Abstract
Recently environmental impact caused by livestock receives increasing attention. The objective of this study is to estimate the environmental impact of dairy cow in Korea by life cycle assessment (LCA). System boundary is cradle-to-gate from feedstuff production to farm gate. Functional unit is producing 9,000kg of milk and referece flow is one dairy cow. Environmental impact categories considered include global warming, acidification, ozone layer depletion, abiotic resource depletion, photochemicaloxidant creation, eutrophication, eco-toxicity and human toxicity. Four impact categories were identified significant. They are acidification, eco-toxicity, eutrophication and global warming. Manure management affect significantly on acidification, eco-toxicity and eutrophication, while enteric fermentation dominated by CH4 emission affect global warming.
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