کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1744848 1522171 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Uncertainties in life cycle greenhouse gas emissions from U.S. beef cattle
ترجمه فارسی عنوان
عدم اطمینان در چرخه حیات گاوهای گلخانه ای از گاو گوشت گاو ایالات متحده
کلمات کلیدی
گاو گوشت گاو، انتشار گازهای گلخانه ای، کربن خاک، تغییر کاربری زمین، چرخه زندگی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی


• Life cycle emissions from beef cattle can vary dramatically with factors identified.
• Feeding of ethanol coproducts reduces life cycle emissions by 1.7% on average.
• Monte Carlo simulation found average life cycle emissions of 8.14 kg CO2 per kg.
• Methods of the U.S. EPA account for only 3–20% of life cycle GHG emissions.

Beef cattle feedlots are estimated to contribute 26% of U.S. agricultural greenhouse gas (GHG) emissions, and future climate change policy could target reducing these emissions. Life cycle assessment (LCA) of GHG emissions from U.S. grain-fed beef cattle was conducted based on industry statistics and previous studies to identify the main sources of uncertainty in these estimations. Uncertainty associated with GHG emissions from indirect land use change, pasture soil emissions (e.g. soil carbon sequestration), enteric fermentation from cattle on pasture, and methane emissions from feedlot manure, respectively, contributed the most variability to life cycle GHG emissions from beef production. Feeding of coproducts from ethanol production was estimated to reduce life cycle emissions by 1.7%, but could increase emissions by 0.6–2.0% with higher feeding rates. Monte Carlo simulation found a range of life cycle emissions from 2.52 to 9.58 kg CO2 per kg live weight (5th and 95th percentiles), with a calculated average of 8.14, which is between recent estimates. Current methods used by the U.S. Environmental Protection Agency (EPA) associated with beef production in feedlots were found to account for only 3–20% of life cycle GHG emissions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cleaner Production - Volume 75, 15 July 2014, Pages 31–39
نویسندگان
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