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- W2391172810 abstract "Four typical samples of forest soil profiles were collected in the middle of Guizhou Province.The processes of source,transport and transformation of soil organic carbon(SOC) and dissolved organic carbon(DOC) were discussed through analyzing the ratios of δ~(13)C_(SOC),δ~(13)C_(DOC) and δ~(13)C of litter.The results indicate that the()~(13)C was enriched and the δ~(13)C_(SOC) increased by 0.1%——0.3% during litter degrading to SOC in surface soil.The litter-rich surface soil had high content of DOC and the δ~(13)C_(DOC) was similar to δ~(13)C of litter.The litter-lack surface soil had low content of DOC,and the δ~(13)C_(DOC) was different from δ~(13)C_(SOC).It suggests that DOC derives from litter in the litter-rich surface soil.In some mature soil profiles,δ~(13)C_(SOC) and δ~(13)C_(DOC) have a positive trend with the increase of soil depth.The degradation degree of SOC was more thoroughly with the increase of soil depth.The variation trend of δ~(13)C_(SOC) and δ~(13)C_(DOC) in soil profiles and the absolute values of(Δ(δ~(13)C_(DOC)(——)δ~(13)C_(SOC))) decreased with the increase of soil depth.The ratio of DOC from degradation of humus to the amount of DOC was on the increase with soil depth.In the premature soil profiles,the variation of δ~(13)C_(SOC) reflects the mixture of young and old SOC." @default.
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- W2391172810 date "2008-01-01" @default.
- W2391172810 modified "2023-09-25" @default.
- W2391172810 title "Discussing variance of forest soil organic carbon by analysis of δ~(13)C" @default.
- W2391172810 hasPublicationYear "2008" @default.
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