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首页> 外文期刊>Environmental Science & Technology >Life Cycle Assessment to Evaluate the Environmental Impact of Biochar Implementation in Conservation Agriculture in Zambia
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Life Cycle Assessment to Evaluate the Environmental Impact of Biochar Implementation in Conservation Agriculture in Zambia

机译：生命周期评估，以评估赞比亚保护性农业中生物炭实施对环境的影响

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摘要

Biochar amendment to soil is a potential technology for carbon storage and climate change mitigation. It may, in addition, be a valuable soil fertility enhancer for agricultural purposes in sandy and/or weathered soils. A life cycle assessment including ecological, health and resource impacts has been conducted for field sites in Zambia to evaluate the overall impacts of biochar for agricultural use. The life cycle impacts from conservation farming using cultivation growth basins and precision fertilization with and without biochar addition were in the present study compared to conventional agricultural methods. Three different biochar production methods were evaluated: traditional earth-mound kilns, improved retort kilns, and micro top-lit updraft (TLUD) gasifier stoves. The results confirm that the use of biochar in conservation fanning is beneficial for climate change mitigation purposes. However, when including health impacts from particle emissions originating from biochar production, conservation fanning plus biochar from earth-mound kilns generally results in a larger negative effect over the whole life cycle than conservation farming without biochar addition. The use of cleaner technologies such as retort kilns or TLUDs can overcome this problem, mainly because fewer particles and less volatile organic compounds, methane and carbon monoxide are emitted. These results emphasize the need for a holistic view on biochar use in agricultural systems. Of special importance is the biochar production technique which has to be evaluated from both environmental/climate, health and social perspectives.
机译：对土壤进行生物炭改良是一种潜在的碳储存和减缓气候变化技术。另外，它可以是在沙质和/或风化土壤中用于农业目的的有价值的土壤肥力增强剂。已对赞比亚的实地进行了包括生态，健康和资源影响在内的生命周期评估，以评估生物炭对农业用途的总体影响。与传统的农业方法相比，本研究研究了使用栽培生长盆地进行保护性农业以及添加和不添加生物炭的精确施肥对生命周期的影响。对三种不同的生物炭生产方法进行了评估：传统的土窑，改良的t式窑和微型顶吹式（TLUD）气化炉。结果证实，在保护性扇形中使用生物炭有利于缓解气候变化。但是，当包括源自生物炭生产的颗粒物排放对健康的影响时，与在不添加生物炭的情况下进行保护性耕作相比，保护性扇动加上土窑产生的生物炭通常会在整个生命周期中产生更大的负面影响。使用诸如干馏窑或TLUD之类的清洁技术可以克服此问题，这主要是因为排放的颗粒更少，挥发性有机化合物，甲烷和一氧化碳也更少。这些结果强调需要对农业系统中生物炭的使用有一个整体的认识。尤其重要的是生物炭生产技术，必须从环境/气候，健康和社会角度进行评估。

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  • 来源
    《Environmental Science & Technology》 |2013年第3期|1206-1215|共10页
  • 作者

    Magnus Sparrevik; John L. Field; Vegard Martinsen; Gijs D. Breedveld; Gerard Cornelissen;

  • 作者单位

    Norwegian Geotechnical Institute NGI, Oslo, Norway,Department of Industrial Economics and Technology Management, Norwegian University of Technology, 7491 Trondheim, Norway;

    Engines and Energy Conversion Laboratory, Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado, United States;

    Institute for Plant and Environmental Sciences, University of Life Sciences, As, Norway;

    Norwegian Geotechnical Institute NGI, Oslo, Norway,Department of Geosciences, University of Oslo, Oslo, Norway;

    Norwegian Geotechnical Institute NGI, Oslo, Norway,Institute for Plant and Environmental Sciences, University of Life Sciences, As, Norway,Department of Applied Environmental Sciences, Stockholm University, Stockholm, Sweden;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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