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当前位置: 首页 > 文章 > 不同土壤性质和P水平下土壤-植物系统中的Zn-Cd交互作用研究 农业环境科学学报 2005,24 (06) 1041-1047
Position: Home > Articles > Zinc-Cadmium Interaction in Soil-Plant Systems Under Different Soil Properties and Phosphorus Levels Journal of Agro-Environment Science 2005,24 (06) 1041-1047

不同土壤性质和P水平下土壤-植物系统中的Zn-Cd交互作用研究

作  者：
赵中秋;蔡运龙;朱永官
单  位：
北京大学环境学院;中国科学院生态环境研究中心
关键词：
土壤性质;P;Zn;Cd;小麦
摘  要：
采用Zn背景值和P含量都较高的肥沃的农田粘质土和缺Zn缺P的贫瘠的沙质土进行盆栽试验,研究了不同土壤性质和P水平对土壤-植物系统中Zn-Cd交互作用的影响。结果表明,在试验1非缺Zn的土壤条件下,施Zn(0～100mg·kg-1)对小麦幼苗体内Cd的浓度无明显影响,只有在Zn浓度高至污染水平(1000mg·kg-1土)时,才显著降低小麦幼苗体内Cd浓度;而在试验2缺Zn缺P的土壤条件下,施加低浓度的Zn(0～10mg·kg-1土)即显著影响了小麦幼苗对Cd的吸收(P<0.001)。施加试剂纯的P(CaHPO4)也显著影响了小麦幼苗根和地上部的Cd浓度,过去多认为P肥促进植物对Cd的吸收是由于P肥中含有一定量的Cd所致,试验结果提示了P肥促进植物对Cd的吸收与P元素本身也有关系。
译  名：
Zinc-Cadmium Interaction in Soil-Plant Systems Under Different Soil Properties and Phosphorus Levels
作  者：
ZHAO Zhong-qiu1,CAI Yun-long1,ZHU Yong-guan2(1.College of Environmental Sciences,Peking University,Beijing 100871,China;2.Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)
关键词：
soil properties;phosphorus;zinc;cadmium;wheat
摘  要：
To investigate the effects of soil properties and phosphorus(P)levels on zinc(Zn)-cadmium(Cd)interaction in soil-plant systems,two pot experiments were conducted.The soil used in experiment 1 was fertile clay with high levels of Zn and P,while,the soil in experiment 2 was arid sandy soil deficient of Zn and P.The results showed that,in experiment 1,addition of Zn(2~100 mg·kg-1)to soil had no significant effects on Cd concentrations in wheat(Triticum aestivum,L.)seedlings grown in Zn-affluent soils,and only when the added Zn was up to severe contamination,Cd uptake by wheat was inhibited significantly.In experiment 2,however,even low levels of Zn addition(1~10 mg·kg-1)had significant effects on Cd uptake by wheat(P<0.001).Addition of reagent pure P(CaHPO4)also had significant effects on Cd concentrations in shoots and roots of plants.In the past,it was generally ascribed to Cd impurity in P fertilizer that P fertilizer increased the absorption of Cd in wheat,but according to the above results,we suggested that P element itself had effects on Cd uptake by plants and Cd transfer from root to shoot.

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