Aggregation, Particulate Organic Matter and Its Soil Carbon Distribution of the Wetland Soil in Liaohe Delta

doi:10.11924/j.issn.1000-6850.2014-1208

Abstract

Abstract: This study investigated the distribution characteristics of soil aggregates and particulate organic matter, soil carbon concentration of three typical wetlands in Liaohe River Delta. By wet sieving and density grouping, we get the percentage of different aggregate fractions and in-particulate organic matter (iPOM), physical and chemical parameters, organic C, total nitrogen (N). The results showed that silt- and clay-sized fraction(＜53μm) took priority in the percentage aggregation of different wetlands, followed by microaggregates(53-250μm). Still, the organic C concentration was mainly macroaggregates (＞250μm). Moreover, mineral soil organic C accounted for the most in particulate organic matter (>90%), while its C concentration was the lowest. Generally, in-particulate organic matter (iPOM) was much more than aggregate, and the organic C concentration increases with the fraction increasing. Also, light free (LF) had the highest organic C content, ranging from 174.4 to 182.0 g/kg. Particularly, the organic C concentration of fine particulate organic matter in fine aggregate was the highest in Suaeda salsa wetland. In conclusion, the reed wetland has the best capacity of carbon sequestration as a result of its largest quantity of macroaggregate and highest stability.

叶思源, 丁玉荣, 赵全升, 丁喜桂, 袁红明, 赵广明 and 王锦. Aggregation, Particulate Organic Matter and Its Soil Carbon Distribution of
the Wetland Soil in Liaohe Delta[J]. Chinese Agricultural Science Bulletin, 2014, 30(34): 171-177.

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Aggregation, Particulate Organic Matter and Its Soil Carbon Distribution of
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