Degree Type

Thesis

Date of Award

2012

Degree Name

Master of Science

Department

Animal Science

First Advisor

Lance H. Baumgard

Abstract

Cows in early lactation enter into a state of negative energy balance due to their high energetic demands and inability to consume adequate amounts of dietary energy. During this period, the transition cow is at increased risk of experiencing health or metabolic disorders, which can limit production and ultimately farm profitability. The broad based objective of this thesis was to examine the potential beneficial effects of supplementing conjugated linoleic acid (CLA) or organic zinc (OZ) during the periparturient period. Feeding CLA reduced milk fat content in early lactation, but did not improve other aspects of milk production, health indices or reproductive parameters. Supplementing OZ increased colostrum immunoglobulin G (IgG) concentration and milk urea nitrogen (MUN) in multiparous cows. However, feeding increasing OZ did not affect milk yield, feed efficiency or plasma bioenergetics variables.

DOI

https://doi.org/10.31274/etd-180810-349

Copyright Owner

Nathan Charles Upah

Language

en

Date Available

2012-10-31

File Format

application/pdf

File Size

181 pages

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