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Effect of Linseed Fed as Rolled Seeds, Extruded Seeds or Oil on Fatty Acid Rumen Metabolism and Intestinal Digestibility in Cows

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Lipids

Abstract

Linseed, a source of linolenic acid, is used in ruminant diets to increase polyunsaturated fatty acids (FA) in animal products. Seed processing is known to have an impact on FA rumen metabolism, but few data are available for linseed. We studied the effect of linseed lipid on ruminal metabolism and intestinal digestibility in cows. Three modes of linseed processing: rolled linseed (RL), extruded linseed (EL) and linseed oil plus linseed meal (LO), supplemented at 7.5% of DM intake, were compared to a control diet (C). Duodenal flows, intestinal digestibility and plasma composition were determined. The duodenal flow of linolenic acid was similar among diets. The sum of t10 and t11-18:1, which were coeluted, was increased with lipid-supplemented diets and represented more than 60% of trans 18:1 for EL and LO diets. The main 18:2 isomers were c9, c12 and t11, c15 among the non-conjugated isomers, and t11, t13 among CLA. Linseed supplementation increased the duodenal flow of unsaturated intermediates of biohydrogenation, and this effect was more pronounced for extruded seeds and oil than for rolled seeds. For most 18-carbon FA, intestinal digestibility was slightly higher for C and LO diets than for RL and EL. Plasma concentrations of non-conjugated 18:2 and linolenic acid were similar among the lipid-supplemented diets. Within diet, profiles of 18:1 isomers (except c9) remained very similar between duodenal and plasma FA.

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Abbreviations

BH:

Biohydrogenation

C:

Control diet

CLA:

Conjugated linoleic acid

DM:

Dry matter

EL:

Extruded linseed

FA:

Fatty acid

LO:

Linseed oil

RL:

Rolled linseed

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Acknowledgments

This experiment was funded by the ACTA (Association pour la Coopération Technique Agricole, Paris, France). The authors thank the various INRA staff for their skills in animal care, feeding and sampling.

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Authors and Affiliations

  1. INRA, UR1213 Herbivores, Site de Theix, 63122, Saint-Genès-Champanelle, France

    Michel Doreau, Sophie Laverroux & Frédéric Glasser

  2. Institut de l’Elevage, Service Viande, 5 rue Hermann Frenkel, 69364, Lyon Cedex 07, France

    Jérôme Normand

  3. Valorex, 35210, Combourtillé, France

    Guillaume Chesneau

Authors
  1. Michel Doreau
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  2. Sophie Laverroux
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  3. Jérôme Normand
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  4. Guillaume Chesneau
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  5. Frédéric Glasser
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Corresponding author

Correspondence to Michel Doreau.

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Doreau, M., Laverroux, S., Normand, J. et al. Effect of Linseed Fed as Rolled Seeds, Extruded Seeds or Oil on Fatty Acid Rumen Metabolism and Intestinal Digestibility in Cows. Lipids 44, 53–62 (2009). https://doi.org/10.1007/s11745-008-3250-x

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  • DOI: https://doi.org/10.1007/s11745-008-3250-x

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