The essential oil blend Agolin Ruminant L reduces methane production in vitro and in vivo when included in the drinking water of cattle.

Autor:	Batley RJ; Institute for Future Farming Systems, CQUniversity, Rockhampton, QLD, Australia., Romanzini EP; Institute for Future Farming Systems, CQUniversity, Rockhampton, QLD, Australia.; DIT AgTech, Wilsonton, QLD, Australia., da Silva KD; Universidade Estadual de Londrina, Londrina, PR, Brazil., de Souza WL; Institute for Future Farming Systems, CQUniversity, Rockhampton, QLD, Australia.; Universidade Estadual Paulista 'Júlio de Mesquita Filho', Jaboticabal, SP, Brazil., Quigley SP; Institute for Future Farming Systems, CQUniversity, Rockhampton, QLD, Australia., Harper KJ; Institute for Future Farming Systems, CQUniversity, Rockhampton, QLD, Australia., Trotter MG; Institute for Future Farming Systems, CQUniversity, Rockhampton, QLD, Australia., Bernardes PA; Institute for Future Farming Systems, CQUniversity, Rockhampton, QLD, Australia., Naiker M; Institute for Future Farming Systems, CQUniversity, Rockhampton, QLD, Australia., Costa DAF; Institute for Future Farming Systems, CQUniversity, Rockhampton, QLD, Australia.
Jazyk:	angličtina
Zdroj:	Journal of animal science [J Anim Sci] 2024 Oct 15. Date of Electronic Publication: 2024 Oct 15.
DOI:	10.1093/jas/skae315
Abstrakt:	Two experiments were conducted to determine the potential for the essential oil blend Agolin Ruminant L (Agolin) to reduce enteric methane (CH4) emissions from beef cattle when delivered via the drinking water. Experiment 1 evaluated aqueous solutions of Agolin (50 mg/L) and a non-protein nitrogen and mineral solution (uPRO ORANGE [uPRO]; 1.7 mL/L) individually and in combination, where Agolin was added to concentrated uPRO at 3, 4.5, 6% Agolin (w/w) prior to dilution with water at 1.7 mL/L, for a total of five treatments. These were incubated for 48 h with a medium-quality Rhodes grass (Chloris gayana) hay substrate, with gas production, CH4 concentration in gas, and digestibility measured in vitro. In Exp. 2, Droughtmaster steers (n = 24) were fed a basal diet of Rhodes grass hay and were allocated to one of three water treatments (n = 8/treatment) supplemented with either uPRO (2.27 mL uPRO/L water), or one of two inclusion rates of Agolin in combination with uPRO (2.27 mL uPRO and 6 µL Agolin/L water or 2.27 mL uPRO and 24 µL Agolin/L water) with enteric CH4 emissions, feed and water intake, and live weight gain (LWG) measured over 56 d. In Exp. 1, the inclusion of Agolin in uPRO at 6% w/w resulted in a reduction in CH4 production (15.8%; P = 0.003) and the proportion of CH4 in the gas produced (24.5%; P < 0.001). In Exp. 2, steers consuming the lower quantity of Agolin via drinking water had a 16.4% (P = 0.0027) reduction in CH4 production over the experiment, declining from 140 g/d during week 1 to 117 g/d in week 8. This inclusion rate of Agolin in the drinking water also resulted in a 25 g (17.6%) CH4/d decrease in emissions by steers compared to control steers (P = 0.0205). However, no significant differences in CH4 yield (g CH4/kg dry matter intake), or CH4 intensity (g CH4/kg LWG) by steers was observed between treatments. These results demonstrate that Agolin reduces CH4 emissions when mixed in aqueous solution under in vitro and in vivo conditions, providing a potential method to reduce enteric CH4 emissions from cattle in extensive production systems. (© The Author(s) 2024. Published by Oxford University Press on behalf of the American Society of Animal Science.)
Databáze:	MEDLINE
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