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Permanent link (DOI): https://doi.org/10.7939/R3JK6Z

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Effects of Supplemental dietary starch on production and reproductive characteristics in postpartum dairy cows Open Access

Descriptions

Other title
Subject/Keyword
Postpartum
Starch
Reproduction
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Dyck, Brittany L
Supervisor and department
Doepel, Lorraine (Agricultural, Food and Nutritional Science)
Dyck, Michael (Agricultural, Food and Nutritional Science)
Examining committee member and department
Ambrose, Divakar (Alberta Agriculture and Rural Development)
Chang, John (Biological Sciences)
Department
Department of Agricultural, Food and Nutritional Science
Specialization

Date accepted
2009-08-20T16:14:07Z
Graduation date
2009-11
Degree
Masters of Science
Degree level
Master's
Abstract
This study evaluated the effects of dietary starch on productive and reproduction parameters of postpartum dairy cows. Three diets were fed, with increasing starch levels from calving until 70 days in milk. Treatment had no effect on dry matter intake, energy balance, specific metabolic hormones and metabolites, milk yield, or milk components with the exception that cows fed the low starch diet had higher levels of milk urea nitrogen. Cows fed the high starch tended to lose less body condition, had a shorter interval from calving to first ovulation, and a higher incidence of double first ovulations. There were no treatment effects on ovarian dynamics, luteinizing hormone, progesterone or estradiol concentrations. Number of cows confirmed pregnant 30 d after first insemination did not differ between treatments. Increasing dietary starch decreased the interval from calving to first ovulation, but had no impact on productivity and metabolic status of the postpartum cow.
Language
English
DOI
doi:10.7939/R3JK6Z
Rights
License granted by Brittany Dyck (blwood@ualberta.ca) on 2009-08-19T16:11:01Z (GMT): 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 the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein 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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