Effects of flaxseed encapsulation on biohydrogenation of polyunsaturated fatty acids by ruminal microorganisms: feedlot performance, carcass quality, and tissue fatty acid composition

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dc.contributor.author Alvarado-Gilis, C. A.
dc.contributor.author Aperce, C. C.
dc.contributor.author Miller, K. A.
dc.contributor.author Van Bibber-Krueger, C. L.
dc.contributor.author Klamfoth, D.
dc.contributor.author Drouillard, James S.
dc.date.accessioned 2016-03-28T19:16:07Z
dc.date.available 2016-03-28T19:16:07Z
dc.identifier.uri http://hdl.handle.net/2097/32190
dc.description Citation: Alvarado-Gilis, C. A., Aperce, C. C., Miller, K. A., Van Bibber-Krueger, C. L., Klamfoth, D., & Drouillard, J. S. (2015). Effects of flaxseed encapsulation on biohydrogenation of polyunsaturated fatty acids by ruminal microorganisms: feedlot performance, carcass quality, and tissue fatty acid composition. Journal of Animal Science, 93(9), 4368-4376. doi:10.2527/jas2015-9171
dc.description The objective of this study was to evaluate the efficacy of protecting PUFA within ground flaxseed against ruminal biohydrogenation by encapsulating them in a matrix consisting of a 1:1 blend of ground flaxseed and dolomitic lime hydrate (L-Flaxseed). Crossbreed heifers (n = 462, 346 +/- 19 kg) were blocked by weight and randomly assigned to pens. Pens were assigned to 1 of 6 dietary treatments in a randomized complete block design. Treatment 1 consisted of a combination of 54.6% steam-flaked corn (SFC), 30.0% wet corn gluten feed, 8.0% roughage, and supplement (0% flaxseed). In treatments 2 and 3, a proportion of SFC was replaced with 3 and 6% flaxseed, respectively; in treatments 4, 5, and 6, SFC was replaced with 2, 4, or 6% L-Flaxseed, respectively. Cattle were fed for 140 or 168 d and then harvested in a commercial abattoir where carcass data were collected. Approximately 24 h after harvest, carcasses were evaluated for 12th-rib fat thickness, KPH, LM area, marbling score, and USDA yield and quality grades. Samples of LM were also obtained for determination of long-chain fatty acid profiles. Cattle that were fed diets with 4 and 6% L-Flaxseed consumed less feed than other treatments (P < 0.05), which adversely affected ADG. Compared with cattle fed 0% flaxseed, cattle in these treatments had lower final BW (18 and 45 kg less for the 4 and 6% L-Flaxseed treatments, respectively), less ADG (0.16 and 0.48 kg/day less for the 4 and 6% L-Flaxseed treatments, respectively), and lower carcass weights, dressing percentages, LM areas, backfat thicknesses, and marbling scores (P < 0.05). The addition of flaxseed or 2% L-Flaxseed did not affect performance or carcass traits (P > 0.05). Supplementation with flaxseed increased (P < 0.05) the concentration of a-linolenic acid (ALA) in meat (0.173, 0.482, 0.743 mg/g for 0, 3, and 6% flaxseed, respectively). Furthermore, proportionate increases in the ALA content of muscle tissue were 47% greater when flaxseed was encapsulated within the dolomitic lime hydrate matrix (0.288, 0.433, 0.592 mg/g for 2, 4, and 6% L-Flaxseed, respectively). Both products showed a linear response in ALA concentration (R-2 > 99%; increases for Flaxseed and L-Flaxseed of 0.095 and 0.140 mg of ALA/g of tissue for each percentage of flaxseed added). This study indicates that a matrix consisting of dolomitic lime hydrate is an effective barrier to ruminal biohydrogenation of PUFA; however, adverse effects on DMI limit the amounts that can be fed.
dc.relation.uri https://doi.org/10.2527/jas.2015-9171
dc.rights Copyright © 2015. American Society of Animal Science. 
dc.rights.uri http://www.sherpa.ac.uk/romeo/issn/0021-8812/
dc.subject Encapsulation
dc.subject Matrix
dc.subject Omega-3 Fatty Acids
dc.subject Alpha-Linolenic Acid
dc.subject Sodium-Bicarbonate
dc.subject Magnesium-Oxide
dc.title Effects of flaxseed encapsulation on biohydrogenation of polyunsaturated fatty acids by ruminal microorganisms: feedlot performance, carcass quality, and tissue fatty acid composition
dc.type Article
dc.date.published 2015
dc.citation.doi 10.2527/jas2015-9171
dc.citation.epage 4376
dc.citation.issn 0021-8812
dc.citation.issue 9
dc.citation.jtitle Journal of Animal Science
dc.citation.spage 4368
dc.citation.volume 93
dc.contributor.authoreid jdrouill


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