Zur Wirkung von Rapsölfütterung an Milchkühe auf das Fettsäurenspektrum des Butterfettes
- 1 June 1996
- journal article
- Published by Springer Nature in Zeitschrift Fur Ernahrungswissenschaft
- Vol. 35 (2) , 185-190
- https://doi.org/10.1007/bf01622868
Abstract
Butter weist einen hohen Anteil an Laurin-, Myristin-und Palmitinsäure auf, die als hypercholesterämisch gelten. Ein Austausch des üblichen Nahrungsfettes durch Rapsöl bewirkt beim Menschen einen Abfall des Serumcholesterols. Durch Verfütterung verschiedener Mengen von Vollfettraps und ölreichem Rapskuchen an Milchkühe sollte geprüft werden, inwieweit das Fettsäurenspektrum der Milch qualitativ zu verbessern ist. Die Ergebnisse zeigen einen signifikanten Anstieg der Jodzahl und damit der Streichfähigkeit des Butterfettes. Die Anteile an Laurin-, Myristin-und Palmitinsäure (LMP) verminderten sich um etwa 18 % der Gesamtfettsäuren. Signifikante Anstiege ergaben sich besonders für die Stearin- und Ölsäure, aber auch für dietrans-Vaccensäure. Es kann gefolgert werden, daß durch den erhöhten Anteil an cholesterolsenkenden Fettsäuren (C18 und C18:1) sowie die Abnahme der cholesterolsteigernden Fettsäuren (LMP) eine Butter mit verbesserten ernährungsphysiologischen Eigenschaften zur Verfügung steht. 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 oftrans 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).Keywords
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