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

Hernandez-Soriano, Maria C., Kerre, Bart, Kopittke, Peter M., Horemans, Benjamin and Smolders, Erik (2016) Biochar affects carbon composition and stability in soil: a combined spectroscopy-microscopy study. Scientific Reports, 6 25127: 1-13. doi:10.1038/srep25127


Author Hernandez-Soriano, Maria C.
Kerre, Bart
Kopittke, Peter M.
Horemans, Benjamin
Smolders, Erik
Title Biochar affects carbon composition and stability in soil: a combined spectroscopy-microscopy study
Journal name Scientific Reports   Check publisher's open access policy
ISSN 2045-2322
Publication date 2016-04-26
Year available 2016
Sub-type Article (original research)
DOI 10.1038/srep25127
Open Access Status DOI
Volume 6
Issue 25127
Start page 1
End page 13
Total pages 13
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Collection year 2017
Language eng
Abstract The use of biochar can contribute to carbon (C) storage in soil. Upon addition of biochar, there is a spatial reorganization of C within soil particles, but the mechanisms remain unclear. Here, we used Fourier transformed infrared-microscopy and confocal laser scanning microscopy to examine this reorganization. A silty-loam soil was amended with three different organic residues and with the biochar produced from these residues and incubated for 237 d. Soil respiration was lower in biochar-amended soils than in residue-amended soils. Fluorescence analysis of the dissolved organic matter revealed that biochar application increased a humic-like fluorescent component, likely associated with biochar-C in solution. The combined spectroscopy-microscopy approach revealed the accumulation of aromatic-C in discrete spots in the solid-phase of microaggregates and its co-localization with clay minerals for soil amended with raw residue or biochar.The co-localization of aromatic-C:polysaccharides-C was consistently reduced upon biochar application. We conclude that reduced C metabolism is an important mechanism for C stabilization in biochar-amended soils.
Keyword Biochar
Infrared spectroscopy
Microscopy
Soil organic carbon
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Agriculture and Food Sciences
 
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Created: Wed, 27 Apr 2016, 00:20:36 EST by Maria Hernandez-soriano on behalf of School of Agriculture and Food Sciences