Shallow Soil Geochemical Characteristics And Environment Geological Significance Of Kangbao In Hebei

Through investigating the geochemical characteristics of the multi-target area of the wavy plain area of Bashang Plateau in Kangbao County in Hebei Province,this thesis ascertains the geochemical distribution characteristics of the elements in the area,which are of great reference value to the agricultural production and environmental protection.The soil sample was taken from the wavy plain area of Bashang Plateau in Kangbao County,which has not yet been carried out by the provincial agricultural geological survey project.The survey area is 2020km2.The sampling depth was 20cm and 130 samples were collected.The sample analysis including soil beneficial elements,harmful elements and soil physical and chemical properties in total of 20 items was carried out in strict accordance with the Geochemistry Investigation Standard of DZ/T 0258-2014 of China Geological Survey.According to the distribution characteristics of the soil containing beneficial elements and harmful elements,the soil nutrient and pollution status in the survey area were evaluated.The results of the project are as follows.1.By collecting and reading the research achievements of predecessors,field reconnaissance and field work,fully understand and master the situation in the study area,including geography,social economy,water resources,geological features,geological tectonic characteristics,formation characteristics and the climate characteristics and so on;2.According to the landscape of researching area,distribution characteristics of soil elements is analyzed,including heavy metals?As,Cd,Cr,Hg,Pb?,soil beneficial elements(N,P,K₂O,TFe₂O_3,B,Mn,Mo,Cu,zinc,Se,CaO,MgO style,S),soil physical and chemical indicators?pH,organic carbon?3.Through the single factor index method to evaluate koho evaluation area of soil heavy metals,koho evaluation area Pb,Cr,Cd,As,Hg,five kinds of heavy metal content single factor index is less than 1,conform to the national environmental quality standards.Then,the quality of soil environment in the evaluation area of kangbao was evaluated by using the nimelo integrated pollution index method,and the results showed that the evaluation area also reached the level of soil level.4.The degree of deficiency of Se in the evaluation area was evaluated and compared with selenium in the hebei plain.The results show that there are some differences in the content of selenium in the evaluation area.The evaluation area of health insurance is moderate,lacking and lacking.Compared with hebei plain area,there are some differences.The content of selenium is lower than that of hebei province.5.The main component analysis of nutrient elements in the evaluation area of kangbao was analyzed,and the comprehensive level of soil nutrients in the evaluation area of kangbao was 35.34%.The overall level is low.Compared with the hebei plain,the evaluation area has a large gap in nutrient synthesis.