珲春市苹果梨主产区土壤微量元素地球化学特征研究

Study on Geochemistry Characteristic of Trace Element in Soils in Apple-pear Production Area of Hunchun City

[目的]分析珲春市苹果梨主产区土壤微量元素的地球化学特征。[方法]在吉林省珲春市苹果梨果品基地采集32个表层土样和3个剖面土样,研究了微量元素在表层土壤中的含量及在土壤剖面中土壤地球化学特征。[结果]土壤微量元素Cr(K=0.894)和Co(0.904)平均含量与全国土壤平均值基本相当;As(0.341)、Hg(0.550)、Cu(0.659)、Ni(0.677)、Se(0.702)、Cd(0.774)和Zn(0.812)低于全国土壤平均值;Pb(1.029)的高于全国土壤平均值。在3个剖面中,As、Cr、Co、Cu、Zn和Ni呈现出底土层>心土层>表土层的趋势;Cd呈现出表土层>底土层>心土层;Hg和Pb呈现出底土层>表土层>心土层;而Se基本呈现出下部含量高于上部。[结论]该区表层土壤大部分微量元素含量较低;在3层剖面中未表现出明显的特征。

[Objective] The study aimed to analyze the geochemistry characteristic of trace element in soils in apple-pear production area of Hunchun city. [Method] 32 surface soil samples and 3 profile soil samples were selected in the Hunchun apple-pear base to study the trace element contents in surface soil and the geochemical characteristics in the soil profiles. [Result] The average contents of trace element Cr（0.894）and Co（0.904）in the surface soil were similar to the national average content, that of As（0.341）, Hg（0.550）, Cu（0.659）, Ni（0.677）, Se（0.702）, Cd（0.774）and Zn（0.812）were lower than the national average content and that of Pb（ 1.029）was higher than the national average content. Among the 3 profiles, the contents of As, Cr, Co, Cu, Zn and Ni showed the trend of substratum〉 subsoil layer〉 surface soil layer, Cd content displayed surface soil layer〉 substratum〉 subsoil layer, the contents of Hg and Pb displayed substratum 〉 surface soil layer 〉 subsoil layer and Se content in the depth soil was higher than that in the surface soil. [Conclusionl The content of trace elements in surface soil is lower, the distributions of all trace elements in the 3 profile didn＇t showed obvious characteristics.