NDLI: Métabolisme ruminai et digestibilité des acides gras des fourrages

Content Provider	Semantic Scholar
Author	Doreau, Michel Lee, Matthew R. Ueda, Kiyoshi Scollan, Nigel David
Copyright Year	2005
Abstract	Les fourrages presentent de faibles teneurs en lipides mais sont riches en acide linolenique et donc susceptibles de fournir des acides gras (AG) polyinsatures aux animaux. Le devenir des AG dans le rumen et leur digestibilite sont mal connus. Une serie de 4 essais a compare trois formes de conservation (vert, ensile, fane ou enrubanne) de 4 fourrages (2 dactyles, trefle violet, ray-grass anglais) sur des moutons pourvus de canules. Le sechage du fourrage a provoque une diminution importante de la teneur en AG, de la proportion d'acide linolenique, mais aussi du degre d'hydrogenation, ce qui a limite les variations d'AG absorbables. On observe au niveau duodenal une grande variete d'isomeres monoinsatures trans a 18 atomes de carbone, dont l'acide transvaccenique est le plus important, mais des teneurs tres faibles en acides linoleiques conjugues (CLA) suggerant que le CLA du lait et de la viande provient tres majoritairement de la desaturation de l'acide transvaccenique.[.]
Starting Page	101
Ending Page	104
Page Count	4
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.journees3r.fr/IMG/pdf/2005_qualite_aliments_ruminants_03_doreau.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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