Bioprospecting essential oils of exotic species as potential mitigations of ruminant enteric methanogenesis

Nunes, Helder; Dias, Cristiana S. A. M. Maduro; Borba, Alfredo Emílio Silveira de

doi:10.1016/j.heliyon.2022.e12786

Cited by 10 publications

(11 citation statements)

References 33 publications

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“…where 𝑦 represents the gas production at time 𝑡 (in hours); 𝑎 and 𝑏 correspond to the gas production of the immediately soluble and insoluble fractions, respectively (mL 200 mg ˗1 DM); and 𝑐 is the insoluble fraction's gas production rate (mL h −1 ). The rumen fluid used in the digestibility and gas production determinations was collected from the local slaughterhouse as described by [19] and according to the conditions specified by [20]. The rumen for each experiment was collected from 5 healthy dairy cows.…”

Section: Non-destructive Method-nir Spectroscopymentioning

confidence: 99%

Near-Infrared Spectroscopy Integration in the Regular Monitorization of Pasture Nutritional Properties and Gas Production

2023

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Nutrition has a very significant impact on animal performance. Given the limited agricultural area of the Azores, the optimization of forage quality, quantity, and availability is key for the local livestock industry’s ability to respond to the challenges of an increasingly globalized market. This work’s goal was to evaluate the use of near-infrared spectroscopy to determine several chemical and biological parameters of pastures under the agroclimatic conditions of the Azores, and to compare its predicative ability when applied to dry homogeneous samples and to fresh inhomogeneous samples, so that we can assess the feasibility of using it to predict new samples on-site in the future. Infrared spectra of 400 fresh and dried grass samples were collected and associated with the corresponding reference values, determined through conventional methods. Mathematical models were created that established relationships between these readings and the values of the properties of interest. Predictive capacity proved especially good for crude protein, neutral detergent fiber, acid detergent fiber, ash, and dry matter, but insufficient for the biological parameters included in the study related to gas production. Near-infrared spectroscopy proved to be useable on-site as a quick, non-destructive, and cost-effective technique to monitor forage quality on a regular basis, enabling forage management and diet design optimizations.

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Section: Non-destructive Method-nir Spectroscopymentioning

confidence: 99%

Near-Infrared Spectroscopy Integration in the Regular Monitorization of Pasture Nutritional Properties and Gas Production

2023

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“…To determine the total gas and methane production in ruminal fermentation, we utilised a gas fermentation system equipped with sealed bioreactors and agitation devices. We followed the protocol described by Nunes et al [ 25 ]. In vitro tests were conducted for each alga separately, with five distinct treatments: T0—Control (no algae addition); T1—1.25%; T2—2.5%; T3—5%; and T4—10%, measuring the total gas and methane volume.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Two Species of Macroalgae from Azores Sea as Potential Reducers of Ruminal Methane Production: In Vitro Ruminal Assay

Nunes,

Maduro Dias,

Álvaro

et al. 2024

Animals

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The utilisation of seaweeds as feed supplements has been investigated for their potential to mitigate enteric methane emissions from ruminants. Enteric methane emissions are the primary source of direct greenhouse gas emissions in livestock and significantly contribute to anthropogenic methane emissions worldwide. The aim of the present study is to evaluate the nutritional role and the in vitro effect on cumulative gas and methane production of Asparagopsis taxiformis (native species) and Asparagopsis armata (invasive species), two species of red algae from the Azorean Sea, as well as the ability to reduce biogas production when incubated with single pasture (Lolium perenne and Trifollium repens) as substrate. Four levels of concentrations marine algae were used (1.25%, 2.25%, 5%, and 10% DM) and added to the substrate to evaluate ruminal fermentation using the in vitro gas production technique. The total amount of gas and methane produced by the treatment incubation was recorded during 72 h of incubation. The results indicate that both algae species under investigation contain relatively high levels of protein (22.69% and 24.23%, respectively, for Asparagopsis taxiformis and Asparagopsis armata) and significant amounts of minerals, namely magnesium (1.15% DM), sodium (8.6% DM), and iron (2851 ppm). Concerning in vitro ruminal fermentation, it was observed that A. taxiformis can reduce enteric methane production by approximately 86%, during the first 24 h when 5% is added. In the same period and at the same concentration, A. armata reduced methane production by 34%. Thus, it can be concluded that Asparagopsis species from the Azorean Sea have high potential as a protein and mineral supplement, in addition to enabling a reduction in methane production from rumen fermentation.

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“…The rumen fluid for each experiment (digestibility and gas production) was collected as described by Borba et al [ 19 ] in the local slaughterhouse, where the following conditions were observed: for each experiment, rumen was collected from 5 healthy dairy cattle, the animals had been fed ryegrass ( Lolium multiflorum ) and silage-based corn. Rumen fluid was collected within 10 min of slaughter, filtered of cheesecloth, and preserved at 39 °C under anaerobic conditions, being delivered to the animal nutrition laboratory within 30 min after being collected [ 20 ].…”

Section: Methodsmentioning

confidence: 99%

Influence of the Season on the Nutritive Value and Gas Production of Opuntia ficus-indica and Agave americana L. in Ruminant Feed

Dias

Nunes

Vouzela

et al. 2023

Animals

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Using invasive plants in animal production can provide an economical and eco-sustainable competitive advantage in a globalized market. The Opuntia ficus-indica and the Agave americana L. are invasive plants historically used by Azorean farmers as an alternative ruminant water source in the summer. This study aims to better understand their properties and how they vary throughout the year, so their use to complement animal diets can be optimised. Six samples of each species were collected on the Terceira Island during 2 growth seasons: winter (January 2021) and summer (September 2021), and their chemical composition, in vitro digestibility, and gas production, were determined. Significant (p < 0.05) differences were found in all parameters between the summer and the winter, with larger variations in both fibre (NDF and ADF) and digestibility parameters found between the Opuntia and the Agave. Gas production was greater in the summer for Opuntia and in the winter for Agave. Even though the digestibility was lower in the summer, we found that both plants offer a viable ruminant feed complement in both seasons, providing a cheap and eco-sustainable alternative water source, that can be associated to dry forage and compound feeding stuff with a high crude protein content when designing ruminant diets.

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Bioprospecting essential oils of exotic species as potential mitigations of ruminant enteric methanogenesis

Cited by 10 publications

References 33 publications

Near-Infrared Spectroscopy Integration in the Regular Monitorization of Pasture Nutritional Properties and Gas Production

Near-Infrared Spectroscopy Integration in the Regular Monitorization of Pasture Nutritional Properties and Gas Production

Evaluation of Two Species of Macroalgae from Azores Sea as Potential Reducers of Ruminal Methane Production: In Vitro Ruminal Assay

Influence of the Season on the Nutritive Value and Gas Production of Opuntia ficus-indica and Agave americana L. in Ruminant Feed

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