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Ruminal Synthesis, Biohydrogenation, and Digestibility of Fatty Acids by Dairy Cows
Open accessAbstract
Ruminal synthesis and biohydrogenation of fatty acids in dairy cows were determined by sampling duodenal digesta through T-cannulas. Fatty acid digestibility in the total tract also was measured. Five diets (concentrate:alfalfa hay:alfalfa haylage:corn silage, 2:1:1:1, DM) in a 5 x 5 Latin square contained either no added fat; 3 or 6% added calcium soap; or 3 or 6% animal-vegetable blend fat. Seventy percent of dietary fatty acids were recovered at the duodenum, and 106 g/d were synthesized in the rumen regardless of diets. Fatty acids synthesized in greatest amounts were odd or branched chains, whereas more than 90% of the fatty acids shorter than 14 carbons disappeared. Fatty acids in calcium soap were biohydrogenated 57% and in animal-vegetable blend 87%. Fatty acids in calcium soap were more digestible (80.0 vs. 75.7%) than those in the blended fat due to greater unsaturation in the small intestine. Ruminal microorganisms selectively synthesized fatty acids.
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Citations
Cited by
Effects of Diet on Short-Term Regulation of Feed Intake by Lactating Dairy Cattle
Allen, M. S. (2000) · Journal of Dairy Science · doi:10.3168/jds.s0022-0302(00)75030-2 · Cited by 1,550
Digestion and utilisation of fatty acids by ruminants
Doreau, M., & Ferlay, A. (1994) · Animal Feed Science and Technology · doi:10.1016/0377-8401(94)90039-6 · Cited by 391
Harfoot, C. G., & Hazlewood, G. P. (1997) · The Rumen Microbial Ecosystem · doi:10.1007/978-94-009-1453-7_9 · Cited by 322
Jalč, D., Lauková, A., Váradyová, Z., Homolka, P., & Koukolová, V. (2009) · Animal Feed Science and Technology · doi:10.1016/j.anifeedsci.2008.11.004 · Cited by 34
Richard, O. K., Codron, D., Hagen, K. B., Südekum, K. ‐., & Clauss, M. (2017) · Journal of Animal Physiology and Animal Nutrition · doi:10.1111/jpn.12657 · Cited by 10
Metadata
- Authors
- Wu, Z., Ohajuruka, O. A., & Palmquist, D. L.
- Venue
- Journal of Dairy Science
- Publisher
- American Dairy Science Association
- Published
- 1991-09
- Volume
- 74
- Issue
- 9
- Pages
- 3025-3034
- ISSN
- 0022-0302 (ISSN-L)
- OpenAlex
- W2128101088
- Cited by
- 298
- References
- 0
- FWCI
- 23.50
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Wu, Z., Ohajuruka, O. A., & Palmquist, D. L. (1991). Ruminal Synthesis, Biohydrogenation, and Digestibility of Fatty Acids by Dairy Cows. Journal of Dairy Science. https://doi.org/10.3168/jds.s0022-0302(91)78488-9
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