Duodenal Rapeseed Oil Infusion in Early and Midlactation Cows. 1. Intestinal Apparent Digestibility of Fatty Acids and Lipids

• Published in: Journal of dairy science Vol. 74; no. 2; pp. 490 - 498
• Main Authors: Chilliard, Y., Bauchart, D., Gagliostro, G., Ollier, A., Vermorel, M.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.02.1991; Am Dairy Sci Assoc; American Dairy Science Association
• Subjects: aceite de colza; Agricultural sciences; Animals; Brassica; Canola Oil; Cattle - metabolism; dairy cows; digestibilidad; digestibilite; digestibility; Digestion; duodenal infusion; estiercol; excrecion; excretion; farmyard manure; Fatty Acids - metabolism; Fatty Acids, Monounsaturated; Feces - chemistry; Female; fumier; huile de colza; intestin; intestines; Intestines - metabolism; intestinos; lactacion; lactation; Lactation - metabolism; lecithine; lecithins; lecitinas; Life Sciences; Lipid Metabolism; lipide; lipidos; lipids; Plant Oils - metabolism; rapeseed oil; Regression Analysis; vacas lecheras; vache laitiere; EE; rapeseed oil; FA; digestibility; duodenal infusion; COLZA
• ISSN: 0022-0302; 1525-3198
• DOI: 10.3168/jds.S0022-0302(91)78196-4

Rapeseed oil was infused continuously into the duodenum of lactating dairy cows. Five separate trials were conducted with differences in amount of oil infused (1.0 to 1.5 kg/d), in lactation stage (early to late), and in basal diet (corn or grass silages). The effects of lecithin addition (9 g/d) also were studied. Oil infusion did not affect the apparent digestibility of defatted organic matter. Fatty acid, ether extract, and total lipid digestibilities in control cows were 62 to 82%, 72 to 76%, and 59 to 73%, respectively. Intestinal apparent digestibilities of oil fatty acid and ether extract fractions were estimated to be 63 to 74% and 67 to 81%, respectively. Intestinal apparent digestibility of oil total lipids was only 20 to 57% due to a significant increase in nonfatty acid lipid excretion (160 to 750 g/d above control cows), which sharply decreased the energy value of the infused oil. Lecithin did not modify apparent digestibility in oil-infused cows.