[Effect of feeding rapeseed oil to dairy cows on the fatty acid composition of butterfat].
Butter is rich in lauric, myristic, and palmitic acids which are assumed to be hypercholesterolemic. The replacement of usual dietary fat by rapeseed oil induces a serum cholesterol decrease. The objective of the study consisted in measuring the influence of feeding different amounts of full-fat rapeseed or oil-rich rapeseed cake to dairy cows to improve the fatty acid composition of milk fat. The results demonstrate a significant increase of iodine number and spreadability of butter. The percentage of lauric+myristic+palmitic acid (LMP) decreased by about 18% of whole fatty acids. Stearic and oleic acid increased significantly but the percentage of trans octadecenoic acid increased too. It can be concluded that the special butter has a nutritionally improved fat characterized by an increase of cholesterol-lowering fatty acids (C18 and C18:1) and a decline of cholesterol-elevating fatty acids (LMP).
Jahreis
G
G
Thüringer Landesanstalt für Landwirtschaft, Jena.
Steinhart
H
H
Pfalzgraf
A
A
Flachowsky
G
G
Schöne
F
F
D000818:Animals; D001937:Brassica; D002079:Butter / Q000032:analysis*; D002417:Cattle; D002791:Cholesterol, Dietary; D004041:Dietary Fats; D005227:Fatty Acids / Q000032:analysis*; D005229:Fatty Acids, Monounsaturated; D005260:Female; D007454:Iodides / Q000032:analysis; D007785:Lactose / Q000032:analysis; D010938:Plant Oils / Q000494:pharmacology*; D000074262:Rapeseed Oil; D012044:Regression Analysis; D014810:Vitamin E / Q000032:analysis
D002791:Cholesterol, Dietary; D004041:Dietary Fats; D005227:Fatty Acids; D005229:Fatty Acids, Monounsaturated; D007454:Iodides; D010938:Plant Oils; D000074262:Rapeseed Oil; D014810:Vitamin E; D002079:Butter; D007785:Lactose
Zur Wirkung von Rapsölfütterung an Milchkühe auf das Fettsäurenspektrum des Butterfettes.