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Article

Effect of Dietary Seaweed Supplementation in Cows on Milk Macrominerals, Trace Elements and Heavy Metal Concentrations

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Department of Animal Sciences, School of Agriculture Policy and Development, University of Reading, Earley Gate, P.O. Box 237, Reading RG6 6EU, UK
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Matís Ltd., Vínlandsleid 12, 113 Reykjavik, Iceland
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BSSL, Agricultural Society of South Iceland, Austurvegur 1, 800 Selfoss, Iceland
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ECPM—Ecole Europeenne de Chimie, Polymeres et Materiaux, Université de Strasbourg, 25 Rue Becquerel, 67087 Strasbourg, France
*
Authors to whom correspondence should be addressed.
Academic Editors: Eleni Tsiplakou and Panagiotis Simitzis
Foods 2021, 10(7), 1526; https://doi.org/10.3390/foods10071526
Received: 26 May 2021 / Revised: 18 June 2021 / Accepted: 24 June 2021 / Published: 2 July 2021
This study investigated the effect of seaweed supplementation in dairy cow diets on milk yield, basic composition, and mineral concentrations. Thirty-seven Icelandic cows were split into three diet treatments: control (CON, no seaweed), low seaweed (LSW, 0.75% concentrate dry matter (DM), 13–40 g/cow/day), and high seaweed (HSW, 1.5% concentrate DM, 26–158 g/cow/day). Cows were fed the same basal diet of grass silage and concentrate for a week, and then were introduced to the assigned experimental diets for 6 weeks. The seaweed mix of 91% Ascophyllum nodosum: 9% Laminaria digitata (DM basis), feed, and milk samples were collected weekly. Data were analyzed using a linear mixed effects model, with diet, week, and their interaction as fixed factors, cow ID as random factor, and the pre-treatment week data as a covariate. When compared with CON milk, LSW and HSW milk had, respectively, less Se (−1.4 and −3.1 μg/kg milk) and more I (+744 and +1649 μg/kg milk), while HSW milk also had less Cu (−11.6 μg/kg milk) and more As (+0.17 μg/kg milk) than CON milk. The minimal changes or concentrations in milk for Se, Cu, and As cannot be associated with any effects on consumer nutrition, but care should be taken when I-rich seaweed is fed to cows to avoid excessive animal I supply and milk I concentrations. View Full-Text
Keywords: milk; iodine; minerals; seaweed; Laminaria digitata; Ascophyllum nodosum; Icelandic cow milk; iodine; minerals; seaweed; Laminaria digitata; Ascophyllum nodosum; Icelandic cow
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MDPI and ACS Style

Newton, E.E.; Pétursdóttir, Á.H.; Ríkharðsson, G.; Beaumal, C.; Desnica, N.; Giannakopoulou, K.; Juniper, D.; Ray, P.; Stergiadis, S. Effect of Dietary Seaweed Supplementation in Cows on Milk Macrominerals, Trace Elements and Heavy Metal Concentrations. Foods 2021, 10, 1526. https://doi.org/10.3390/foods10071526

AMA Style

Newton EE, Pétursdóttir ÁH, Ríkharðsson G, Beaumal C, Desnica N, Giannakopoulou K, Juniper D, Ray P, Stergiadis S. Effect of Dietary Seaweed Supplementation in Cows on Milk Macrominerals, Trace Elements and Heavy Metal Concentrations. Foods. 2021; 10(7):1526. https://doi.org/10.3390/foods10071526

Chicago/Turabian Style

Newton, Eric E., Ásta H. Pétursdóttir, Gunnar Ríkharðsson, Corentin Beaumal, Natasa Desnica, Konstantina Giannakopoulou, Darren Juniper, Partha Ray, and Sokratis Stergiadis. 2021. "Effect of Dietary Seaweed Supplementation in Cows on Milk Macrominerals, Trace Elements and Heavy Metal Concentrations" Foods 10, no. 7: 1526. https://doi.org/10.3390/foods10071526

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