| In this paper, soil organic carbon density and storages in Larix gmelini Forests which was burned by Forest fire was calculated by field investigation and reference review. Based on the results showe that,1) the different of fire have the different result to soil,but moderate intensity and light intensity have effect to the Soil moisture more than high intensity. The variation of soil bulk density in 0.67—1.23 (g/cm-3),as depth the soil bulk density more it have grown much.But soil moisture have the different effect.2)Organic carbon density and storages under different fires in the soil of 0-10cm are moderate intensity>light intensity>high density>no fire.Although after different fires,soil organic carbon density and storages are less than before.Wholely speaking, there are not many differences between them.Organic carbon density and storages of different fires in the soil of 10-20 cm are no fire>severe fire>mild fire> moderate fire,which shows that after different fires,soil organic carbon density and storages are more than before.Among them, organic carbon density and storages in the no-burnt soil are similar to those in the severe-burnt soil,but different with those in the moderate- burnt soil and mild- burnt soil.3) Soil organic carbon density and storages in the soil of 0-10cm and10-20cm are similar under the severe-burnt soil,but different under the moderate- burnt and mild- burnt soil.4)According this study,it also concludes that organic carbon density and storages in the soil of 0-10cm is more than those in the soil of 10-20cm.We uesd geostatistics for soil density and tree DBH to interpolation, we could found as the more tree there have the less soil contents.Soil space correlation more than the others.The fire have some certain influence to the soil.Follow the different influence have the differe result.The research will supply for the north of forest soil,and provided Scientific basis...
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