What question did this study set out to answer?

This trial aimed to investigate the relationship between residual methane production and various productivity metrics in beef heifers.

May 9, 2026Journal of Animal Science

Effect of Residual Methane Production on Growth, Feed Intake, Feed Efficiency, Body Composition, and Gas Exchange in Growing Beef Heifers

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This trial aimed to investigate the relationship between residual methane production and various productivity metrics in beef heifers.
97 growing beef heifers were assigned to two blocks for an 84-day feed efficiency test.
Individual feed intake and body weight were recorded, along with methane and gas exchange measurements using indirect calorimetry.
Data were analyzed with a mixed model considering RMP classification and block as fixed effects.
Low RMP heifers emitted 27.8% less methane (g/d; P < 0.001) and 32.3% less methane yield (g/kg DMI; P < 0.001).
No differences in growth parameters, including initial and final body weight, ADG, or feed efficiency were observed (P > 0.399).
DMI was positively associated with ADG (r = 0.55; P < 0.001) and methane production (r = 0.66; P < 0.001).

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Implication

Randomized trial evaluates growth and gas emissions in beef heifers with differing methane production profiles, suggesting potential for lower emissions without performance loss.

Cite This Study

Simeone et al. (2026) studied this question.

synapsesocial.com/papers/69fecfcdb9154b0b82876bc0 https://doi.org/10.1093/jas/skag107.039

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Implication

Randomized trial evaluates growth and gas emissions in beef heifers with differing methane production profiles, suggesting potential for lower emissions without performance loss.

Effect of Residual Methane Production on Growth, Feed Intake, Feed Efficiency, Body Composition, and Gas Exchange in Growing Beef Heifers

Key Points

Discussion

Implication

Cite This Study

Effect of Residual Methane Production on Growth, Feed Intake, Feed Efficiency, Body Composition, and Gas Exchange in Growing Beef Heifers

Key Points

Discussion

Implication

Cite This Study

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