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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"lactating dairy cattle"”.
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Heat-Treated Soybean Proteins for Lactating Dairy Cattle
… improved their value slightly as a feed for lactating cows, but milk production by cows past peak production was not significantly greater than production achieved with conventional corn-soybean meal diets.</p>
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Ruminal Nitrogen Recycling and Nitrogen Efficiency in Lactating Dairy Cattle
… and poses a risk to human health. Although the dairy industry utilizes milk urea N (MUN) to monitor protein feeding and N excretion, phenotypic diversity among cows may influence MUN and thus bias feed management. An initial study using data from 2 previously published research trials and a …
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Offering sodium bentonite and sodium bicarbonate free-choice to lactating dairy cattle
The objective of this experiment was to evaluate the effects of free-choice intake of sodium bentonite and sodium bicarbonate on physiological and production parameters. Eight Jerseys and seventeen Holsteins (four fistulated) were randomly assigned to two groups to equalize stage of lactation, age …
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Serial measurements of circulating glucose and luteinizing hormone concentrations in lactating dairy cattle
… glucose sensors designed for humans for use in lactating dairy cattle. The first experiment required validation of a bovine LH ELISA in order to measure the circulating concentration of LH in the blood of cows in altered thermal and/or metabolic states. Assays from two separate companies were …
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Systemic and Intracellular Trafficking of Long-chain Fatty Acids in Lactating Dairy Cattle
… additives to provide omega-3 fatty acids to dairy cows. Supplementing dairy cows with omega-3 fatty acid-rich feeds does not easily increase quantities in milk fat of dairy cows because polyunsaturated fatty acids are biohydrogenated in the rumen. Lipid encapsulation of omega-3 fatty acids …
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Manipulation of Endogenous Growth Hormone in Growing or Lactating Dairy Cattle: Effects on Production
… of GH increases milk production and growth of lactating and growing ruminants. Two nutritional components (sodium bicarbonate and arginine) and immunization against somatostatin were investigated as potential means of altering endogenous GH concentrations and animal production.
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The Use of Whole-Rolled Sunflower Seeds with or without Additional Limestone in Lactating Dairy Cattle Rations
<p>Thirty Holstein cows were utilized in a lactation trial evaluating diets containing whole-rolled sunflower seeds. Cows were randomly assigned to treatments, grouped according to previous milk production and lactation number. The cows were fed one of three diets: 1) the control was a com-soybean …
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The Influence of Heat Stress on Milk Yield, Gastrointestinal Permeability, and Nutrient Partitioning in Lactating Dairy Cattle
The US dairy industry loses approximately $1.2 billion due to heat stress related production losses annually. It was formerly believed that heat-stressed lactating dairy cattle produce less milk because they consume less feed. It has since been established that the reduction of feed intake is only …
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The utilization of banana meal as a substitute for traditional high energy feeds for lactating dairy cattle in Ecuador
… (M.S.)--Michigan State University. Dept. of Dairy Science, 1976
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The Relationships Between the Ruminal Digestibility Kinetics of Fiber, Total-Tract Nutrient Digestibility, and Methane Emissions from Lactating Dairy Cattle
The efficiency of fiber utilization in dairy cattle plays a central role in optimizing production performance while minimizing environmental impacts, particularly enteric methane (CH4) emissions. Ruminal degradation and passage kinetics of fiber fractions, potentially degradable (pdNDF) and …
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Effects of mixer type on utilization of diets with increasing amounts of modified wet distillers grains with solubles for lactating dairy cattle
Our objective was to determine if methods for preparing TMR [Keenan MechFiber (KMF) technology vs. vertical auger (VA) mixer] would alter physical form of the TMR and affect utilization of modified wet distillers grains with solubles (MWDGS). Holstein cows (n = 24 with 12 ruminally cannulated; 144 …
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Steam-Flaked Soybeans in Dairy Cattle Diets
… feeding properties of steam-flaked soybeans in lactating dairy cattle. One component of the investigation was an in situ study that evaluated the rumen degradability and intestinal digestibility of steam-flaked soybeans. A second component of this research investigated the effect of particle …
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Toxicity and Metabolism of Deoxynivalenol; A Study in Swine, Cattle and Rats
… elimination pattern of DON and metabolites in lactating dairy cattle were determined. Results led us to the in vitro production of the de-epoxy metabolite of DON, DOM-1 and to metabolism studies using rat and swine hepatic microsomal preparations.
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Effects of direct-fed Bacillus pumilus 8G-134 (NRRL B-50174) on ruminal and fecal microbial populations of pre- and postpartum Holstein cows
… on rumen and fecal microbial contents from lactating dairy cattle. These techniques aided in detecting changes in gastrointestinal tract microbial community populations. Phylogenetic 16S analysis identified the microbes present and bioinformatic techniques, i.e. Qiime and Oligotyping …
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Characteristics of Milk and Butter from Cows Fed Sunflower Seeds
… regular sunflower seed treatment (2.4%). Feeding lactating dairy cattle sunflower seeds resulted in lower concentrations of short and medium chain and higher concentrations of long chain fatty acids in milk and butter. Milk unsaturated fatty acid concentrations were (28.9, 38.8, 45.6%) and butter …
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Evaluating the impact of heat stress and altered glycemic state on plasma ɣ-Aminobutyric Acid (GABA) in lactating Holstein cows
… induces hyperinsulinemia and hypoglycemia in lactating dairy cows. We hypothesized that γ-aminobutyric acid (GABA) participates in the regulation of this altered glycemic state as it is produced by the pancreatic beta cells and has a stimulatory effect on pancreatic secretion of insulin. …
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Health and Welfare Implications of Temperament Differences in Dairy Cattle
Dairy cattle exhibit consistent variation in behaviour between individuals, referred to as temperament. In humans consistent variation in behaviour is referred to as personality and has significant associations with health and wellbeing. The studies reported in this thesis investigated whether …
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An Evaluation of High Protein Oat Forage for Dairy Cattle
… ruminants, the most efficient is the dairy cow. Sixty-four percent of the feed consumed by dairy cattle is forage (40), the remaining portion consists of feed products not fit for human consumption. Dairy cattle convert 25% of the protein and 17% of the energy consumed as feed …
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IMPROVING REPRODUCTIVE PERFORMANCE THROUGH THE DEVELOPMENT OF A DAIRY HERD INDEX, INTRAUTERINE HORMONE DELIVERY OR INSEMINATION TECHNIQUE IN LACTATING COWS
Improving reproductive performance of dairy cattle is paramount to maximize productivity and sustainability of dairy operations. The present dissertation includes three specific aims containing a series of five experiments (Chapters) aimed at improving reproductive performance in lactating dairy …
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Utilizing near-infrared technology to assess changes in corn silage dry matter and the effects of feeding a starling resistant supplement to dairy cattle
… supplement in total mixed rations (TMR) for lactating dairy cattle. Study 1 evaluated the accuracy of three NIR units (Digi-Star Moisture Tracker, Topcon Agriculture, Fort Atkinson, WI), food dehydrator (FD) (Nesco®, Two Rivers, WI), and a Koster Tester (KT) (Koster Moisture Tester, Inc., …
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