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Open AccessArticle

Effect of Feeding Cold-Pressed Sunflower Cake on Ruminal Fermentation, Lipid Metabolism and Bacterial Community in Dairy Cows

NEIKER-Granja Modelo de Arkaute, Apdo. 46., 01080 Vitoria-Gasteiz, Spain
CICbioGUNE. Parque Científico Tecnológico de Bizkaia, Ed. 801A. Derio, 48160 Bizkaia, Spain
Authors to whom correspondence should be addressed.
Animals 2019, 9(10), 755;
Received: 14 August 2019 / Revised: 11 September 2019 / Accepted: 27 September 2019 / Published: 1 October 2019
(This article belongs to the Collection Use of Agricultural By-Products in Animal Feeding)
The use of cold-pressed sunflower cake, a by-product of small-scale biodiesel manufacturing, as a substitute for prilled palm fat in dairy cows’ diet, can reduce the extent of unsaturated fatty acid biohydrogenation This favors an accumulation of vaccenic acid in the rumen concomitant with a greater daily duodenal microbial N flow and all without impairing ruminal fermentation, microbial diversity or abundance of dominant populations. In the present study, only changes in relative abundances of less-representative genera were induced.
Cold-pressed sunflower cake (CPSC), by-product of oil-manufacturing, has high crude fat and linoleic acid concentrations, being a promising supplement to modulate rumen fatty acid (FA) profile. This trial studied CPSC effects on ruminal fermentation, biohydrogenation and the bacterial community in dairy cows. Ten cows were used in a crossover design with two experimental diets and fed during two 63-day periods. The cows were group fed forage ad libitum and the concentrate individually. The concentrates, control and CPSC, were isoenergetic, isoproteic and isofat. The ruminal samples collected at the end of each experimental period were analyzed for short-chain fatty acid, FA and DNA sequencing. CPSC decreased butyrate molar proportion (4%, p = 0.005). CPSC decreased C16:0 (28%, p < 0.001) and increased C18:0 (14%, p < 0.001) and total monounsaturated FA, especially C18:1 trans-11 (13%, p = 0.023). The total purine derivative excretion tended to be greater (5%, p = 0.05) with CPSC, resulting in a 6% greater daily microbial N flow. CPSC did not affect the diversity indices but increased the relative abundances of Treponema and Coprococcus, and decreased Enterococcus, Ruminococcus and Succinivibrio. In conclusion, the changes in ruminal fermentation and the FA profile were not associated with changes in microbial diversity or abundance of dominant populations, however, they might be associated with less abundant genera. View Full-Text
Keywords: biohydrogenation; sunflower cake; microbiota biohydrogenation; sunflower cake; microbiota
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Zubiria, I.; Garcia-Rodriguez, A.; Atxaerandio, R.; Ruiz, R.; Benhissi, H.; Mandaluniz, N.; Lavín, J.L.; Abecia, L.; Goiri, I. Effect of Feeding Cold-Pressed Sunflower Cake on Ruminal Fermentation, Lipid Metabolism and Bacterial Community in Dairy Cows. Animals 2019, 9, 755.

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  • Supplementary File 1:

    ZIP-Document (ZIP, 93 KB)

  • Externally hosted supplementary file 1
    Doi: 10.5281/zenodo.3356548
    Description: SFigure1. OTUs at genus level significantly different (p<0.05) between rumen samples of cows fed control and cold-pressed sunflower cake in the first period of the experiment (n=5) SFigure2. Relationships between clusters of bacterial genus and rumen short-chain fatty acids independently of treatment. This bipartite network was based on the regularized canonical correlations between relative bacterial abundances and relative concentrations of rumen short-chain fatty acids. Interactions have been filtered for an absolute correlation above 0.55 and are colored following the key shown.
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