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SOC dynamics assessments require temporal chemical fractionation of SOM constituents. Our fractionation assesses the SOM status after 12 years of wetland function. This fractionation provides knowledge of the potential of this system to sequester carbon in stable forms. The organic matter fractionation of the 4 cm detritus layer is illustrated in Table 4.

Table 4

Carbon fractionation in detritus layer of wetland marsh areas

FractionsCarbon content (mg kg−1)
CW 414.74 (40.47) 
HW 2,554.01 (770.46) 
HCl 1,143.85 (290.04) 
Na4P2O4 5,364.43 (487.80) 
NaOH 37.22 (33.66) 
Humin 65,101.03 (17,622.55) 
FractionsCarbon content (mg kg−1)
CW 414.74 (40.47) 
HW 2,554.01 (770.46) 
HCl 1,143.85 (290.04) 
Na4P2O4 5,364.43 (487.80) 
NaOH 37.22 (33.66) 
Humin 65,101.03 (17,622.55) 

*Numbers in parentheses are standard errors.

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