吉林中部黑土区土壤硒元素土壤地球化学研究

通过对吉林中部黑土区土壤和玉米植物中硒元素的地球化学研究,分析了元素Se在土壤--植物之间的转化--吸收机制。研究结果表明:吉林黑土区土壤中Se的含量为0.126~0.408μg/g,高于吉林省土壤元素环境背景值,略低于全国土壤元素背景值;吉林省黑土区土壤中Se的含量存在空间差异;土壤Se元素有效态转化程度较低,玉米对Se元素表现为极弱吸收;有效Se与土壤Se全量无密切关系,而有效Se与有效Ca、pH呈极显著的正相关;土壤中Cr、Fe、Mg、Mn、Ni和Zn有效量对Se转化有明显的负作用;玉米籽实中Se含量与土壤中Se全量、有效量、土壤pH值及其他元素有效量均无显著的相关性。

Pedogeochemiscal research on Se in black soil areas of central Jilin Province

We have studied the geochemistry of Se from the black soil and its bearing plants such as maize in the central Jilin Province for revealing transformation and absorption mechanism of Se between soil and plants.The results indicate that：the Se contents in the black soil areas of the certral Jilin range from 0.126 to 0.408 μg/g,which is over the background value of Jilin Province and slightly below the background value of China.The Se contents in the black soil region of Jilin display spatial variations ; the transformation of available content of Se is slightly low in level,and the absorbing Se by maize was very low in degree; available content of Se has no significant connection with its total content,whereas its available content exhibits significantly positive link to the available content of Ca and the value pH.The available contents of Cr,Fe,Mg,Mn,Ni,and Zn display a significantly negative influence to the transformation of Se in the soil; and the content of Se in maize shows no clearly significant connection with the total and available content of Se,other elements and pH values.