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Effects of organic matter on the forms of added Cd and its dynamic transformation in soil with or without growth of rice
Author(s): 
Pages: 95-98
Year: Issue:  1
Journal: CHINESE JOURNAL OF ECO-AGRICULTURE

Keyword:  稻草紫云英水稻Cd形态转化;
Abstract: 试验研究稻草、紫云英对稻作土壤和非稻作土壤中外源Cd形态及其变化的影响结果表明,稻草、紫云英显著降低培养30d和培养90d后非稻作土壤中交换态Cd含量.强烈还原条件下形成的硫化镉沉淀是稳定非稻作土壤交换态Cd含量的重要机制.稻草和紫云英对稻作土壤中外源Cd形态转化的影响不同,培养30d后稻草和紫云英提高稻作土壤中氧化锰结合态和紧有机质结合态Cd含量,降低交换态Cd含量,其作用随时间的推移,氧化锰结合态Cd和紧有机质结合态Cd被释放出来并向交换态Cd转化,使交换态Cd含量提高.
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