吉林省西部草地土壤的化学元素含量及其特征研究

对吉林省西部草地土壤化学元素含量研究表明，吉林省西部草地土壤中富钾少磷；钙、镁含量丰富；硼、铜、铁、锰含量在剖面上表现为向下增加；土壤中氮、磷、钾、钙、铜含量随草地退化程度的加深而减少；土壤中硅、钠含量丰富，显示出较强的沙化、盐碱化趋势，其含量随草地退化程度的加深而增加，钴含量随草地退化程度加深而降低；钡含量随草地退化程度的加深有增加的趋势；而稀土元素总量低于土壤背景值，并随着草地退化程度的加深其含量有减少的趋势。

Study on the Element Abundances and Their Characteristics of Soil in Grassland From Western Jilin Province

Several results have been obtained from the study on the element abundances of the grassland soil that underwent different degree of degradation in western Jilin province. First, the soil is rich in potassium and poor in phosphorus and the elements like calcium(Ca) and magnesium(Mg) , as two kinds of mediocre nutrient elements, are abundant in the soil of the area. Secondly, the contents of the trace nutrient elements such as boron(B), copper(Cu), iron(Fe) and manganese(Mn) increase with the soil deepening . Thirdly, the contents of nitrogen (N), phosphorus(P), potassium(K), calcium(Ca), and copper(Cu) in the soil decrease with the degradation of the grassland. Fourthly, high silicon(Si) and sodium(Na), sometimes barium (Ba), contents are found in the soil with intensive grassland degradation while cobalt (Co), has the opposite behavior. Fifthly, the grassland soil of the region is of rare earth element (REE) content smaller than their background value and the REE decrease in content with the grassland degradation.