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Articles 1 - 13 of 13
Full-Text Articles in Dairy Science
The Prevalence And Impact Of Dairy/Beef Crosses On Cattle Producers In New Hampshire, Eleanor J. Braun
The Prevalence And Impact Of Dairy/Beef Crosses On Cattle Producers In New Hampshire, Eleanor J. Braun
Honors Theses and Capstones
Recent years had seen a significant rise in the use of beef semen on dairy cows in the United States. This trend was not widely understood, especially as it related to dairy farmers in New Hampshire. A survey was sent out by mail to the ninety-seven dairy farms in New Hampshire. There were thirty-seven responses to the survey. Thirty-two out of thirty-seven respondents bred beef semen to their dairy cows. Twenty-one of these respondents raised dairy x beef on their farms and twenty-six planned to continue breeding dairy x beef. The most common breeds used in dairy x beef crosses …
Nutritive Comparison Of Ruminant Feed, Integrating Crab And Lobster Meal, Kelsi L. Devolve
Nutritive Comparison Of Ruminant Feed, Integrating Crab And Lobster Meal, Kelsi L. Devolve
Honors Theses and Capstones
In attempts to increase livestock production and decrease waste products from the seafood industry, crab meal and lobster meal were tested as a potential cattle feed ingredient. Jonah crab waste, Atlantic Red crab waste, soybean meal, and blood meal were collected from various vendors and utilized in an in vitro study, an in situ study, and a nitrogen analyzer to determine crude protein in each feed. After allowing the samples to sit in a DAISY incubator for 48 h, mimicking a rumen environment, degradability for the soybean meal, blood meal, lobster meal, and crab meal were 100.13%, 76.36%, 43.77%, and …
Assessing The Bioavailability Of Infused Lysine And Rumen-Protected Lysine Supplements Using The Area Under The Curve Technique And The Plasma Free Amino Acid Dose-Response Method, Megan Vetter
Honors Theses and Capstones
The milk production of lactating dairy cows is dependent on factors such as housing conditions, lineage, climate, and health, but the quality of their diets is generally the most influential. Maintaining a proper balance of nutrients is necessary to achieve the greatest milk production at the lowest cost. Maximum feed efficiency is not only critical for increasing the economic profits of an individual farm, but also for increasing food supply without increasing environmental demand. Supplementing cows’ diets with lysine (Lys), an essential amino acid (AA), can aid in maximizing protein synthesis. Providing this nutrient in a rumen-protected (RP) coating can …
Comparing The Effects Of Monensin And Sodium Butyrate On Coccidia In Post-Weaned Heifers, Hannah R. Coffin
Comparing The Effects Of Monensin And Sodium Butyrate On Coccidia In Post-Weaned Heifers, Hannah R. Coffin
Honors Theses and Capstones
The emergence of antibiotic resistances has raised concerns in society about the widespread use of antibiotics, such as monensin, as growth enhancers in agriculture. Pressure to find alternatives has increased since the European Union banned the use of ionophorous antibiotics. Butyrate supplementation has been found to enhance growth in pre-weaned calves and it has been recently suggested to enhance growth in post-weaned heifers. In a recent study by Rice in 2017, there was a quadratic (P=0.03) response for coccidia counts as sodium butyrate was increased, with the lowest counts being at the intermediate doses. This suggested that butyrate has the …
Effect Of Direct-Fed Microbials And Enzyme Supplementation In Prepartum Holstein Cows On Colostrum And Calf Immunity, Erin M. Shangraw
Effect Of Direct-Fed Microbials And Enzyme Supplementation In Prepartum Holstein Cows On Colostrum And Calf Immunity, Erin M. Shangraw
Honors Theses and Capstones
In cows, colostrum is composed of several antibodies and nutrients to provide immunity and energy to the calf. Feeding calves high quality colostrum has been shown to improve calf health, leading to reduced mortality in calves and greater milk production in cows. The addition of direct-fed microbials (DFM) to cow diets has been theorized to improve feed efficiency and milk production, with studies showing mixed results. However, few experiments have studied the effect of feeding DFM on colostrum quality. In this experiment two treatments were given, 1) DFM and 2) DFM and enzymes (DFME). Colostrum was …
Estimating Plasma Volume In Neonatal Holstein Calves Fed One Or Two Feedings Of A Lacteal-Based Colostrum Replacer Using Evans Blue Dye And Hematocrit Values At Various Time Points., Peter S. Erickson, Rosemarie G. Cabral Ph.D., Colleen E. Chapman Ms, E. J. Kent
