Asparagopsis taxiformis supplementation to mitigate enteric methane emissions in dairy cows - effects on performance and metabolism.

作者：M. Angellotti, M. Lindberg, M. Ramin, S. Krizsan, R. Danielsson · 发表于：Journal of Dairy Science · 年份：2025 · DOI：10.3168/jds.2024-25258 · 被引用次数：25 · 研究领域：Medicine

Methane emissions from ruminant digestion contribute significantly to global anthropogenic greenhouse gas emissions. Members of the phylum Rhodophyta (red algae), particularly Asparagopsis sp., have shown promising results in reducing methane emissions in ruminants, due to their high content of halogenated methane analog compounds. However, knowledge is lacking regarding the effects of red algae on animal performance and metabolism. This study investigated the effects of dairy cow diet supplementation with Asparagopsis taxiformis on enteric methane performance, metabolism of bromine and iodine, and health status of the cows. Thirty lactating Nordic Red dairy cows fed a total mixed ration, were blocked according to parity and days in milk, and randomly assigned to one of 3 diets: a control diet with no Asparagopsis taxiformis (CON), a diet with 0.15% Asparagopsis taxiformis on an organic matter (OM) basis (L-AT), and a diet with 0.3% Asparagopsis taxiformis on an OM basis (H-AT). The cows were fed the experimental diets continuously for 13 weeks, beginning with a baseline week (wk 0), which served as covariate by week where all cows received the basal diet. Individual feed intake and milk yield were recorded automatically throughout the experiment. Milk composition was determined by collecting milk samples during each milking session on 2 consecutive days every experimental week. While enteric methane and hydrogen levels were measured continuously by the GreenFeed system. Fece...