用Jackson系统分离土壤磷的程序,研究了我国土壤中结合态硒的含量及其控制因素。结果表明,在酸性环境中,Fe、Al、Mn的氧化物或矿物是控制土壤硒化学行为的主要因子,Ca、Mg、K的作用不大。在碱性环境中,Ca、Mg、K的化合物或矿物是制约土壤非闭蓄性硒均主要因子,而控制闭蓄性硒的则是Fe、Al、Ma的氧化物或矿物。P、Si不仅以络阴离子的形式参与土壤硒的固定和影响植物对硒的利用,而且以化台物或矿物的肜式影响硒在土壤中的循环。在所研究的土壤中,未发现Cr、V、Sr、Ba、Co、Cu、Ni.Ti,Cd、Pb等与结合态硒含量在统计学上相关。

The content and controlling factors of association forms of selenium in soil have been studied in the major soils in China by Jackson's procedure separating soil phosphonous.The results show that in acid conditions, the oxides or minerals of Fe, Al, Mn are main factors controlling selenium chemical behaviour in soils, and the action of Ca, Mg, K is not significant. But in alkaline condition, the compounds or minerals of Ca, Mg, K are main factors controlling unenveloped selenium in soil,with the oxides minerals of Fe,Al,Mn controlling the enveloped selenium. P, Si not only take part in the selenium fixation in soil and affect the selenium utilization by plant in complex anion. but also affect the selenium cycle in soil in the form of compounds and minerals.The staustic correlation between association selenium and other elements such as Cr, V , Sr, Ba, Co, Cu, Ni was not found in all the studied soils.