【摘要】 采用室内连续培养的方法,研究了不同水分条件下,不同用量CaCO3对土壤Cd形态的影响。结果表明:在持续淹水、70%田间持水量及干湿交替条件下,施用不同量CaCO3均明显降低了土壤中可交换态Cd含量,其作用顺序是:CaCO3用量0.4%>0.2%>0.1%;而Cd的碳酸盐结合态、铁锰氧化物结合态和有机结合态均增加,其中碳酸盐结合态Cd的增加趋势为CaCO30.4%>0.2%>0.1%。更多还原

【Abstract】 A laboratory incubation experiment was conducted to study the water and calcium carbonate application in cadmium forms in soil.The results showed that after added with calcium carbonate,the content of exchangeable Cd was decreased remarkably,but the contents of carbonate-bound,Fe/Mn oxide-bound and organic-bound Cd were increased under the different water status which included the continuous submerging,70% water holding capacity and wetting-redrying.The decreased effects of CaCO3 on the exchangeable Cd was CaCO3 0.4%>0.2%>0.1% and the increased effects of CaCO3 on the carbonate-bound Cd was CaCO3 0.4%>0.2%>0.1%.更多还原