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Related Experiment Videos

[The selenium content of milk].

E Norrman

    Nordisk Veterinaermedicin
    |September 1, 1984
    PubMed
    Summary

    Milk selenium levels in Swedish dairy cows vary seasonally and regionally. Selenium fortification of feed increased milk selenium, but levels remain lower than two decades ago, potentially risking cattle deficiency.

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    Area of Science:

    • Agricultural Science
    • Animal Nutrition
    • Environmental Chemistry

    Context:

    • Milk selenium content varies globally due to feed composition.
    • Natural selenium compounds are better utilized by cows than selenite.
    • Swedish dairy cow milk showed significant seasonal and regional selenium variations.

    Purpose:

    • To investigate the factors affecting selenium content in dairy cow milk.
    • To assess the impact of selenium fortification on milk selenium levels in Sweden.
    • To evaluate the risk of selenium deficiency in Swedish cattle.

    Summary:

    • Milk selenium concentrations in Swedish dairy cows were significantly lower in summer and autumn compared to winter and spring.
    • Following the introduction of sodium selenite fortification in cattle feed, milk selenium levels increased.
    • Despite fortification, current milk selenium levels in Sweden are lower than historical data, suggesting a potential risk of selenium deficiency in cattle.

    Impact:

    • Highlights the importance of feed management for optimizing milk selenium content.
    • Suggests that current selenium fortification levels may not fully address potential deficiencies in Swedish cattle.
    • Informs strategies to ensure adequate selenium intake for dairy herds and milk-fed calves.

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