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Red seaweed (Asparagopsis taxiformis) supplementation reduces enteric methane by over 80 per cent in beef steers

Title	Red seaweed (Asparagopsis taxiformis) supplementation reduces enteric methane by over 80 per cent in beef steers
Authors	Breanna M. Roque, Marielena Venegas, Robert D. Kinley, Rocky de Nys, Toni L. Duarte, Xiang Yang, Ermias Kebreab
Magazine	PLoS ONE
Date	03/17/2021
DOI	10.1371/journal.pone.0247820
Introduction	This study investigates the impact of Asparagopsis taxiformis, a red macroalgae, on methane emissions, growth performance, and meat quality in beef steers. Previous in vitro studies indicated that Asparagopsis species could reduce ruminant enteric methane production by up to 99%. Here, twenty-one Angus-Hereford beef steers were assigned to control (0%), low (0.25%), or high (0.5%) A. taxiformis inclusion rates based on organic matter intake, alongside varying total mixed rations (TMR). Over 147 days, the low and high treatments decreased enteric methane yield by 45% and 68%, respectively, with an 80% reduction observed in the high treatment with low forage TMR. Hydrogen yield significantly increased, while carbon dioxide yield showed a modest rise in the high treatment. Crucially, no adverse effects were observed on average daily gain, carcass quality, or consumer taste preferences. While dry matter intake decreased in supplemented groups, feed conversion efficiency improved. These findings confirm A. taxiformis as an effective feed additive for substantially lowering the carbon footprint of ruminant livestock and improving production efficiency.
Quote	Roque, B. M.; Venegas, M.; Kinley, R. D.; de Nys, R.; Duarte, T. L.; Yang, X.; Kebreab, E. Red seaweed (Asparagopsis taxiformis) supplementation reduces enteric methane emissions by over 80 per cent in beef steers. PLoS ONE 2021, 16, e0247820. https://doi
Element	Carbon (C) , Hydrogen (H) , Oxygen (O) , Iodine (I)
Industry	Agriculture

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