Effet de la nature de la ration et d'un supplément lipidique sur l'hydrogénation des acides gras polyinsaturés dans le rumen de la vache

Ferlay, Anne; Chabrot, J.; Krzemiński, R.; Salem, H. Ben; Doreau, M.

doi:10.1051/rnd:19910316

Cited by 2 publications

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“…In our trial, Ca salts of FA were as biohydrogenated as triglyceride FA. These results are consistent with recent data from Ferlay et al (1991Ferlay et al ( , 1992 with rapeseed oil FA triglycerides and Ca salts, respectively. Our data confirmed the indirect results of the study by Kankare et al (19891, in which feeding Ca salts of rapeseed oil, compared with rapeseed oil itself, increased the proportion of trans-monoenic acids and decreased the contents of oleic and linolenic acids in milk.…”

Section: Discussionsupporting

confidence: 93%

Ruminal lipid balance and intestinal digestion by dairy cows fed calcium salts of rapeseed oil fatty acids or rapeseed oil

Ferlay

Chabrot

Elmeddah

et al. 1993

Journal of Animal Science

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The effects of supplemental calcium salts of rapeseed oil fatty acids (FA) and rapeseed oil on ruminal metabolism and apparent digestibility of lipids in the small intestine were studied using three multiparous Holstein x Friesian cows in a 3 x 3 Latin square design. Cows fitted with ruminal, duodenal, and ileal cannulas were fed restricted amounts of a control diet (C) containing 65% corn silage and 35% concentrate mix or diet C with supplemental calcium salts of rapeseed oil FA (S) or diet C supplemented with rapeseed oil (O). Fatty acid contents were 1.9, 8.4, and 7.6% for diets C, S, and O, respectively. The average flow of total FA to the duodenum was lower than the intake for supplemented treatments, suggesting catabolism of FA by ruminal microbes. Fatty acid flows at the duodenum were higher (P < .10) for diets supplemented with fat than for diet C, except for C18: 3(n-3) and straight-chain and branched-chain C15 and C17. Fat treatment affected total and individual FA flow to the ileum, except C14:0 and C18:2(n-6) and excreted amount of individual FA, except C14:0, C16:0, and total C18:1. In our trial, the addition of fat, regardless of origin, affected small intestinal digestibilities of C14:0 and C18:2(n-6) and did not affect changes in the amount of FA in the hindgut.

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Section: Discussionsupporting

confidence: 93%

Ruminal lipid balance and intestinal digestion by dairy cows fed calcium salts of rapeseed oil fatty acids or rapeseed oil

Ferlay

Chabrot

Elmeddah

et al. 1993

Journal of Animal Science

Self Cite

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Effects of calcium salts differing in fatty acid composition on duodenal and milk fatty acid profiles in dairy cows

Ferlay¹,

Chilliard²,

Doreau³

1992

J Sci Food Agric

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Ruminal biohydrogenation of fatty acids (FA) was studied in uiuo in relation with the fermentation pattern in the rumen and milk secretion. Calcium salts (Ca salts) of palm oil (diet 1) or rapeseed oil (diet 2) were given to dairy cows (about 650 gday-') in a diet based on maize silage. Significant variation in propionate concentration was observed among diets. Rumen pH and total volatile fatty acids (VFA) did not change. Duodenal FA pattern was analysed throughout the day. With diets 1 and 2, linoleic acid was to a large extent biohydrogenated: calculations of ruminal biohydrogenation were equal to 63.6 and 74.0 % for diets I and 2, respectively. No difference between diets was observed in milk production, fat and protein percentages. The percentages of stearic and octadecenoic FA in milk were higher and the percentage of palmitic acid was lower with Ca salts of rapeseed oil FA than with Ca salts of palm oil FA.

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Effet de la nature de la ration et d'un supplément lipidique sur l'hydrogénation des acides gras polyinsaturés dans le rumen de la vache

Cited by 2 publications

References 0 publications

Ruminal lipid balance and intestinal digestion by dairy cows fed calcium salts of rapeseed oil fatty acids or rapeseed oil

Ruminal lipid balance and intestinal digestion by dairy cows fed calcium salts of rapeseed oil fatty acids or rapeseed oil

Effects of calcium salts differing in fatty acid composition on duodenal and milk fatty acid profiles in dairy cows

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