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作 者 ：任继凯, 陈清朗, 陈灵芝, 韩荣庄, 姚依群, 孔凡志, 缪有贵

期 刊 ：植物生态学报 1982年 6卷 2期 页码：131-141

关键词：污染；

摘 要 ：通过土壤镉污染对作物影响的盆栽模拟试验，以揭示重金属镉在土壤—植物系统中的转移、分布规律及其对植物生长、发育的影响。试验证明不同化合形态的镉施入土壤(砂壤质褐土，pH值8.2)，水稻对镉吸收的多寡依次为CdCl2>CdSO4>CdO>CdS>CdCO3。白菜的镉吸收表现为CdSO4>CdCl2>CdO>CdCO3。土壤的不同镉浓度(施加CdCl2，以纯镉计)对作物影响的试验结果表明，可食部位达到食品污染标准(谷物含镉量0.4ppm、蔬菜0.2ppm为暂定标准)时的土壤镉污染临界值分别为：小麦、莴苣、白菜<1ppm，茄子、萝卜<2.5ppm，番茄、菜豆<20ppm。土壤因子的处理影响镉的活动性；降低土壤pH值，水稻的镉吸收增加。增施有机肥、ZnSO4、S、CaO、CaSO4可降低糙米含镉量13.4%一30%。白菜的镉吸收，由于增施有机肥、FeSO4、Fe2O3、CaO或S而降低菜叶含镉量28%一61%。以Cd，Zn比1:100或1:200施入土壤，叶内含镉量分别下降61%和76.4%，但白菜产量减少61%和76%。

Abstract:Due to discover the characteristics of the translocation, distribution of heavy metal cadmium in soil-plant system and its effect on plant growth and development, the influence of cadmium applied to soil on crops was studied under simulated pot-culture.The results demonstrated that amending with various chemical form of cadmium to soil (a loamy-sand drab soil, pH8.2),the amounts of Cd uptaked by rice (Oryza sativa L.) showed following pattern: CdCl2>CdSO4>CdO>CdS>CdCO3 and chinese cabbage (Brassica pekinensis Rugr) followed the pattern of CdSO4>CdCl2>CdO>CdCO3. Under the treatment of cadmium concentrations (added as CdCl2, on the basis of Cd ), the critical concentrations of cadmium in soil while cadmium concentration was 0.4 ppm in crops and 0.2 ppm in vegetables for various crops was

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