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Macromineral and trace element concentrations and their seasonal variation in milk from organic and conventional dairy herds

Qin, N., Faludi, G., Beauclercq, S., Pitt, J., Desnica, N., Petursdottir, A., Newton, E., Angelidis, A., Givens, I., Juniper, D., Humphries, D., Gunnlaugsdottir, H. and Stergiadis, S. ORCID: https://orcid.org/0000-0002-7293-182X (2021) Macromineral and trace element concentrations and their seasonal variation in milk from organic and conventional dairy herds. Food Chemistry, 359. 129865. ISSN 0308-8146

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To link to this item DOI: 10.1016/j.foodchem.2021.129865

Abstract/Summary

To study the effects of dairy production system on milk macromineral and trace element concentrations, milk samples were collected monthly in 2019 from 43 conventional and 27 organic farms. Organic milk contained more Ca (1049.5 vs. 995.8 mg/kg), K (1383.6 vs. 1362.4 mg/kg), P (806.5 vs. 792.5 mg/kg) and Mo (73.3 vs. 60.6 μg/kg) but less Cu (52.4 vs. 60.6 μg/kg), Fe (0.66 vs 2.03 mg/kg), Mn (28.8 vs. 45.0 μg/kg), Zn (4.51 vs. 5.00 mg/kg) and Al (0.32 vs. 1.14 μg/kg) than conventional milk. Significant seasonal variation was observed in all determined minerals’ concentrations. Milk I concentration was not consistently affected by production system, whereas organic milk contained less I in June and July than conventional milk. Dietary factors contributing to different milk mineral concentrations between production systems included intakes of maize silage, dry-straights and oils (higher in conventional diets), and pasture, clover and wholecrop (higher in organic diets).

Item Type:Article
Refereed:Yes
Divisions:Interdisciplinary Research Centres (IDRCs) > Institute for Food, Nutrition and Health (IFNH)
Interdisciplinary centres and themes > Centre for Dairy Research (CEDAR)
Life Sciences > School of Agriculture, Policy and Development > Food Production and Quality Division > Animal, Dairy and Food Chain Sciences (ADFCS)
ID Code:97205
Publisher:Elsevier

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