中文摘要：

针对无机盐对土壤中各种形态镉离子的影响,用Tessier连续提取法进行试验,研究了不同种类、不同添加量的无机钠盐对土壤中不同形态的镉离子含量的影响。结果表明,向土壤中加入不同的无机钠盐对于镉的存在形态产生的影响不同。对于镉的可交换态,NaCl和Na2SO4的存在增加了它的含量,且添加量越大影响程度越大;而Na2CO3的存在则使其含量减少,在土壤中加入4g/kg的Na2CO3后,可交换态镉的含量减少了30.35%,加入8g/kg的Na2CO3后其含量减少了69.87%。碳酸盐结合态镉的含量受NaCl影响较大,随NaCl添加量的增加而减少,低添加量和高添加量的NaCl溶液进入土壤后,分别导致碳酸盐结合态镉的含量减少了7.30%、10.52%;Na2CO3则使其含量略微增加;Na2SO4对其影响较小,其含量基本不变。对于镉的铁锰氧化态,添加不同添加量的NaCl溶液后其含量基本不变;在添加Na2CO3溶液后其含量增加比较明显,随着Na2CO3溶液的质量浓度增加,镉的铁锰氧化态分别增加了8.67%和51.85%;Na2SO4的加入则使其含量减少。有机态和残余态镉的含量维持在一个很低的水平略有波动。总镉的含量在3种无机钠盐的影响下均减少。

英文摘要：

Different inorganic sodium salts were irrigated into batches of soil samples by setting contrastive experiments on the basis of Tessier sequential extraction procedure to study their influences upon cadmium forms in the soil.Results showed that all the three sodium salts were able to influence the forms of cadmium in the soil.NaCl and Na2SO4 added into the soil could increase the content of exchangeable cadmium,the higher the concentration,the greater the impact.However,Na2CO3 decreased the cadmium form by 30.35%（4 g/kg Na2CO3 added） and 69.87%（8 g/kg Na2CO3 added）.The content of carbonate-cadmium was influenced obviously by NaCl,with decrease of 7.30% and 10.52% corresponding to low concentration and high concentration of NaCl.Na2CO3 increased the cadmium form slightly,and Na2SO4 had little effect.The Fe-Mn oxidation form of cadmium remained the original level when NaCl was added in the samples while it increased obviously with addition of Na2CO3 and the concentration increased by 8.67%（4 g/kg Na2CO3 added） and 51.85%（8 g/kg Na2CO3 added）,but it decreased by addition of Na2SO4.The organic cadmium and the residual cadmium fluctuated slightly at a very low concentration.The total cadmium decreased with the addition of three sodium salts.