Thesis - Open Access
Master of Science (MS)
Robert J. Baer
Composition of milk and butter was evaluated from cows fed either control, or experimental diets containing added added fat of partially unsaturated fatty acid composition. The control diet concentrate mix consisted mainly of corn and soybean meal. The two experimental diets substituted either 20% high oleic acid sunflower seeds () 79% of fatty acids as oleic acid) or 20% regular sunflower seeds () 67% of fatty acids as linoleic acid) for part of the corn and soybean meal in the concentrate -mix. Milk protein concentration was similar for the control (3.3%) and high oleic sunflower seeds (3.3%), but increased in regular sunflower seed treatment (3.5%). Milk fat concentration was similar for the control (3.0%) and high oleic sunflower seeds (2.7%), but decreased in the regular sunflower seed treatment (2.4%). Feeding lactating dairy cattle sunflower seeds resulted in lower concentrations of short and medium chain and higher concentrations of long chain fatty acids in milk and butter. Milk unsaturated fatty acid concentrations were (28.9, 38.8, 45.6%) and butter unsaturated fatty acid concentrations were (29.6, 38.1, 44.3%) for control, high oleic sunflower seed, and regular sunflower seed treatments, respectively. Penetrometer readings at 4°C (8.1, 11.5, 11.5 mm) and at 20°c (16.6, 26.3, 27.4 mm) were higher for high oleic sunflower seed and regular sunflower seed treatment butter. Organoleptic evaluation indicated the high oleic sunflower seed and regular sunflower seed treatment butters were equal or superior in flavor to the control butter. The high oleic sunflower seed and regular sunflower seed treatment butters were softer, more unsaturated and exhibited acceptable flavor, manufacturing, and storage characteristics.
Library of Congress Subject Headings
Milk -- Composition
Sunflowers -- Seeds
Dairy cattle -- Feeding and feeds
Includes bibliographical references (pages 61-69)
Number of Pages
South Dakota State University
Middaugh, Robert Paul, "Characteristics of Milk and Butter from Cows Fed Sunflower Seeds" (1988). Theses and Dissertations. 1330.