Biochar affects carbon composition and stability in soil: a combined spectroscopy-microscopy study
| Autor: | Benjamin Horemans, Bart Kerré, Peter M. Kopittke, Erik Smolders, Maria C. Hernandez-Soriano |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
010501 environmental sciences
01 natural sciences complex mixtures Article Soil respiration Soil Dissolved organic carbon Biochar Spectroscopy Fourier Transform Infrared Organic Chemicals Charcoal 0105 earth and related environmental sciences Multidisciplinary Microscopy Confocal Chemistry Soil organic matter Soil chemistry 04 agricultural and veterinary sciences Soil carbon Carbon Agronomy Environmental chemistry visual_art Soil water 040103 agronomy & agriculture visual_art.visual_art_medium 0401 agriculture forestry and fisheries |
| Zdroj: | Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | 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. ispartof: Scientific Reports vol:6 issue:1 ispartof: location:England status: published |
| Databáze: | OpenAIRE |
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