长白山自然保护区北坡表层土壤中元素含量及分布

In order to investigate the distribution of elements in the surface soil of the north slope of Changbai Mountain Nature Reserve, portable X-ray fluorescence spectrometer was used to determine the contents of various elements in situ, understand the distribution characteristics of elements and compare the differences in the contents of elements in different locations. The results showed that: 1) Among the 38 elements detected by the instrument, 16 elements were detected on the north slope, and?the contents of K, Fe and Ca exceeded 5000mg/Kg, followed by S, Ti, Mn and Cl, which exceeded 400mg/Kg; 2) Among different forest types, low elevation dark coniferous forest had the highest content of K, Fe, Ca and other elements; 3) In the comparison between the protected area and the planning management area, the content of most elements in the soil of the protected areas was lower than that of the forest management planning management area; 4); The variation trend of Pb in soil was not obvious at different distances from the main highway, and the content of Zn decreased with the distance from the highway;?5) In different locations of major rivers, human activities lead to the enrichment of K, Cl and Zn elements in the downstream sediment.