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Effect of camelina oil or live yeasts (Saccharomyces cerevisiae) on ruminal methane production, rumen fermentation, and milk fatty acid composition in lactating cows fed grass silage diets
Open accessAbstract
The potential of dietary supplements of 2 live yeast strains (Saccharomyces cerevisiae) or camelina oil to lower ruminal methane (CH4) and carbon dioxide (CO2) production and the associated effects on animal performance, rumen fermentation, rumen microbial populations, nutrient metabolism, and milk fatty acid (FA) composition of cows fed grass silage-based diets were examined. Four Finnish Ayrshire cows (53±7 d in milk) fitted with rumen cannula were used in a 4×4 Latin square with four 42-d periods. Cows received a basal total mixed ration (control treatment) with a 50:50 forage-to-concentrate ratio [on a dry matter (DM) basis] containing grass silage, the same basal total mixed ration supplemented with 1 of 2 live yeasts, A or B, administered directly in the rumen at 10(10) cfu/d (treatments A and B), or supplements of 60g of camelina oil/kg of diet DM that replaced concentrate ingredients in the basal total mixed ration (treatment CO). Relative to the control, treatments A and B had no effects on DM intake, rumen fermentation, ruminal gas production, or apparent total-tract nutrient digestibility. In contrast, treatment CO lowered DM intake and ruminal CH4 and CO2 production, responses associated with numerical nonsignificant decreases in total-tract organic matter digestibility, but no alterations in rumen fermentation characteristics or changes in the total numbers of rumen bacteria, methanogens, protozoa, and fungi. Compared with the control, treatment CO decreased the yields of milk, milk fat, lactose, and protein. Relative to treatment B, treatment CO improved nitrogen utilization due to a lower crude protein intake. Treatment A had no influence on milk FA composition, whereas treatment B increased cis-9 10:1 and decreased 11-cyclohexyl 11:0 and 24:0 concentrations. Treatment CO decreased milk fat 8:0 to 16:0 and total saturated FA, and increased 18:0, 18:1, 18:2, conjugated linoleic acid, 18:3n-3, and trans FA concentrations. Decreases in ruminal CH4 production to treatment CO were related, at least in part to lowered DM intake, whereas treatments had no effect on ruminal CH4 emission intensity (g/kg of digestible organic matter intake or milk yield). Results indicated that live yeasts A and B had no influence on animal performance, ruminal gas production, rumen fermentation, or nutrient utilization in cows fed grass silage-based diets. Dietary supplements of camelina oil decreased ruminal CH4 and CO2 production, but also lowered the yields of milk and milk constituents due to an adverse effect on intake.
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“Variable effects of vegetable oils and unsaturated FA on CH4 emission might be associated with the double bond number per FA, type of oil (free oil or whole seed), and composition (roughage-to-concentrate ratio) of the rations (134).”
From Phytogenic Additives Can Modulate Rumen Microbiome to Mediate Fermentation Kinetics and Methanogenesis Through Exploiting Diet–Microbe Interaction (2020) · cites this paper as [134]
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Items 101–118 of 118
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“…aforementioned benefits of dietary supplementation of S. cerevisiae have been documented, the responses to such supplementation in rumen microbiota (Bayat et al., 2015) and fermentation parameters (Dias et al., 2018; Barrera et al., 2019; Sun et al., 2021) are inconsistent, potentially due to…”
BackgroundResultPerformance, methane production, and beef lipid profile of young bulls finished in feedlot
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“Supplementation with brewer’s spent grain and yeast has also been shown to improve milk production and milk composition, including increases in protein, fat, and total solids, as well as milk production efficiency (Bayat et al., 2015; Yadessa et al., 2024).”
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“A previous study showed that adding 0.5 g of live yeast to the diet of Ayrshire dairy cows had no effect on the milk production of https://doi.org/10.3390/ani16193049 dairy cows and had no effect on the proportion of major fatty acids in milk [34].”
InfluentialEconomic and Environmental Gains from the Use of Yeast By-Products in the Feeding of Dairy CowsPreprint
Silva, J. T., de Oliveira, E. R., Gimenes, R. M. T., Souza, S. V., de Oliveira, J. D., Peixoto, E. L. T., Monção, F. P., Muniz, E. B., Andrade, W. D. P., Cardoso, C. A. L., et al. (2026) · Research Square · doi:10.21203/rs.3.rs-10683622/v1
Metadata
- Authors
- Bayat, A. R., Kairenius, P., Stefański, T., Leskinen, H., Comtet-Marre, S., Forano, E., Chaucheyras-Durand, F., & Shingfield, K. J.
- Affiliations
- Natural Resources Institute Finland (FI)
- Institut National de la Recherche Agronomique (FR)
- Corresponding author
- Bayat, A.R.
- Venue
- Journal of Dairy Science
- Publisher
- American Dairy Science Association
- Published
- 2015-05
- Volume
- 98
- Issue
- 5
- Pages
- 3166-3181
- ISSN
- 0022-0302 (ISSN-L)
- OpenAlex
- W2164605450
- Cited by
- 118
- References
- 59
- Citations by year
- 2026: 8 · 2025: 13 · 2024: 16 · 2023: 7 · 2022: 15 · 2021: 12 · 2020: 9 · 2019: 6 · 2018: 10 · 2017: 10 · 2016: 9 · 2015: 3
- FWCI
- 23.13
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Journal of Dairy Science (publishedVersion)
- PubMed (publishedVersion)
- HAL (submittedVersion)
- Jukuri (Natural Resources Institute Finland (Luke)) (submittedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Ruminant Nutrition and Digestive Physiology
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Anaerobic Digestion and Biogas Production
- Keywords
- methane, camelina oil, Saccharomyces cerevisiae, live yeast supplementation, grass silage, lactating dairy cows, milk fatty acid composition, rumen fermentation, rumen methanogens, dietary supplementation, milk fat, conjugated linoleic acid, trans fatty acids, nitrogen utilization, dry matter intake, rumen protozoa, rumen fungi
- MeSH terms
- Animals, Carbon Dioxide, Cattle, Diet, Digestion, Fatty Acids, Female, Fermentation, Poaceae, Lactation, Lactose, Methane, Milk, Plant Oils, Rumen, Saccharomyces cerevisiae, Silage, Dietary Supplements, Brassicaceae
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