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Related Experiment Videos

Magnesium toxicity: effect on phosporus utilization by broiler chicks

S Lee, W M Britton

    Poultry Science
    |September 1, 1980
    PubMed
    Summary

    High dietary magnesium (Mg) in broiler chicks caused adverse effects, including reduced weight and increased mortality. Supplementing with phosphorus (P) or chloride (Cl) helped mitigate these negative impacts, highlighting Mg

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    Area of Science:

    • Animal Nutrition
    • Avian Physiology
    • Poultry Science

    Background:

    • Dietary mineral balance is crucial for poultry health and performance.
    • Magnesium (Mg) is an essential mineral, but excessive intake can lead to toxicity.
    • Understanding the interactions between magnesium, phosphorus (P), and chloride (Cl) is vital for broiler nutrition.

    Purpose of the Study:

    • To investigate the effects of excessive dietary magnesium on broiler chick growth, mortality, and leg health.
    • To determine the efficacy of supplemental phosphorus (P) and chloride (Cl) in ameliorating magnesium toxicity.
    • To clarify the relationship between dietary magnesium and phosphorus requirements in poultry.

    Main Methods:

    • Broiler chicks were fed a corn-soy basal diet supplemented with varying levels of magnesium (.3%, .5%, .9%).
    • Different levels of dietary phosphorus (P) and chloride (Cl) were administered to assess their mitigating effects.
    • Key parameters monitored included 28-day body weight, mortality rates, incidence of leg abnormalities, and plasma magnesium levels.

    Main Results:

    • Excessive dietary magnesium resulted in cathartic effects, decreased 28-day body weight, increased mortality, and leg abnormalities.
    • Increased dietary phosphorus significantly counteracted magnesium toxicity, except at the highest magnesium inclusion level (.9%).
    • Supplemental chloride improved body weights and reduced hypermagnesemia in magnesium-intoxicated chicks.

    Conclusions:

    • Excessive dietary magnesium poses significant health risks to broiler chicks.
    • Dietary phosphorus and chloride play crucial roles in mitigating magnesium toxicity.
    • Accurate monitoring of dietary magnesium is essential for determining precise phosphorus requirements in poultry diets.

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