作　　者： ; ; ; ; ;

机构地区： 华南农业大学资源环境学院

出　　处： 《土壤学报》 2010年第5期888-895,共8页

摘　　要： 通过田间试验方法,研究了在铅锌矿废水污染的土壤上施用废料碳酸钙对第1、2季低累积玉米(Zea mays)产量以及重金属Cd、Pb、Zn和Cu含量的影响,并分析了施用废料碳酸钙后土壤pH和土壤有效态重金属含量的变化。结果表明,施用废料碳酸钙,玉米产量均有显著提高,其中高量废料碳酸钙处理效果最佳,第1季增产154%,第2季增产275%,玉米对Cd、Zn和Cu吸收量降低,玉米籽粒Cd、Zn和Cu含量降低到了国家食品卫生标准允许的含量水平。与对照比较,废料碳酸钙不同用量水平均能不同程度地提高土壤pH,降低土壤有效态重金属含量,并抑制茎叶Cd和Cu向玉米籽粒的转移,从而造成玉米籽粒重金属含量降低。 A field experiment was carried out to study effects of waste-CaCO3 on growth and heavy metals（Cd,Pb,Zn,Cu） concentration of a low-accumulating cultivar of Zea mays in a soil contaminated by waste water from a lead/zinc mining,and changes in soil pH and available heavy metals content as affected by application of waste-CaCO3.Results show that waste-CaCO3 increased yield of the plant significantly.The effect was the most significant in treatments of high waste-CaCO3 application rate,where the first crop increased its yield by 154% and the second by 275% as compared with the control,and lowered their uptake of heavy metals（Cd,Pb,Zn,Cu）.As a result,their concentrations in the grains were below the criteria of the Natural Food Hygiene Standard.Waste-CaCO3,regardless of its application rate,increased soil pH and reduced the concentration of available heavy metals in the soil to a varying extent,and inhibited translocation of Cd and Cu from stem to grains of the plant,resulting in lower heavy metal concentration in the grains of Z.mays.

关 键 词： 低累积作物 玉米 废料碳酸钙 重金属 转运系数

领　　域： [环境科学与工程]