Effect of dietary seaweed (Ascophyllum nodosum) supplementation on milk mineral concentrations, transfer efficiency, and hematological parameters in lactating Holstein cows
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Author
Newton, E.E.
Theodoridou, K.
Huws, S.
Ray, P.
Reynolds, C.K.
Prat, N.
Sabrià, D.
Stergiadis, S.
Publication date
2023-05-18ISSN
0022-0302
Abstract
This study investigated the effect of feeding seaweed (Ascophyllum nodosum) to dairy cows on milk mineral concentrations, feed-to-milk mineral transfer efficiencies and hematological parameters. Lactating Holstein cows (n = 46) were allocated to one of 2 diets (n = 23 each): (i) control (CON; without seaweed), and (ii) seaweed (SWD; replacing 330 g/d of dried corn meal in CON with 330 g/d dried A. nodosum). All cows were fed the CON diet for 4 weeks before the experiment (adaptation period); and animals were then fed the experimental diets for 9 weeks. Samples included sequential 3-week composite feed samples, a composite milk sample on the last day of each week, and a blood sample at the end of the study. Data were statistically analyzed using a linear mixed effects model with diet, week, and their interaction as fixed factors; cow (nested within diet) as a random factor and data collected on the last day of the adaptation period as covariates. Feeding SWD increased milk concentrations of Mg (+6.6 mg/kg), P (+56 mg/kg), and I (+1720 μg/kg). It also reduced transfer efficiency of Ca, Mg, P, K, Mn, and Zn, and increased transfer efficiency of Mo. Feeding SWD marginally reduced milk protein concentrations while there was no effect of SWD feeding on cows' hematological parameters. Feeding A. nodosum increased milk I concentrations, which can be beneficial when feed I concentration is limited or in demographics or populations with increased risk of I deficiency (e.g., female adolescents, pregnant women, nursing mothers). However, care should also be taken when feeding SWD to dairy cows because, in the present study, milk I concentrations were particularly high and could result in I intakes that pose a health risk for children consuming milk.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
636 - Animal husbandry and breeding in general. Livestock rearing. Breeding of domestic animals
Pages
14
Publisher
Elsevier
Is part of
Journal of Dairy Science
Citation
Newton, E.E., K. Theodoridou, M. Terré, S. Huws, P. Ray, C.K. Reynolds, N. Prat, D. Sabrià, and S. Stergiadis. 2023. "Effect Of Dietary Seaweed (Ascophyllum Nodosum) Supplementation On Milk Mineral Concentrations, Transfer Efficiency, And Hematological Parameters In Lactating Holstein Cows". Journal Of Dairy Science 106 (10): 6880-6893. doi:10.3168/jds.2022-23074.
Grant agreement number
EC/H2020/730924/EU/An integrated infrastructure for increased research capability and innovation in the European cattle sector/SmartCow
Program
Producció de Remugants
This item appears in the following Collection(s)
- ARTICLES CIENTÍFICS [2567]
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Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/