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Skip to Search Results- 1Behrouzi, Amir
- 1Deng, Qilan
- 1Espinoza, Oswaldo S
- 1Haisan, Jennifer L
- 1Iqbal, Summera
- 1Macmillan, Kira A
- 3Oba, Masahito (Agricultural, Food and Nutritional Science)
- 2Oba, Masahito (Agricultural, Food, and Nutritional Science)
- 1Ambrose, Divakar (Department of Agricultural, Food and Nutritional Science)
- 1Ambrose, Divakar. J. (Agricultural, Food and Nutritional Science)
- 1Ametaj, Burim (Agricultural, Food and Nutritional Science)
- 1Ametaj, Burim N. (Agricultural, Food and Nutritional Science)
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Application of intravaginal lactic acid bacteria to lower uterine infections and improve reproductive performance of postpartum dairy cows
DownloadSpring 2015
Transition dairy cows are susceptible to uterine infections due to the compromised immunity around calving and substantial bacterial contamination in the uterus immediately after calving. Cows with uterine infections are at higher odds of developing other periparturient diseases, resulting in...
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Effect of porcine luteinizing hormone on intrafollicular milieu and gene expression in granulosa cells and oocytes in dairy cows
DownloadSpring 2014
In previous research, the use of porcine luteinizing hormone (pLH) in lieu of gonadotropin-releasing hormone (GnRH) for synchronizing ovulation in a fixed-timed artificial insemination protocol in dairy cows improved pregnancy rates (42 vs 28%) without increasing progesterone concentrations. The...
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Effects of feeding 3-nitrooxypropanol to lactating dairy cows on methane emissions, animal performance and rumen fermentation
DownloadFall 2014
Methane emissions from ruminants are of great concern as they contribute to greenhouse gasses emitted within the atmosphere. The objective of this research was to evaluate a novel biochemical compound, 3-nitrooxypropanol, on its ability to reduce methane emissions and its impact on animal...
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Spring 2016
The goals of this research were to evaluate the interaction effects between photoperiod management and dietary grain allocation in lactating dairy cows and to determine if any relationships exist between photoperiod management and the persistency of lactation in selected dairy herds in Alberta....
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Fall 2012
Sub-acute ruminal acidosis is a digestive disorder experienced by animals fed a high grain diet, and causes substantial economic loss to the dairy industry. The objective of this research was to evaluate novel approaches to manage and prevent sub-acute ruminal acidosis. In Study 1, I found that...
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Identification of biomarkers associated with the onset and progression of ketosis in transition dairy cows
DownloadFall 2016
Ketosis is a common metabolic disorder of transition dairy cows during the early lactation period. Cows with ketosis have lower milk yield and reproductive performance, greater risk of other periparturient diseases, and higher culling rate. Although ketosis has been extensively studied, not many...
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Novel Mucosal Vaccines to Improve Immune and Health Status of Periparturient Dairy Cows and Increase their Productive Potentials
DownloadFall 2013
The transition period is critical for the health and productivity of dairy cows. Feeding high-grain diets immediately after parturition is necessary to support high milk production. However, high-grain diets are associated with acidic rumen pH and alterations in the composition of rumen...
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Repeatability of anogenital distance in Holstein cattle and its association with embryo yield and quality
DownloadSpring 2021
Reproductive phenotypes that are easy to measure, have high genetic variation and heritability along with good repeatability are being explored for genetic selection of cows for improved fertility. In this regard, anogenital distance (AGD; the distance from the center of the anus to the base of...
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The Effect of Risk for Subacute Ruminal Acidosis, Feeding Frequency, and Photoperiod on the Feeding Behaviour of Lactating Dairy Cows
DownloadFall 2016
Cows fed the same high-grain diet have a large variation in rumen pH and can be categorized as higher or lower risk for developing subacute ruminal acidosis (SARA). The objective of this research was to determine if differences in feeding behaviour existed between the two categories and if these...
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Understanding the role of diets enriched in long chain fatty acids on postpartum reproductive function and embryo development in dairy cows
DownloadSpring 2016
The objectives of this work were to investigate the influence of diets enriched in long chain fatty acids on feed intake, calf birth weight, maternal and neonatal fatty acid profiles, milk production, postpartum reproductive function, early embryonic development and its transcriptome profile in...