Apparent Recovery of Duodenal Odd- and Branched- Chain Fatty Acids in Milk of Dairy Cows

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Apparent Recovery of Duodenal Odd- and Branched- Chain Fatty Acids in Milk of Dairy Cows. / Dewhurst, R. J.; Moorby, J. M.; Vlaeminck, B.; Fievez, V.

In: Journal of Dairy Science, Vol. 90, No. 4, 04.2007, p. 1175-1780.

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Harvard

Dewhurst, RJ, Moorby, JM, Vlaeminck, B & Fievez, V 2007, 'Apparent Recovery of Duodenal Odd- and Branched- Chain Fatty Acids in Milk of Dairy Cows', Journal of Dairy Science, vol. 90, no. 4, pp. 1175-1780. https://doi.org/10.3168/jds.2006-715

APA

Dewhurst, R. J., Moorby, J. M., Vlaeminck, B., & Fievez, V. (2007). Apparent Recovery of Duodenal Odd- and Branched- Chain Fatty Acids in Milk of Dairy Cows. Journal of Dairy Science, 90(4), 1175-1780. https://doi.org/10.3168/jds.2006-715

Vancouver

Dewhurst RJ, Moorby JM, Vlaeminck B, Fievez V. Apparent Recovery of Duodenal Odd- and Branched- Chain Fatty Acids in Milk of Dairy Cows. Journal of Dairy Science. 2007 Apr;90(4):1175-1780. https://doi.org/10.3168/jds.2006-715

Author

Dewhurst, R. J. ; Moorby, J. M. ; Vlaeminck, B. ; Fievez, V. / Apparent Recovery of Duodenal Odd- and Branched- Chain Fatty Acids in Milk of Dairy Cows. In: Journal of Dairy Science. 2007 ; Vol. 90, No. 4. pp. 1175-1780.

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@article{d81a3217cea84c71a2582a131d85fd23,
title = "Apparent Recovery of Duodenal Odd- and Branched- Chain Fatty Acids in Milk of Dairy Cows",
abstract = "This study compared flows of odd- and branched-chain fatty acids (OBCFA) at the duodenum with corresponding yields in milk. Four mid-lactation Holstein-Friesian dairy cows were offered 4 dietary treatments, based on different ratios of ryegrass silage and concentrates (80:20, 65:35, 50:50, and 35:65 on a dry matter basis), in a 4 × 4 Latin square design experiment with 4-wk periods. Samples of milk and duodenal digesta were collected during the final week of each period and analyzed for fatty acids. Biohydrogenation of linoleic and α-linolenic acids (C18:2 and C18:3) was extensive for all treatments, with a tendency to be lower for C18:3 with increased concentrate feeding. The proportion of duodenal flows of these fatty acids that appeared in milk declined with increasing concentrate feeding. There was little change in the yield of OBCFA in milk in response to increasing level of concentrate inclusion and no significant relationship with the yield of microbial protein at the duodenum. The efficiency of transfer of iso C15:0 and anteiso C15:0 from the duodenum to milk was similar to that for C18:3, with a reduced proportion transferred into milk at higher flows. Yields of C15:0, C17:0, and iso C17:0 in milk were higher than duodenal flows, confirming synthesis in animal tissues",
keywords = "dairy cow, fatty acids, biohydrogenation, milk composition",
author = "Dewhurst, {R. J.} and Moorby, {J. M.} and B. Vlaeminck and V. Fievez",
year = "2007",
month = apr,
doi = "10.3168/jds.2006-715",
language = "English",
volume = "90",
pages = "1175--1780",
journal = "Journal of Dairy Science",
issn = "0022-0302",
publisher = "Elsevier",
number = "4",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Apparent Recovery of Duodenal Odd- and Branched- Chain Fatty Acids in Milk of Dairy Cows

AU - Dewhurst, R. J.

AU - Moorby, J. M.

AU - Vlaeminck, B.

AU - Fievez, V.

PY - 2007/4

Y1 - 2007/4

N2 - This study compared flows of odd- and branched-chain fatty acids (OBCFA) at the duodenum with corresponding yields in milk. Four mid-lactation Holstein-Friesian dairy cows were offered 4 dietary treatments, based on different ratios of ryegrass silage and concentrates (80:20, 65:35, 50:50, and 35:65 on a dry matter basis), in a 4 × 4 Latin square design experiment with 4-wk periods. Samples of milk and duodenal digesta were collected during the final week of each period and analyzed for fatty acids. Biohydrogenation of linoleic and α-linolenic acids (C18:2 and C18:3) was extensive for all treatments, with a tendency to be lower for C18:3 with increased concentrate feeding. The proportion of duodenal flows of these fatty acids that appeared in milk declined with increasing concentrate feeding. There was little change in the yield of OBCFA in milk in response to increasing level of concentrate inclusion and no significant relationship with the yield of microbial protein at the duodenum. The efficiency of transfer of iso C15:0 and anteiso C15:0 from the duodenum to milk was similar to that for C18:3, with a reduced proportion transferred into milk at higher flows. Yields of C15:0, C17:0, and iso C17:0 in milk were higher than duodenal flows, confirming synthesis in animal tissues

AB - This study compared flows of odd- and branched-chain fatty acids (OBCFA) at the duodenum with corresponding yields in milk. Four mid-lactation Holstein-Friesian dairy cows were offered 4 dietary treatments, based on different ratios of ryegrass silage and concentrates (80:20, 65:35, 50:50, and 35:65 on a dry matter basis), in a 4 × 4 Latin square design experiment with 4-wk periods. Samples of milk and duodenal digesta were collected during the final week of each period and analyzed for fatty acids. Biohydrogenation of linoleic and α-linolenic acids (C18:2 and C18:3) was extensive for all treatments, with a tendency to be lower for C18:3 with increased concentrate feeding. The proportion of duodenal flows of these fatty acids that appeared in milk declined with increasing concentrate feeding. There was little change in the yield of OBCFA in milk in response to increasing level of concentrate inclusion and no significant relationship with the yield of microbial protein at the duodenum. The efficiency of transfer of iso C15:0 and anteiso C15:0 from the duodenum to milk was similar to that for C18:3, with a reduced proportion transferred into milk at higher flows. Yields of C15:0, C17:0, and iso C17:0 in milk were higher than duodenal flows, confirming synthesis in animal tissues

KW - dairy cow

KW - fatty acids

KW - biohydrogenation

KW - milk composition

UR - http://hdl.handle.net/2160/43501

U2 - 10.3168/jds.2006-715

DO - 10.3168/jds.2006-715

M3 - Article

C2 - 17369218

VL - 90

SP - 1175

EP - 1780

JO - Journal of Dairy Science

JF - Journal of Dairy Science

SN - 0022-0302

IS - 4

ER -

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