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Showing 1 to 20 of 37 for “"feedlot cattle"”.
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Experimental investigation of biogas production from feedlot cattle manure
… study is focused on the biogas generation from cattle manure. The manure was analysed for weight loss over 40 days and the energy content determined. The biogas volume produced was measured as a function of time until there was no measurable gas formation after 41 days. The biogas was analysed …
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Modeling nutrient requirements and measuring nutrient outputs of feedlot cattle
… predict the requirements of modern, heavy cattle based on historic data has not been explored. A dataset derived from 19 studies containing 289 means for treatments testing ractopamine during the final 14 to 42 days of finishing was subjected to a meta-analysis to develop a regression …
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The relationship between mitochondria and residual feed intake in feedlot cattle
… that a similar relationship existed in cattle. Steers were selected to have high or low RFI, the animals were scarified, and mitochondria were isolated from skeletal muscle. Low RFI steers had greater rates of state 2 and 3 respiration and produced more hydrogen peroxide. A blood assay …
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EFFECTS OF DIETARY COMPOSITION AND FEEDING MANAGEMENT REGIMEN ON FEEDLOT CATTLE PERFORMANCE
… prevalence, and metabolic health in finishing feedlot steers. In a randomized complete block design, crossbred beef steers (n = 720) were assigned to 48 pens that housed 15 steers per pen. Treatments were arranged in a 2 × 2 factorial with the factors being diet and feeding management. Diets …
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Nutritional Factors Associated With the Development of Abscessed Livers in Feedlot Cattle
Made available in DSpace on 2014-12-13T19:42:42Z (GMT). No. of bitstreams: 1 7726727.pdf: 5897155 bytes, checksum: ab5118e797cfb913cacb9118127a9157 (MD5) Previous issue date: 1977
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Effect of Nutrition and Management on Marbling Deposition, Carcass Value, and Profitability in Feedlot Cattle
Three feedlot experiments were conducted to examine the effect of dietary vitamin A on carcass quality and serum retinol (ROL) in cattle. Diets were calculated to contain 2300 (LVA) or 7250 IU/kg (HVA). No treatment differences existed for MS across all trials. Serum ROL was greater among calf-fed …
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Effects of Nutrition and Management on Feed Efficiency, Carcass Value, and Profitability in Feedlot Cattle
Four-hundred seven head of steers from known sires (n=28) were used to evaluate the influence of sire, diet, and body composition on feed efficiency and profitability. Diet digestibility was higher for corn based finishing diets and lower for diets containing wet corn gluten feed (WCGF). Average …
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The effects of dosing feedlot cattle with Megasphaera elsdenii strain NCIMB 41125 prior to the introduction of a grain-rich diet
… strain NCIMB 41125. Prior to inoculation, cattle were placed into individual pens in an enclosed facility and allowed free access to alfalfa hay, salt, and water. Feed and water were removed for 24 h prior to administering treatments, after which, cattle were allowed free access to a diet …
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Fat content and fatty acid composition of South African Wagyu beef
… done on local Wagyu beef. Diets, feeding and cattle-rearing strategies of Wagyu cattle in South Africa differ from those in Japan. Most Wagyu’s for slaughter are of the F1 generation. This may affect the fat content and fatty acid (FA) composition of South African Wagyu beef. The fat content …
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The effect of tylosin exposure or exclusion on liver abscess prevalence, fecal pathogen populations, and the microflora of finished beef products from feedlot cattle
… in animal production. More than 70% of feedlot cattle in 1000+ head lots are currently exposed to tylosin phosphate, a macrolide antibiotic used for the reduction and prevention of liver abscesses. As such, its potential removal from cattle feeding strategies could have a marked impact …
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Degradable intake protein supplementation through the inclusion of urea in finishing diets containing distillers grains: effects on feedlot cattle performance, ruminal fermentation, and feed digestibility
… high-concentrate, moderate-DG-containing diet on feedlot cattle performance, ruminal fermentation, and feed digestibility. Results from both experiments indicate that due to a DIP deficit generated by the un-supplemented diet, the addition of urea resulted in enhanced ruminal fermentation and feed …
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The potential of antimicrobial resistance diagnostics to inform prudent antimicrobial use in feedlot cattle: dynamic models as tools for optimizing interventions in bovine respiratory disease
… injectable antimicrobial use (AMU) in Canadian feedlots. Global authorities recommend that diagnostic tests should be used to guide therapeutic drug selection in food animals to reduce unnecessary AMU and slow AMR. However, the potential for laboratory testing to inform AMU and favourably impact …
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Agent-based modeling to address emerging threats from antimicrobial resistance to the sustainability of the beef industry
… increased scrutiny of antimicrobial use (AMU) in feedlot cattle. With rising concern for prudent AMU in the beef industry, it is essential to understand the potential impact of eliminating parenteral metaphylaxis on AMR and animal health. Further, the impact of transmission of resistant …
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Evaluating the effect of dietary changes and management strategies to feedlot cattle during the adaptation and finishing phase on performance, carcass characteristics and the rumen microbiome
The primary goal of feedlot cattle nutrition is to provide the most appropriate feeds for cattle to gain body weight efficiently while minimizing cost. Typical strategies utilize diets containing high concentrations of starch to maximize energy intake. An adaptation period is necessary to allow the …
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Ruminal degradation of protein and carbohydrate using a batch culture system, and response to roughage removal, rumen modifier inclusion and postruminal amino acid supply in feedlot cattle
… inclusion and postruminal amino acid supply in feedlot cattle. The objective of the first study was to characterize rumen N, starch, and NDF degradation rate (k[subscript d]), and further calculate ruminal degradable, undegradable and extent of digestion of those nutrients using a batch culture …
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An evaluation of cattle handling categories in the beef quality assurance feedyard assessment, compliance of large feedyards with these guidelines, and influence of handling practices on behavior and performance of feedlot cattle
… management practices were surveyed in commercial feedlots to document compliance of select feedlots with Beef Quality Assurance (BQA) guidelines for cattle handling under the premise that this data warrants inclusion in the National Beef Quality Audit (NBQA). The BQA Feedyard Assessment for cattle …
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