The Investigation On The Process Of Black Soil Eroding By Using Rare Earth Element Trace Method

The soil erosion is one of the key problems in current environment problem in the world but highly concerned. The soil erosion is the root reason, which results in the land deteriorate, the soil property of physics and chemistry becomes more inferior and fertility descend, the land utilization lower, ecosystem environment depravation. Soil erosion caused by rain and the layer flow of slope land is thinked as simultaneous occurrence process of slope land soil of dispersion, deposition and diversion.This text application soil fixed position the small area take experiment and rare earth elements to show a tracer examination, by means of researching the soil erosion process about two pieces of soil, JingYue and YongJi county, study the research of application condition of the stability rare earth elements tracer process in the black land of Jilin province concerning the soil erosion,deposition,distribution,sediment, show that the behavior testified by REE tracer examination of the bio-geochemistry is more stability, was not absorb by the plant easily, and water moving also can't influence the qualitits of groundwater and earth's surface water. As a result the REE tracer examination to the ecosystem environment can't create the formation of disadvantageous influence. In each influence factor of water eclipse mat, the factors, which are the way of land maken use of and the strength of rain , influence the flush quantity to the soil the most and resulted in water eclipse importantly. The method of the REE tracer examination, maked use of ration measurement to the opposite erosion quantity of dissimilarity geography part, is more simple and easy for accurate evaluation erosion to the slope land about distribution, transport, deposition in two dimensions of space and time, having a importance of instruction meaning to find out soil erosion process and evaluation for the erosion model of the slope land and the drainage area, otherwise, developing a new approach for soil's erosion perpendicular research.