According to BCR sequential extraction procedure,it analyzed the speciation distribution of Fe in main wetland types soil in Xiaoxing'anling,the results showed that:(1) The average content of total Fe was 12 423.81~15 755.18 mg/kg,which showed no significant difference among the three wetland types(p>0.05).The content of total Fe decreased with the depth of arborous mire and scrub mire,and reduced firstly and increased afterward with the depth of herb mire.The average content of weak acid extractable Fe app...