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[Blood sugar in dairy cows].

M Lebeda

    Veterinarni Medicina
    |January 1, 1983
    PubMed
    Summary

    Summer feed rations significantly lower glycemia (blood glucose levels) in cows and heifers compared to winter rations. Diet type, not reproductive phase, primarily impacts blood glucose, with hypoglycemia being more common.

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    Area of Science:

    • Animal Nutrition
    • Veterinary Medicine
    • Metabolic Studies

    Context:

    • Assesses glycemia in 1270 cows/heifers on summer rations and 1981 on winter rations.
    • Considers lactation phases and late pregnancy stages (III).
    • Evaluates nutrient levels and energy in feed rations.

    Purpose:

    • Investigate the influence of feed rations (summer vs. winter) and reproductive phase on glycemia.
    • Determine the primary factors affecting blood glucose levels in cattle.
    • Analyze the variability and distribution of glycemia.

    Summary:

    • Glycemia levels were significantly lower with summer rations than winter rations across all groups.
    • Feed ration type had a greater impact on glycemia than the reproductive cycle phase.
    • Hypoglycemic deviations were more prevalent than hyperglycemic ones, particularly in early lactation.

    Impact:

    • High glycemia variability (26.5-34.6%) limits its use as a sole indicator of energy balance.
    • Nutrient coverage was higher in summer, with narrow calorie-protein ratios prevalent.
    • Recommends evaluating glycemia within a broader metabolic and nutritional context, using multivariate statistics.

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