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标题：Effect of Dietary Seaweed Supplementation in Cows on Milk Macrominerals, Trace Elements and Heavy Metal Concentrations
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作者：Eric E. Newton ; Ásta H. Pétursdóttir ; Gunnar Ríkharðsson 等
期刊名称：Foods
电子版ISSN：2304-8158
出版年度：2021
卷号：10
期号：7
页码：1526
DOI：10.3390/foods10071526
出版社：MDPI Publishing
摘要：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.
关键词：milk; iodine; minerals; seaweed; Laminaria digitata ; Ascophyllum nodosum ; Icelandic cow milk ; iodine ; minerals ; seaweed ; Laminaria digitata ; Ascophyllum nodosum ; Icelandic cow