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Background <p>Methane emissions from enteric fermentation in ruminant livestock make up 27% of anthropogenic methane emissions.</p> Results <p>Screening &gt; 1,700 lactic acid bacteria identified <i>Lacticaseibacillus rhamnosus</i> FNZ118 (Kowbucha™ FNZ118) and <i>L. rhamnosus</i> FNZ142, (Kowbucha™ FNZ142) as capable of inhibiting rumen methanogens and methane production in vitro. FNZ118 or FNZ142 fed daily to Friesian heifer calves from birth to 14&#xa0;weeks substantially lowered methane production through the first year of life compared to control animals. These strains also decreased feed intake and reduced ruminal metabolite concentrations without affecting animal live weight, suggesting an improvement in feed conversion efficiency. The observed effects did not cause major changes in the structure of the rumen microbiome.</p> Conclusions <p>These findings demonstrate that early life provision of specific <i>L. rhamnosus</i> strains lower CH<sub>4</sub> production and have potential for the mitigation of enteric greenhouse gas emissions from growing dairy cattle.</p>

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Early life treatment with Lacticaseibacillus rhamnosus strains drives reduced enteric methane emissions in dairy heifers

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月7日

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  • Laureen Crouzet,
  • William Kelly,
  • Catherine Andrews,
  • Priya Soni,
  • Brian Tong,
  • Rebecca Tavendale,
  • Krsana Rajasekaran,
  • Kathy Wieliczko,
  • Kay Pilkington,
  • Rachel Kaminsky,
  • Fiona Matiya,
  • German Molano,
  • Edgar Sandoval,
  • Brenna Dobson-Hill,
  • Peter Reid,
  • Stefan Muetzel,
  • Ajmal Khan,
  • Paul Maclean,
  • Hamish Doohan,
  • Tracey Burgess-Smith,
  • Norton Atkins,
  • Shalome Bassett,
  • James Dekker,
  • Jeremy Hill,
  • Emma Bermingham,
  • Graeme Attwood

摘要

Background

Methane emissions from enteric fermentation in ruminant livestock make up 27% of anthropogenic methane emissions.

Results

Screening > 1,700 lactic acid bacteria identified Lacticaseibacillus rhamnosus FNZ118 (Kowbucha™ FNZ118) and L. rhamnosus FNZ142, (Kowbucha™ FNZ142) as capable of inhibiting rumen methanogens and methane production in vitro. FNZ118 or FNZ142 fed daily to Friesian heifer calves from birth to 14 weeks substantially lowered methane production through the first year of life compared to control animals. These strains also decreased feed intake and reduced ruminal metabolite concentrations without affecting animal live weight, suggesting an improvement in feed conversion efficiency. The observed effects did not cause major changes in the structure of the rumen microbiome.

Conclusions

These findings demonstrate that early life provision of specific L. rhamnosus strains lower CH4 production and have potential for the mitigation of enteric greenhouse gas emissions from growing dairy cattle.