Document Type

Thesis - Open Access

Award Date

1988

Degree Name

Master of Science (MS)

Department

Dairy Science

First Advisor

Robert J. Baer

Abstract

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

Description

Includes bibliographical references (pages 61-69)

Format

application/pdf

Number of Pages

77

Publisher

South Dakota State University

Rights

In Copyright - Non-Commercial Use Permitted
http://rightsstatements.org/vocab/InC-NC/1.0/

Included in

Dairy Science Commons

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