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Diet and caecal motility in sheep.

J Fioramonti, Y Ruckebusch

    Annales De Recherches Veterinaires. Annals of Veterinary Research
    |January 1, 1979
    PubMed
    Summary

    Diet composition significantly impacts caecal contractions in ewes. Urea-containing feeds reduce caecal activity, while hay promotes it, influencing digestive function.

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    Area of Science:

    • Animal Science
    • Digestive Physiology
    • Ruminant Nutrition

    Background:

    • The caecum plays a crucial role in ruminant digestion.
    • Dietary components can modulate gastrointestinal motility.
    • Understanding factors affecting caecal activity is vital for optimizing ruminant health.

    Purpose of the Study:

    • To investigate the effect of different diets on caecal electrical activity in ewes.
    • To determine the influence of urea and food intake levels on caecal contractions.

    Main Methods:

    • Recording caecal electrical activity in 5 ewes over two months.
    • Administering diets including hay ad libitum, concentrates with urea, and concentrates without urea.
    • Varying food intake levels and meal frequency.

    Main Results:

    • Caecal contraction frequency decreased with concentrates containing urea compared to hay.
    • Reduced food intake on hay or concentrate diets (without urea) also lowered caecal contraction frequency.
    • Daily meals induced caecal hyperactivity with hay but inhibition with urea-containing concentrates.
    • Postprandial hyperactivity originated in the rumen and was vagus nerve-mediated.
    • Urea's inhibitory effects correlated with ruminal ammonia production and diffusion.

    Conclusions:

    • Dietary composition, particularly the presence of urea, significantly alters caecal motility in ewes.
    • Rumen function and ammonia production are key factors influencing these dietary effects on the caecum.
    • Vagal mediation plays a role in the observed postprandial responses.

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