Understanding the influence of sward type and dairy cow breed on enteric methane emissions through investigation of the rumen microbiome
C. Dwan, F. Buckley, A. Das, P. W. O’Toole, T. F. O’Callaghan, D. Meehan, B. Horan, H. Costigan, A. Jezequel, B. Lahart · 2026
Read Understanding the influence of sward type and dairy cow breed on enteric methane emissions through investigation of the rumen microbiome by C. Dwan, F. Buckley, A. Das, P. W. O’Toole, T. F. O’Callaghan, D. Meehan, B. Horan, H. Costigan, A. Jezequel, B. Lahart (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/PMC13322137.txt.
Description
C. Dwan and colleagues study how pasture type and cow breed shape rumen germs tied to methane in a 2026 trial. Dairy cows grazed three sward systems: plain ryegrass with high nitrogen, ryegrass with white clover at half nitrogen, and a mixed species sward. Holstein-Friesian cows and Jersey crossbreds were compared, with rumen fluid sampled in August and October.
Sward type did not shift overall germ diversity, though several bacterial groups grew more common on clover and mixed swards. Total methane making archaea did not differ by sward, but their mix did, with Methanosphaera up and Methanobrevibacter down on diverse swards. Breed effects were minor. Diverse pasture alone looks unlikely to cut methane sharply.
Catalog record
| CREATOR | C. Dwan, F. Buckley, A. Das, P. W. O’Toole, T. F. O’Callaghan, D. Meehan, B. Horan, H. Costigan, A. Jezequel, B. Lahart |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 35595 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |