Appréciation de l'hydrogénation des acides gras alimentaires dans le rumen de la vache : étude méthodologique préliminaire
Open Access
- 1 January 1989
- journal article
- research article
- Published by EDP Sciences in Animal Research
- Vol. 38 (2-3) , 139-144
- https://doi.org/10.1051/animres:19890208
Abstract
Ruminal hydrogenation of fatty acids was studied by an in vivo method. Two lipid sources (rapeseed oil or calcium palm oil soaps) were given to dairy cows very rapidly (about 850 g within 15 min). Duodenal fatty acid pattern was analyzed all day long. With the two diets, linoleic acid linoleic acid appeared extensively hydrogenated: they accounted for 2-3 and 1-2%, respectively of the 18 carbon-fatty acids of the duodenal contents. Octadecenoic fatty acids represented 40 to 50% of the 18 carbon-fatty acids. This percentage was slightly higher with rapeseed oil than with calcium soaps. Prandial variations were low. The proportion of propionic acid in rumen VFA seemed to be related to this percentage and was higher with rapeseed oil, which could be related to larger variations in ruminal fermentations than with calcium soaps.This publication has 1 reference indexed in Scilit:
- Effect of Fatty Acids or Calcium Soaps on Rumen and Total Nutrient Digestibility of Dairy RationsJournal of Dairy Science, 1984