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Energy Requirements and Greenhouse Gas Emissions of Maize Production in the USA

机译:美国玉米的能源需求和温室气体排放

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摘要

This meta-study quantitatively and qualitatively compares 21 published life cycle assessment (LCA)-type studies for energy consumption and greenhouse gas (GHG) emissions of maize production in the USA. Differences between the methodologies and numerical results obtained are described. Nonrenewable energy consumption in maize production (from cradle-to-farm gate) ranges from 1.44 to 3.50 MJ/kg of maize, and GHG emissions associated with maize production range from −27 to 436 g CO2 equivalent/kg of maize. Large variations between studies exist within the input data for lime application, fuels purchased, and life cycle inventory data for fertilizer and agrochemical production. Although most studies use similar methodological approaches, major differences between studies include the following: (1) impacts associated with human labor and farm machinery production, (2) changes in carbon dioxide emissions resulting from soil organic carbon levels, and (3) indirect N2O emissions.
机译:这项元研究定量和定性地比较了美国21个已发布的生命周期评估(LCA)类型的玉米生产的能源消耗和温室气体(GHG)排放研究。描述了方法和获得的数值结果之间的差异。玉米生产(从摇篮到农场的大门)的不可再生能源消耗范围为1.44至3.50 MJ / kg玉米,与玉米生产相关的温室气体排放量范围为−27至436 g CO2当量/ kg玉米。不同研究之间存在很大的差异,石灰输入,购买的燃料以及化肥和农药的生命周期库存数据都存在输入数据中。尽管大多数研究使用相似的方法,但研究之间的主要差异包括:(1)与人工和农业机械生产相关的影响;(2)土壤有机碳水平导致的二氧化碳排放量变化;以及(3)间接N2O排放。

著录项

  • 来源
    《Bioenergy research》 |2014年第2期|753-764|共12页
  • 作者单位

    1.DOE Great Lakes Bioenergy Research Center Michigan State University 3815 Technology Boulevard Lansing MI 48910 USA 2.Department of Chemical Engineering and Materials Science Michigan State University 3815 Technology Boulevard Lansing MI 48910 USA;

    1.DOE Great Lakes Bioenergy Research Center Michigan State University 3815 Technology Boulevard Lansing MI 48910 USA 2.Department of Chemical Engineering and Materials Science Michigan State University 3815 Technology Boulevard Lansing MI 48910 USA;

    3.National Corn Growers Association 632 Cepi Drive Chesterfield MO 63005 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Maize Greenhouse gas emissions Life cycle assessment Nonrenewable energy;

    机译:玉米温室气体排放生命周期评估不可再生能源;

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