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首页> 外文期刊>Environmental Science & Technology >Interactive Priming of Biochar and Labile Organic Matter Mineralization in a Smectite-Rich Soil
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Interactive Priming of Biochar and Labile Organic Matter Mineralization in a Smectite-Rich Soil

机译：富含蒙脱石的土壤中生物炭和不稳定有机物矿化的相互作用引发

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摘要

Biochar is considered as an attractive tool for long-term carbon (C) storage in soil. However, there is limited knowledge about the effect of labile organic matter (LOM) on biochar-C mineralization in soil or the vice versa. An incubation experiment (20 °C) was conducted for 120 days to quantify the interactive priming effects of biochar-C and LOM-C mineralization in a smectttic clayey soil. Sugar cane residue (source of LOM) at a rate of 0, 1, 2, and 4% (w/w) in combination with two wood biochars (450 and SSO °C) at a rate of 2% (w/w) were applied to the soil. The use of biochars (~ -36%>) and LOM (-12.7%>) or soil (-143%o) with isotopically distinct δ13C values allowed the quantification of C mineralized from biochar and LOM/soil. A small fraction (0.4-1.1%) of the applied biochar-C was mineralized, and the mineralization of biochar-C increased significantly with increasing application rates of LOM, especially during the early stages of incubation. Concurrently, biochar application reduced the mineralization of LOM-C, and the magnitude of this effect increased with increasing rate of LOM addition. Over time, the interactive priming of biochar-C and LOM-C mineralization was stabilized. Biochar application possesses a considerable merit for long-term soil C-sequestration, and it has a stabilizing effect on LOM in soil.
机译：生物炭被认为是在土壤中长期储存碳（C）的有吸引力的工具。但是，关于不稳定有机物（LOM）对土壤中生物碳C矿化的影响的认识有限，反之亦然。进行了120天的孵化实验（120°C），以量化在黑黏土中biochar-C和LOM-C矿化作用的交互作用。甘蔗残渣（LOM的来源）的比率为0、1、2和4％（w / w），与两种木炭（450和SSO°C）的比率为2％（w / w）施用到土壤上。使用具有同位素不同的δ13C值的生物炭（〜-36％）和LOM（-12.7％>）或土壤（-143％o）可以量化从生物炭和LOM /土壤矿化的C。施用的生物炭C中有一小部分（0.4-1.1％）被矿化，并且随着LOM施用率的增加，生物炭C的矿化显着增加，尤其是在孵育的早期。同时，生物炭的施用减少了LOM-C的矿化作用，并且随着LOM添加速率的增加，这种作用的程度也随之增加。随着时间的流逝，biochar-C和LOM-C矿化的互动引发作用得以稳定。生物炭的应用具有长期固碳的优点，并且对土壤中的LOM具有稳定作用。

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  • 来源
    《Environmental Science & Technology》 |2011年第22期|p.9611-9618|共8页
  • 作者

    Alexandra Keith; Balwant Singh; Bhupinder Pal Singh;

  • 作者单位

    Faculty of Agriculture, Food, and Natural Resources, The University of Sydney, NSW, 2006, Australia;

    Faculty of Agriculture, Food, and Natural Resources, The University of Sydney, NSW, 2006, Australia;

    NSW Department of Primary Industries, P.O. Box 100, Beecroft, NSW 2119, Australia;

  • 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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  • 正文语种 eng
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