摘要本文研究了五个土壤剖面(10个土壤层次)硒的含量范围及其分布特征。对于土壤含硒量的 DAN 荧光分光光度法的测定作了较为详尽的介绍。对土壤样品的消解处理作了较深入的研究。并对分析结果进行了论证。该方法相对标准偏差为3.3%,加标回收率在89.7%～93.5%之间。结果是满意的。该调查区内土壤中硒有如下分布特征:表层含量高于底层,由上而下呈递降趋势。且不同土质硒的含量分布有差异,一般粘土壤中硒的含量大于砂壤土。
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