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选择三江平原典型环型湿地,分层采集岛状林、小叶章草甸和毛果苔草沼泽湿地土壤,调查了土壤DOC含量、储量水平和垂直分布状况,分析了环型湿地特殊的水文地貌条件对DOC分布的影响。结果表明,环型湿地土壤DOC含量均随着土层深度增加而不断减小;毛果苔草沼泽湿地土壤剖面的DOC含量显著高于小叶章草甸和岛状林,小叶章草甸和毛果苔草沼泽湿地剖面DOC含量显著高于岛状林;环型沼泽湿地土壤DOC累积现状为小叶章草甸土壤剖面DOC储量最大,岛状林其次,毛果苔草沼泽湿地最小,其60cm深度内土壤DOC储量分别为0.111 3,0.084 4和0.058 8t/hm2。
The typical wetland in the Sanjiang Plain was selected to collect the island forest, the small meadow and the Carex lasiocarpa wetland soils. The contents of DOC, reserves and vertical distribution were investigated. The special hydrogeological conditions of the wetlands The impact of DOC distribution. The results showed that the content of DOC in ring wetland soil decreased with the increase of soil depth. The DOC content in the soil profile of Carex marijuana wetland was significantly higher than that in C. anglica meadow and island forest, The DOC content of the wetland profile was significantly higher than that of the island forest. The DOC accumulation status of the soil in the circular swamp wetland was the largest in the soil profile of the meadow and the lowest in the forestland. The DOC contents of the soil in the depth of 60cm were 0.111 3, 0.084 4 and 0.058 8t / hm2.