September 1, 2024Journal of Animal Science

PSVIII-19 Assessing methane and carbon dioxide production in beef cows across diverse foraging conditions

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ABA. BehrouziUniversity of Alberta HBHailey BolenUniversity of Alberta FNFrancisco NovaisUniversity of Alberta

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Implication

Observational study reveals drylot rankings partially reflect methane production across grazing conditions, indicating feeding behavior alters pasture emissions.

Key Points

Methane yield rankings established in drylot conditions differed during grazing, where medium-ranked cows produced the highest daily emissions.
Medium-yield cows emitted 260.5 g/d of methane compared to 234.8 g/d in high-yield and 235.0 g/d in low-yield groups across pasture conditions.
Assessment using the GreenFeed Emissions Monitoring System tracked 30 pregnant beef cows across a drylot phase and three grazing seasons.
Rankings may help track low- and medium-emission groups, but grazing-induced changes in dry matter intake alter emissions in high-ranked cows.

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Behrouzi et al. (2024) studied this question.

synapsesocial.com/papers/68e59fa4b6db643587539e32 https://doi.org/10.1093/jas/skae234.674

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Implication

Observational study reveals drylot rankings partially reflect methane production across grazing conditions, indicating feeding behavior alters pasture emissions.

PSVIII-19 Assessing methane and carbon dioxide production in beef cows across diverse foraging conditions

Discussion

Member takes

Implication

Key Points

Cite This Study

PSVIII-19 Assessing methane and carbon dioxide production in beef cows across diverse foraging conditions

Discussion

Member takes

Implication

Key Points

Cite This Study

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