Enteric Methane Emissions from Dairy-Beef Steers Supplemented with the Essential Oil Blend Agolin Ruminant

Area of Science:

• Animal Science
• Environmental Science
• Agricultural Science

Background:

• Agriculture is a major global source of methane, with enteric fermentation in livestock contributing significantly.
• Dairy-beef production is an expanding sector within the beef industry, increasing its environmental impact.
• Enteric methane emissions from cattle represent a substantial portion of global agricultural greenhouse gas output.

Purpose of the Study:

• To evaluate the efficacy of Agolin Ruminant, an essential oil blend, in reducing enteric methane emissions from dairy-bred steers.
• To quantify the impact of essential oil supplementation on methane yield and production in beef cattle.
• To assess the effect of Agolin Ruminant on animal well-being and dry matter intake under experimental conditions.

Main Methods:

• Thirty-six Holstein Friesian steers were divided into control and treatment groups (18 animals each).
• Methane emissions were measured using open-circuit respiration chambers at three time points: pre-supplementation, 46 days, and 116 days post-supplementation.
• Dry matter intake was monitored to assess animal well-being and potential confounding factors.

Main Results:

• Supplementation with Agolin Ruminant resulted in a significant reduction in methane yield (g CH4/kg DMI) at both 46 and 116 days post-introduction (p < 0.05 and p < 0.01, respectively).
• No significant difference in total methane production (g/day) was observed between control and treated groups.
• Control animals showed a greater reduction in dry matter intake when isolated in respiration chambers compared to those receiving Agolin Ruminant, suggesting a potential stress-mitigating effect.

Conclusions:

• Agolin Ruminant supplementation effectively reduces enteric methane yield in dairy-bred steers without altering overall methane production.
• Essential oil supplementation may offer a viable strategy for mitigating greenhouse gas emissions in the beef industry.
• Agolin Ruminant may also positively influence animal well-being by reducing the negative impacts of environmental stressors on feed intake.