浙中典型富硒区土壤硒含量及形态特征

本文通过对浙江省中部典型富硒土壤区的调查研究,初步总结了其土壤硒含量特征。发现区内土壤硒含量表现为表层富集的趋势,平均含量达0.40mg/kg,含量水平远高于区域背景,总体达富硒水平。研究同时发现,不同土地利用方式土壤有效硒含量差别较大,旱地土壤平均约高出水田土壤1倍。有机态硒是硒元素的主要赋存形态,其含量比例高达63.7%,反映了土壤中硒富集与有机质活动的密切关系。另外,研究还发现,区内土壤环境质量总体较好,这为富硒土壤的开发利用提供了基本前提。

Study on Selenium Contents and Combined Forms of Typical Selenium-rich Soil in the Central Part of Zhejiang Province

Based on the study of typical selenium-rich soil in the central part of Zhejiang Province,some important conclusions were drawn.It was found that the selenium contents were much higher in surface soil than in deep soil,with an average of 0.40 mg/kg,which was much higher than the regional background value.In addition to that,the contents of available selenium in soil under different land use patterns were significantly different.The contents in the dry land were twice those in the paddy field.Further research showed that organic form was the main combined form,with the content percentage coming up to 63.7%.It was indicated that selenium was closely related to soil organic matter.Finally,it was found that the soil environmental quality was all better,which was available for selenium-rich soil development.