Date of Award
Master of Science
Lance H. Baumgard
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.
Nathan Charles Upah
Upah, Nathan Charles, "Dietary strategies to improve periparturient success of Holstein cows" (2012). Graduate Theses and Dissertations. 12491.