Estimating Plasma Volume In Neonatal Holstein Calves Fed One Or Two Feedings Of A Lacteal-Based Colostrum Replacer Using Evans Blue Dye And Hematocrit Values At Various Time Points., Peter S. Erickson, Rosemarie G. Cabral Ph.D., Colleen E. Chapman Ms, E. J. Kent
Biological Sciences
Twenty-eight Holstein calves were blocked by birth date and randomly assigned to one of two treatments to investigate the effect of colostrum replacer (CR) feeding regimen on plasma volume (PV). Treatments were: 1) one feeding of CR (C1; 3L of reconstituted CR 675 g of powder providing 184.5 g of IgG at birth) or 2) two feedings of CR (C2; 2L of reconstituted CR at birth and 1 L of reconstituted CR at six h). By 6 h of age, all calves had received 3L of CR providing 184.5 g …
Evaluating Colostrum Quality With Niacin Supplementation In The Diet Of Dairy Cattle, Allison Marie Pike
Evaluating Colostrum Quality With Niacin Supplementation In The Diet Of Dairy Cattle, Allison Marie Pike
Student Research Projects
Dairy calves are born with a naive immune system, and must obtain passive immunity through ingestion of colostrum. Colostrum provides the newborn with antimicrobial proteins called immunoglobulins, such as immunoglobulin G (IgG), that protect the calf for the first few weeks of life. Calves that receive good quality colostrum (>50 g/L of IgG) are more likely to survive to adulthood. Niacin is a vasodilator that may increase blood flow to the mammary gland during production of colostrum in the mother. This experiment investigated the effect of niacin supplementation at a rate of 48 g/cow/day for 3 weeks before calving …
How Does Moo-Ving To Pasture Feeding Affect The Nutrient Composition Of Cows' Blood And Milk?, Jillian Smith
How Does Moo-Ving To Pasture Feeding Affect The Nutrient Composition Of Cows' Blood And Milk?, Jillian Smith
Inquiry Journal 2013
No abstract provided.
Biosecurity Risk Assessment Of The Fairchild Dairy Nutrition Research Center, Margaret Lynch
Biosecurity Risk Assessment Of The Fairchild Dairy Nutrition Research Center, Margaret Lynch
Honors Theses and Capstones
No abstract provided.
Variations In Carotenoids In Plasma From Jersey Cows At An Organic Dairy Compared To A Conventional Dairy Over Time, Jillian M. Smith
Variations In Carotenoids In Plasma From Jersey Cows At An Organic Dairy Compared To A Conventional Dairy Over Time, Jillian M. Smith
Honors Theses and Capstones
Interest in organic milk is increasing. By USDA Certified Organic standards, animals must be fed on pasture for a minimum of 120 days. Research indicates that various factors such as diet impact the nutritional quality and composition of milk. The objective of this study was to understand how feeding practices affected bovine plasma carotenoid concentrations over time. Plasma samples were collected from 9 cows fed on pasture at an organic dairy and from 9 cows fed total mixed ration (TMR) at a conventional dairy. Components were extracted from the plasma and separated via High Performance Liquid Chromatography. Results showed that …
Effects Of Incremental Dietary Levels Of Ground Flaxseed On Milk Production, Ruminal Metabolism, And Enteric Methane Emissions In Organic Dairy Cows, Katie Velez
Honors Theses and Capstones
Ground Flaxseed (Linum uitatissimum) is a lipid supplement that is commonly fed to dairy cows. It is believed that supplemental lipid can change the Fatty Acid (FA) composition in the milk, and decrease methane production. Twenty lactating organic Jersey cows, housed at the UNH Organic Dairy Research Farm (ODRF), were randomly assigned to five replicated 4 × 4 Latin squares to investigate the effects of increasing dietary levels of ground flaxseed (0, 5, 10, or 15% of the diet dry matter) on animal fperformance (e.g., dry matter intake, milk production, milk composition), ruminal metabolism, and enteric methane emissions. Each …
Got Controversy - Milk Does, Margaret Sova Mccabe
Got Controversy - Milk Does, Margaret Sova Mccabe
Law Faculty Scholarship
This article analyzes ongoing controversy over how to best label rBST-free milk. Recombinant bovine somatotropin is a genetically engineered drug administered by some farmers to their dairy herds to increase milk production. FDA first approved its use in 1994, despite great controversy. The FDA also issued labeling guidelines that allowed voluntary disclosure of rBST-free milk, so long as it carried the disclaimer that no difference could be detected between milk produced with rBST and rBST-free. The controversy continues today as consumers express a preference for rBST-free milk and many rBST-free producers label their milk this way. "Conventional" milk (with rBST) …
Handling Large Farm Animals, Andrew B. Conroy, Laurie Chapman-Bosco, Dwight Barney
Handling Large Farm Animals, Andrew B. Conroy, Laurie Chapman-Bosco, Dwight Barney
Faculty Publications
Livestock Handling Techniques for 4-H Youth