Abstract:

Through the multiobjective geochemistry exploration in the southern area of the Song-Nen plain,the distribution characteristics of different elements and their contents in different kinds of soils in the 8.15 square kilometers area are ascertained. On the basis of analysis on contents of elements in different kinds of soils,the paper reveals that black soils are rich in nutritious elements,and the contents of toxic elements are low. The black soil shows neutral and fits for planting.According to the classification of soils in the measurement area in term of environmental quality standard for soils, the first-grade region,in which none of the elements exceed the standard in the area, totally account for 96.08 percent. The black soil of agricultural land is pure land without heavy metal element pollutions and is suitable for planting.

Key words: black soil, characteristics of element content, Heilongjiang Province, Song-Nen plain