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首页> 外文期刊>Bioenergy research >Modelling Soil Organic Carbon Changes Under Different Maize Cropping Scenarios for Cellulosic Ethanol in Europe
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Modelling Soil Organic Carbon Changes Under Different Maize Cropping Scenarios for Cellulosic Ethanol in Europe

机译：欧洲纤维素乙醇在不同玉米种植情景下土壤有机碳变化的模拟

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摘要

The utilization of crop residues in the production of second-generation biofuels has the potential to boost the bioenergy sector without affecting food commodity prices. However, policies leading to large-scale biomass removal should carefully balance the consequences, both environmental and in terms of emissions, on soil organic carbon (SOC) stocks depletion. Using a recently developed simulation platform, SOC changes were estimated at European level (EU + candidate and potential candidate countries) under two scenarios of low (R30) and high (R90) maize stover removal for cellulosic ethanol production (i.e. 30 and 90聽% of stover removal, respectively). Additionally, mitigation practices for SOC preservation, namely the introduction of a ryegrass cover crop (R90_C) and biodigestate return to soil (R90_B), were explored under the highest rate of stover removal. The results showed that 15.3 to 50.6聽Mt聽year鈭? of stover (dry matter) would be potentially available for ethanol production under the lower and high removal rates considered. However, large-scale exploitation of maize residues will lead to a SOC depletion corresponding to 39.7鈥?35.4聽Mt CO2 eq. by 2020 (under R30 and R90, respectively) with greater losses in the long term. In particular, every tonne of C residue converted to bioethanol was predicted to have an additional impact on SOC loss almost ranging from 0.2 to 0.5聽CO2 eq.鈥塰a鈭?聽year鈭?, considering a continuous biofuel scenario by 2050. The mitigation practices evaluated could more than halve SOC losses compared to R90, but not totally offsetting the negative soil C balance. There is a pressing need to design policies at EU level for optimum maize biofuel cultivations that will preserve the current SOC stock or even generate C credits.
机译：在第二代生物燃料生产中利用农作物残余物有潜力在不影响粮食商品价格的情况下促进生物能源领域的发展。但是，导致大规模清除生物质的政策应谨慎平衡环境和排放方面对土壤有机碳（SOC）库消耗的影响。使用最新开发的模拟平台，在为纤维素乙醇生产而进行的低（R30）和高（R90）玉米秸秆去除的两种情况下，估计了欧洲水平（欧盟+候选国和潜在候选国）的SOC变化（即30％和90％）拆除灶具）。此外，在秸秆去除率最高的情况下，探索了SOC保护的缓解措施，即引入黑麦草覆盖作物（R90_C）和生物消化物返回土壤（R90_B）。结果表明，从15.3年到50.6年是多少？在所考虑的较低和较高去除率下，秸秆（干物质）的百分含量可能会用于乙醇生产。但是，对玉米残留物的大规模开采将导致SOC损耗，相当于39.7〜35.4 Mt CO2当量。到2020年（分别低于R30和R90），长期而言损失更大。特别是，考虑到2050年持续的生物燃料情景，预计每吨转化为生物乙醇的C残留物会对SOC损失造成额外影响，几乎从0.2至0.5二氧化碳当量/年。与R90相比，所评估的缓解措施可以使SOC损失减少一半以上，但不能完全抵消土壤C负平衡。迫切需要在欧盟一级设计政策，以优化玉米生物燃料的种植，以保留当前的SOC存量，甚至产生碳信用额。

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  • 来源
    《Bioenergy research》 |2015年第2期|537-545|共9页
  • 作者

    E. Lugato; A. Jones;

  • 作者单位

    1.European Commission Joint Research Centre Institute for Environment and Sustainability Via E. Fermi 2749 21027 Ispra VA Italy;

    1.European Commission Joint Research Centre Institute for Environment and Sustainability Via E. Fermi 2749 21027 Ispra VA Italy;

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  • 正文语种 eng
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  • 关键词

    Soil organic carbon Maize stover Biofuel Crop residues Modelling;

    机译：土壤有机碳玉米秸秆生物燃料作物残渣模拟;

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