The reduction of methane production in the in vitro ruminal fermentation of different substrates is linked with the chemical composition of the essential oil

• Autores: García, Florencia; Colombatto, Darío; Brunetti, M. Alejandra; Martínez, M. José; Moreno, María Valeria; Scorcione Turcato, M. Carolina; Lucini, Enrique; Frossasco, Georgina Paola; Martínez Ferrer, Jorge
• Año de publicación: 2020
• Idioma: inglés
• Tipo de recurso: artículo
• Fuente: Animals; Vol.10, no.5; art.786; https://www.mdpi.com
• Materia: GREENHOUSE GASES; RUMEN FERMENTATION; PLANT SECONDARYMETABOLITES; BIOACTIVE COMPOUNDS
• Institución: Universidad de Buenos Aires. Facultad de Agronomía

Fil: García, Florencia. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Córdoba, Argentina.
Fil: Colombatto, Darío. Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina. - CONICET. Buenos Aires, Argentina.
Fil: Brunetti, M. Alejandra. Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Córdoba. Estación Experimental Agropecuaria Manfredi (EEA Manfredi). Córdoba, Argentina.
Fil: Martínez, M. José. Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Córdoba. Estación Experimental Agropecuaria Manfredi (EEA Manfredi). Córdoba, Argentina.
Fil: Moreno, María Valeria. Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Córdoba. Estación Experimental Agropecuaria Manfredi (EEA Manfredi). Córdoba, Argentina.
Fil: Scorcione Turcato, M. Carolina. CONICET. Buenos Aires, Argentina.
Fil: Lucini, Enrique. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Córdoba, Argentina.
Fil: Frossasco, Georgina Paola. Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Córdoba. Estación Experimental Agropecuaria Manfredi (EEA Manfredi). Córdoba, Argentina.
Fil: Martínez Ferrer, Jorge. Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Córdoba. Estación Experimental Agropecuaria Manfredi (EEA Manfredi). Córdoba, Argentina.
There is interest in identifying natural products capable of manipulating rumen microbial activity to develop new feed additives for ruminant nutrition as a strategy to reduce methane. Two trials were performed using the in vitro gas production technique to evaluate the interaction of substrate (n = 5) and additive (n = 6, increasing doses: 0, 0.3, 3, 30, and 300 L/L of essential oils-EO-of Lippia turbinata or Tagetes minuta, and monensin at 1.87 mg/L). The two EO utilized were selected because they differ markedly in their chemical composition, especially in the proportion of oxygenated compounds. For both EO, the interaction between the substrate and additive was significant for all variables; however, the interaction behaved differently for the two EO. Within each substrate, the response was dose-dependent, without effects at a low level of EO and a negative outcome at the highest dose. The intermediate dose (30 L/L) inhibited methane with a slight reduction on substrate digestibility, with L. turbinata being more effective than T. minuta. It is concluded that the effectiveness of the EO to reduce methane production depends on interactions between the substrate that is fermented and the additive dose that generates different characteristics within the incubation medium (e.g., pH); and thus, the chemical nature of the compounds of the EO modulates the magnitude of this response.
tbls., grafs.