The Study On Chemical Elemenent Background Value Of Permafrost In Larix Gmelinii Forest

The paper investigates the chemical elements background value of the larix gmelinii in the Great Xinganling Mountains permafrost land, and analyzes its distribution characteristics of and influencing factors to different slope aspect,slope position and soil depth in virgin forest permafrost land, then compares with the soil background value of other.1.The significant difference exists in chemical elements content of the larix gmelinii virgin forest to different slope aspect,slope position and soil depth, it's distribution has vertical distribution regulation in different soil depth, but it has no significant distribution regulation in different slope aspect and slope position, and almost chemical elements content of permafrost land are near or equal to that in othat in other places in china.2.The chemical elements content of permafrost land is influenced by parent material,pH valae of permafrost land,organic matter,furthermore influenced by landform and vegetation, but different elements has different influencing factors and it's influencing degree.3.Comparing with elements content of permafrost land in successive cutting forest, it shows, artificial disturbance is the main reason, which caused the difference between the chemical elements content of permafrost land in successive cutting forest and in virgin forest.