Opening the black box: Soil microcosm experiments reveal soot black carbon short-term oxidation and influence on soil organic carbon mineralisation.
Opening the black box: Soil microcosm experiments reveal soot black carbon short-term oxidation and influence on soil organic carbon mineralisation.
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打开黑匣子：土壤微观实验揭示烟灰黑碳短期氧化及其对土壤有机碳矿化的影响。
DOI：
10.1016/j.scitotenv.2021.149659
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Crispo M
中科院分区：
文献类型：
--
作者：
Crispo M
土壤拥有陆地生态系统总有机碳储量的四分之三，但我们从根本上缺乏对主要土壤有机碳库周转的详细机制了解。黑碳是化石燃料和生物质不完全燃烧的产物，广泛存在于全球土壤中。虽然BC是一个主要的土壤碳库，但它对全球碳循环的影响尚未得到解决。土壤BC代表着一个在地质时间尺度上翻转的大型稳定碳库，但研究表明，它可以改变土壤的生物地球化学循环，包括土壤有机碳的循环。在这里，我们建立了两个土壤微观世界实验：实验一在土壤中添加13C OC，以研究在添加BC(烟尘或生物炭)的情况下是否抑制OC的矿化；实验二向土壤中添加13C BC(烟尘)，以确定其在短时间内是否在土壤中矿化。在六个月的时间里对气体进行采样，并使用同位素比质谱仪进行分析。在实验一中，我们发现土壤中~(13)C-OC的流出量随着时间的推移而减少，但向土壤中添加烟尘显著地减少了有机碳的矿化，从不添加烟尘的总供应量的32%下降到总供应量的14%。相比之下，添加生物炭后，向土壤中添加有机碳的13C通量没有显著差异。在实验二中，我们发现添加13C烟尘的土壤的13C流出量与对照有显著差异，但这种流出量随着时间的推移而下降。在实验过程中，烟尘累积损失了0.17%~(13)C。这些实验结果代表了人们对BC连续体对碳动力学影响的认识上的一步变化，这对我们未来监测和管理土壤固碳的方式具有重要意义。
Soils hold three quarters of the total organic carbon (OC) stock in terrestrial ecosystems and yet we fundamentally lack detailed mechanistic understanding of the turnover of major soil OC pools. Black carbon (BC), the product of the incomplete combustion of fossil fuels and biomass, is ubiquitous in soils globally. Although BC is a major soil carbon pool, its effects on the global carbon cycle have not yet been resolved. Soil BC represents a large stable carbon pool turning over on geological timescales, but research suggests it can alter soil biogeochemical cycling including that of soil OC. Here, we established two soil microcosm experiments: experiment one added13C OC to soil with and without added BC (soot or biochar) to investigate whether it suppresses OC mineralisation; experiment two added13C BC (soot) to soil to establish whether it is mineralised in soil over a short timescale. Gases were sampled over six-months and analysed using isotope ratio mass spectrometry. In experiment one we found that the efflux of13C OC from soil decreased over time, but the addition of soot to soil significantly reduced the mineralisation of OC from 32% of the total supplied without soot to 14% of the total supplied with soot. In contrast, there was not a significant difference after the addition of biochar in the flux of13C from the OC added to the soil. In experiment two, we found that the efflux13C from soil with added13C soot significantly differed from the control, but this efflux declined over time. There was a cumulative loss of 0.17%13C from soot over the experiment. These experimental results represent a step-change in understanding the influence of BC continuum on carbon dynamics, which has major consequences for the way we monitor and manage soils for carbon sequestration in future.
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影响因子：
9.7
作者：
Girkin, N. T.;Turner, B. L.;Sjogersten, S.
通讯作者：
Sjogersten, S.
影响因子：
6.1
作者：
J. Lavallee;R. Conant;M. Haddix;R. Follett;M. Bird;E. Paul
通讯作者：
J. Lavallee;R. Conant;M. Haddix;R. Follett;M. Bird;E. Paul
(2001)
DOI：
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发表时间：
--
期刊：
影响因子：
--
作者：
通讯作者：
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影响因子：
2.7
作者：
Ascough, P. L.;Bird, M. I.;Vane, C. H.
通讯作者：
Vane, C. H.
影响因子：
11.4
作者：
Edmondson, Jill L.;Stott, Iain;Leake, Jonathan R.
通讯作者：
Leake, Jonathan R.