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
Copyright Date
2012
Language
en
Date Available
2012-10-31
File Format
application/pdf
File Size
181 pages
Recommended Citation
Upah, Nathan Charles, "Dietary strategies to improve periparturient success of Holstein cows" (2012). Graduate Theses and Dissertations. 12491.
https://lib.dr.iastate.edu/etd/12491
