Document Type

Thesis - Open Access

Award Date

1987

Degree Name

Master of Science (MS)

Department

Dairy Science

First Advisor

Joel Sommerfeldt

Abstract

Thirty lactating Holstein cows were randomly assigned to one of three diets to evaluate chickpeas as a dietary supplement from wk 4 to 16 postpartum. Diets contained chickpeas at 0, 50, and 100 % of the concentrate dry matter in place of corn and soybean meal. Total mixed diets, fed individually, contained concentrate corn silage and alfalfa hay at 52, 32, and 16 % of the dry matter. Milk yield (34.5, 35.1, 35.7 kg/d) was higher for cows fed 100 % chickpeas than 0 % chickpeas. Fat (3.06, 3.09, 3.28 %) was highest for cows fed 100 % chickpeas. Milk medium (C12-C16 ) chain fatty acids ( 53.8, 48.6, 45.5 g/l00 g fat) and long chain (C18 ) fatty acids (29.4, 35.0, 38.8 g/l00 g fat) and milk protein (3.20, 3.09, 2.96 %) differed for all three diets. Ruminal acetate: propionate ratio {2.03, 1.98, 2.39) was highest for cows fed 100 % chickpeas. Total serum essential amino acid concentration (105.3, 95.9, 89.4 umoles/dl) was higher for cows fed 0 % chickpeas than 100 % chickpeas. Lactational responses are discussed with respect to increased intake of fat, increased dietary protein degradablility, and decreased plasma essential amino acids.

Library of Congress Subject Headings

Chickpea -- Nutrition
Dairy cattle -- Feeding and feeds

Description

Includes bibliographical references (pages 74-94)

Format

application/pdf

Number of Pages

103

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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