<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Qi F</dc:creator>
  <dc:creator>Naidu R</dc:creator>
  <dc:creator>Bolan NS</dc:creator>
  <dc:creator>Dong Z</dc:creator>
  <dc:creator>Yan Y</dc:creator>
  <dc:creator>Lamb D</dc:creator>
  <dc:creator>Bucheli TD</dc:creator>
  <dc:creator>Choppala G</dc:creator>
  <dc:creator>Duan L</dc:creator>
  <dc:creator>Semple KT</dc:creator>
  <dc:date>2017</dc:date>
  <dc:description xmlns:ns0="xml" ns0:lang="en">Pyrogenic carbon (PyC), the combustion residues of fossil fuel and biomass, is a versatile soil fraction active in biogeochemical processes. In this study, the chemo-thermal oxidation method (CTO-375) was applied to investigate the content and distribution of PyC in 30 Australian agricultural, pastoral, bushland and parkland soil with various soil types. Soils were sampled incrementally to 50cm in 6 locations and at another 7 locations at 0-10cm. Results showed that PyC in Australian soils typically ranged from 0.27-5.62mg/g, with three Dermosol soils ranging within 2.58-5.62mg/g. Soil PyC contributed 2.0-11% (N=29) to the total organic carbon (TOC), with one Ferrosol as high as 26%. PyC was concentrated either in the top (0-10cm) or bottom (30-50cm) soil layers, with the highest PyC:TOC ratio in the bottom (30-50cm) soil horizon in all soils. Principal component analysis - multiple linear regression (PCA-MLR) suggested the silt-associated organic C factor accounted for 38.5% of the variation in PyC. Our findings suggest that PyC is an important fraction of the TOC (2.0-11%, N=18) and chemically recalcitrant organic C (ROC) obtained by chemical C fractionation method accounts for a significant proportion of soil TOC (47.3-84.9%, N=18). This is the first study comparing these two methods, and it indicates both CTO-375 and C speciation methods can determine a fraction of recalcitrant organic C. However, estimated chemically recalcitrant organic carbon pool (ROC) was approximately an order of magnitude greater than that of thermally stable organic carbon (PyC).</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>https://sonar.ch/global/documents/189921</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2017.02.064</dc:relation>
  <dc:relation>info:eu-repo/semantics/altIdentifier/pmid/28215804</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:source>The Science of the total environment. - 2017</dc:source>
  <dc:subject xmlns:ns1="xml" ns1:lang="en">Content</dc:subject>
  <dc:subject xmlns:ns2="xml" ns2:lang="en">Distribution</dc:subject>
  <dc:subject xmlns:ns3="xml" ns3:lang="en">Pyrogenic carbon (PyC)</dc:subject>
  <dc:subject xmlns:ns4="xml" ns4:lang="en">Soil</dc:subject>
  <dc:subject xmlns:ns5="xml" ns5:lang="en">Soil properties</dc:subject>
  <dc:title xmlns:ns6="xml" ns6:lang="en">Pyrogenic carbon in Australian soils.</dc:title>
  <dc:type>http://purl.org/coar/resource_type/c_6501</dc:type>
</oai_dc:dc>