安徽省南陵地区土壤Se分布特征及评价研究

Study on the Distribution Characteristics and Evaluation of Se in Soil of Nanling Area in Anhui Province

以安徽省南陵地区土壤Se为主要研究对象,结合少量农作物Se分析结果,对研究区进行了Se含量及分布特征研究,初步划定了区内富硒土壤标准,探讨了土壤Se、有效硒与重金属的相关性关系,为富硒土壤资源的推广应用提供了依据。结果表明:研究区土壤Se含量区间0.01~0.98mg/kg,平均含量0.32mg/kg,总体呈背景含量分布,少量的低背景土壤分布于青弋江沿岸,其含量与人为活动、土壤类型和地质单元存在一定的关系;初步圈定区内富硒土壤面积152.79km^2,证明该区具备一定的富硒土壤开发利用潜力;土壤Se常与重金属伴生,而有效硒与重金属相关性不明显,有效硒随土壤Se含量的增加而增加。

Taking Se in soil of Nanling area as the main research object, combining with the results of Se analysis of a small number of crops, the content and distribution characteristics of Se in the area has been identified In the paper. The standard of Se rich soil in the area is preliminarily defined, and the correlation among Se in the soil, effective Se and heavy metals has been discussed. It will provide a basis for the promotion and application of Se rich soil resources. As showed by the results, the content of Se in the study soil is 0.01~0.98 mg/kg, and the average content is 0.32 mg/kg. Se in the study area is generally distributed in accordance with background content, and a small amount of low background soil distributed along the Qingyi River coast. The content has a certain relationship with human activities, soil types and geological units. Se rich soil in the area is 152.79km^2. It is proved that the area has certain development potential. Se in the soil is often associated with heavy metals, the correlation between effective Se and heavy metals is not obvious, and the effective Se will increase with the increase of Se content.