Rist, L, Mueller, A, Barthel, C, Snijders, B, Jansen, M, Simões-Wüst, AP, Huber, M, Kummeling, I, Von Mandach, U, Steinhart, H & Thijs, C 2007 Influence of organic diet on the amount of conjugated linoleic acids in breast milk of lactating women in the Netherlands. British Journal of Nutrition 97 735743Google Scholar
SAS Institute 2004 SAS Institute. version 9.1.3 Ed.: SAS Institute Inc., Cary NC, USAGoogle Scholar
Schrauzer, GN & Surai, PF 2009 Selenium in human and animal nutrition: Resolved and unresolved issues. A partly historical treatise in commemoration of the fiftieth anniversary of the discovery of the biological essentiality of selenium, dedicated to the memory of Klaus Schwarz (1914–1978) on the occasion of the thirtieth anniversary of his death. Critical Reviews in Biotechnology 29 29Google Scholar
Simopoulos, AP 2002 The importance of the ratio of omega-6/omega-3 essential fatty acids. Biomedecine and Pharmacotherapy 56 365379Google Scholar
Simopoulos, AP 2008 The importance of the omega-6/omega-3 fatty acid ratio in cardiovascular disease and other chronic diseases. Experimental Biology and Medicine 233 674688Google Scholar
Slots, T, Butler, G, Leifert, C, Kristensen, T, Skibsted, LH & Nielsen, JH 2009 Potentials to differentiate milk composition by different feeding strategies. Journal of Dairy Science 92 20572066Google Scholar
Toledo, P & Andrén, A 2003 Content of beta-carotene in organic milk. Journal of Food, Agriculture and Environment 1 122125Google Scholar
Toledo, P, Andrén, A & Björck, L 2002 Composition of raw milk from sustainable production systems. International Dairy Journal 12 7580Google Scholar
Voorrips, LE, Brants, HA, Kardinaal, AF, Hiddink, GJ, van den Brandt, PA & Goldbohm, RA 2002 Intake of conjugated linoleic acid, fat, and other fatty acids in relation to postmenopausal breast cancer: the Netherlands cohort study on diet and cancer. American Journal of Clinical Nutrition 76 873882Google Scholar