Document Type

Thesis - Open Access

Award Date

1987

Degree Name

Master of Science (MS)

Department / School

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/

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