平菇对培养料中有害重金属的富集及临界含量值研究

Bioaccumulation of Cadmium,Lead,Mercury and Arsenic in Pleurotus ostreatus Fruit Bodies and Their Critical Concentration in the Cultivation Substrate

以平菇（Pleurotus ostreatus）农科P1号为研究对象,通过在培养料中投放不同浓度的氯化汞、氯化镉、三氧化二砷和硝酸铅,研究平菇对培养料中铅（Pb）、镉（Cd）、汞（Hg）和砷（As）4种有害重金属的吸收富集规律及培养料中各种重金属临界含量值。结果表明,平菇农科P1号对培养料中Pb、Cd、Hg和As的吸收富集系数分别为0.027-0.121、0.161-1.440、0.062-0.376和0.112-0.695。平菇对4种重金属的吸收富集能力排序为Cd〉As〉Hg〉Pb。平菇培养料中有害重金属Pb、Cd、Hg和As的临界含量值分别为（mg/kg湿重）18.88、0.44、0.94和3.91。

Accumulation of cadmium,lead,mercury and arsenic in fruit bodies of Pleurotus ostreatus,strain nongkeP1,was investigated,and the safe concentration limits（critical concentrations） of the four heavy metals in the cultivation substrate were estimated.Accumulation coefficients for Cd,Pb,Hg and As ranged between 0.161～1.44,0.027～0.121,0.062～0.376 and 0.112～0.695,respectively.Accumulation efficiencies were in the order CdAsHgPb,and critical concentrations of Pb,Cd,Hg and As in the cultivation substrate were 18.88,0.44,0.94 and 3.91 mg/kg wet weight,respectively.