矿区周围土壤-水稻系统重金属迁移累积规律研究

Study on Accumulation of Heavy Metals in Soil-Rice System around Mine Area

[目的]为徐矿集团庞庄矿区水稻的安全生产提供科学依据。[方法]采用火焰原子吸收法,测定徐矿集团庞庄矿区周围10个水稻高产示范田的土壤、水稻糙米中重金属含量,分析重金属在土壤-水稻系统中的迁移累积规律。[结果]水稻糙米对土壤Cu、Pb、Cr、Cd、Zn的平均积累率分别是0.108、0.008、0.009、0.145和0.223。[结论]水稻糙米对不同重金属的吸收、迁移和积累能力不同。在5种重金属中,水稻糙米对Zn、Cd和Cu的积累能力较高。

[Objective] The research aimed to provide the scientific basis for rice safety production.[Method] The flame atomic absorption spectrophotometry method was adopted to determine the contents of heavy metals（Cu,Pb,Cr,Cd and Zn） in soil and brown rice from 10 high-yielding and high-efficient demonstration fields around Pangzhuang Mine of Xuzhou Mining Area.And the rules of migration and accumulation of heavy metals in soil-rice system were analyzed.[Result] The average accumulation rate of brown rice towards Cu,Pb,Cr,Cd and Zn in soil was 0.108,0.008,0.009,0.145 and 0.223,respectively.[Conclusion] The capabilities of absorption,migration and accumulation of brown rice were different to heavy metals.Furthermore,accumulation capabilities of Zn,Cd and Cu of brown rice were relatively high.