Biochar affects carbon composition and stability in soil: a combined spectroscopy-microscopy study

作者: Maria C. Hernandez-Soriano , Bart Kerré , Peter M. Kopittke , Benjamin Horemans , Erik Smolders

DOI: 10.1038/SREP25127

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摘要: The use of biochar can contribute to carbon (C) storage in soil. Upon addition biochar, there is a spatial reorganization C within soil particles, but the mechanisms remain unclear. Here, we used Fourier transformed infrared-microscopy and confocal laser scanning microscopy examine this reorganization. A silty-loam was amended with three different organic residues produced from these incubated for 237 d. Soil respiration lower biochar-amended soils than residue-amended soils. Fluorescence analysis dissolved matter revealed that application increased humic-like fluorescent component, likely associated biochar-C solution. combined spectroscopy-microscopy approach accumulation aromatic-C discrete spots solid-phase microaggregates its co-localization clay minerals raw residue or biochar.The aromatic-C:polysaccharides-C consistently reduced upon application. We conclude metabolism an important mechanism stabilization

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