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Permanent link (DOI): https://doi.org/10.7939/R3QH6T

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Ruminal acidosis in dairy calves during the weaning transition Open Access

Descriptions

Other title
Subject/Keyword
dairy calves
weaning
ruminal acidosis
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Laarman, Anne Hermen
Supervisor and department
Oba, Masahito (Agricultural, Food and Nutritional Science)
Examining committee member and department
Keelan, Monika (Laboratory Medicine & Pathology)
Guan, Leluo (Agricultural, Food and Nutritional Science)
Zijlstra, Ruurd (Agricultural, Food and Nutritional Science)
Department
Department of Agricultural, Food, and Nutritional Science
Specialization

Date accepted
2011-01-09T17:40:01Z
Graduation date
2011-06
Degree
Master of Science
Degree level
Master's
Abstract
The goal of this research was to evaluate the effects of calf starter fermentation on rumen pH, metabolic adaptation of ruminal epithelia and growth of calves during the weaning transition. In study 1, calf starter consumption increased short chain fatty acid concentration in the rumen and changed expression of genes involved in ketogenesis and intracellular pH regulation but did not affect rumen pH. In study 2, decreasing dietary starch content did not increase rumen pH. However, feeding a calf starter that had the highest in situ dry matter disappearance lowered rumen pH without adversely affecting feed intake and growth of calves. These findings suggest that rumen epithelium can metabolically adapt to increased fermentation in the rumen at molecular level, and that sub-acute rumen acidosis may not adversely affect feed intake and productivity of dairy calves during the weaning transition.
Language
English
DOI
doi:10.7939/R3QH6T
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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