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选取岛状林(棕壤型草甸白浆土)、小叶章草甸(潜育白浆土)和毛果苔草沼泽湿地(腐殖质沼泽土)研究了三江平原典型环型湿地土壤剖面有机碳分布特征与积累现状。结果表明,从环型沼泽湿地边缘向中心,土壤剖面有机碳含量和有机碳储量变化明显。小叶章草甸剖面土壤有机碳含量高于岛状林,但两者差异不大;毛果苔草沼泽湿地明显高于岛状林和小叶章草甸,最大值(为284.1 g kg-1)出现在10~20 cm,20 cm以下明显下降。从环型沼泽湿地边缘向中心,土壤剖面有机碳储量明显增加。1m深度内有机碳储量分别为1.04、1.48和4.22×104t km-2。
The distribution characteristics of organic carbon in the soil profile of the typical toroidal wetlands in the Sanjiang Plain were studied by means of island forest (brown soil meadow albic soil), small meadow grassland (latent soil white soil) and Carex lasiocarpa wetland (humus swamp soil) With the accumulation of the status quo. The results show that the organic carbon content and organic carbon storage in the soil profile change obviously from the margin to the center of the ring marsh. The soil organic carbon content in the section of Carex meadow was higher than that in the island forest, but there was no significant difference between the two. The maximum value (284.1 g kg-1) appeared in the marsh wetland of Carex lasiocarpa 10 ~ 20 cm, 20 cm below the obvious decline. From the margins of the circular swamp wetlands to the center, the organic carbon storage in the soil profile increased significantly. The organic carbon storage in the depth of 1m was 1.04, 1.48 and 4.22 × 104t km-2, respectively.