Global ETD Search
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 11 of 11 for “"enteric methane"”.
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Enteric methane emissions mitigation in U.S. beef production: industry adoption, public perception, and potential market impacts
Chapter 1 Cattle are ruminant livestock that emit enteric methane (CH₄) as part of their natural digestive process. The U.S. beef cattle industry is receiving pressure to reduce greenhouse gases emissions, including methane. The U.S. Roundtable for Sustainable Beef has set a target for the U.S. …
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Evaluation of Swath Grazing Simple and Complex Polycrop Mixtures on Forage Biomass and Quality, Beef Cow Performance and Enteric Methane Emissions, System Economics and Soil Health Characteristics
… and quality, beef cow performance and intake, methane emissions, soil characteristics and system economics. Forage treatments included (1) CDC Haymaker oat (Avena sativa) (Control); (2) CDC Haymaker oat, Goliath brassica (Brassica napus), hairy vetch (Vicia villosa), CDC Jasper pea (Pisum …
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Microbial Regulation of Soil Greenhouse Gas Emissions in a Non-Bloat Legume Grazing System
… of greenhouse gas (GHG) emissions, including enteric methane from ruminating cattle, carbon dioxide (CO2), and nitrous oxide (N2O) from microbial respiration of soil carbon (C) and nitrogen (N). Producers may introduce non-bloat legumes to cattle pastures to improve soil N content, increase …
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Effects of Annual and Perennial Forage Systems on Forage Biomass and Quality, Grazing Animal Performance and Enteric Emissions, and System Economics
… grazing animal performance, rumen fermentation, enteric methane production, and system economics. Forage systems included (1) CDC Austenson barley (Hordeum vulgare L.) + 4010 pea (Pisum sativum L.) + Winfred forage brassica (Brassica oleracea L.× Brassica rapa L.) + Gorilla forage brassica …
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Assessment of methane emission traits in Canadian Holstein cows
Enteric methane production from ruminants represents a loss of productive energy and contributes to greenhouse gas emissions. This thesis presents a phenotypic data description and genetic parameter estimates of three methane emission traits (methane production, yield, and intensity) in Canadian …
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Environmental Impact of Pasture-Based Milk Production in Integrated Crop-Livestock Systems
… Christian Albrecht University Kiel, focusing on enteric methane (CH₄) emissions, carbon (C) dynamics, and nitrogen (N) losses. The first objective assessed enteric CH₄ emissions from pasture-based Jersey dairy cows using eddy covariance (EC), feed intake, and milk yield data across four grazing …
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Life cycle environmental impacts of utilizing hemp seed meal as a protein source in sheep feedlot rations
… The use of IPCC Tier 2 methods for estimating enteric methane emissions from sheep resulted in a 7.5–8.5% increase in the carbon footprint, relative to a mechanistic equation present in the Ruminant Nutrition System model. Physical allocation resulted in greater impacts of the hemp diet systems …
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METHANE MITIGATION, FEED EFFICIENCY, AND HEAT STRESSIN REPLACEMENT HEIFERS: NUTRITIONAL ANDMANAGEMENT APPROACHES FOR SUSTAINABLE DAIRYPRODUCTION
… focused on improving feed efficiency, mitigating methane emissions, and alleviating the detrimental effects of heat stress in Italian Holstein dairy heifers. The first study (Chapter 3) describes an in vivo trial evaluating the inclusion of increasing doses of lysozyme in the diet of dairy heifers …
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Modelling New Zealand dairy farm systems to design greenhouse gas mitigation strategies
… denitrification and also by increasing enteric methane emissions as more fibrous feed is available to be consumed. The mean profit reduction was 6.9% and 4.9% for the Waikato and Canterbury regions, respectively. The Canterbury medium-input system had a lower cost of mitigation than the …
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The Relationships Between the Ruminal Digestibility Kinetics of Fiber, Total-Tract Nutrient Digestibility, and Methane Emissions from Lactating Dairy Cattle
… minimizing environmental impacts, particularly enteric methane (CH4) emissions. Ruminal degradation and passage kinetics of fiber fractions, potentially degradable (pdNDF) and undegraded (uNDF) neutral detergent fiber (NDF), are influenced by both forage quality and dietary composition. This …