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Related Experiment Videos

Methane excretion in the growing pig.

K Christensen, G Thorbek

    The British Journal of Nutrition
    |May 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Reducing feed levels significantly lowers methane excretion in pigs. Adding soybean oil to diets also decreases methane output, offering insights into sustainable livestock farming practices.

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    Area of Science:

    • Animal Science
    • Environmental Science
    • Agricultural Science

    Background:

    • Methane (CH4) is a potent greenhouse gas produced during enteric fermentation in livestock.
    • Understanding factors influencing methane excretion in pigs is crucial for developing mitigation strategies.

    Purpose of the Study:

    • To quantify total methane excretion in growing pigs under different feeding strategies.
    • To evaluate the impact of feed levels and dietary fat on methane production.

    Main Methods:

    • Two experiments were conducted with Danish Landrace pigs (n=36) from 20 to 120 kg live weight.
    • Methane excretion was measured using open-air-circulation chambers during 24-hour respiration trials.
    • Pigs were fed either a commercial diet at high (HFL) or low (LFL) levels, or a semi-purified diet with or without soybean oil.

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    Main Results:

    • Methane excretion increased with live weight, reaching up to 12 litres/day at 120 kg.
    • Low feed levels (LFL) reduced total methane excretion by 23% compared to high feed levels (HFL).
    • However, methane excretion per kg of dry matter intake was higher with LFL (3.1 L/kg DM) than HFL (2.5 L/kg DM).
    • Inclusion of soybean oil in the diet reduced methane excretion by 26%.

    Conclusions:

    • Feed level and dietary fat content significantly influence methane excretion in growing pigs.
    • While reducing feed levels decreases overall methane output, it may increase methane intensity relative to feed intake.
    • Dietary strategies, such as fat supplementation, can be effective in mitigating methane emissions from pig production.