有机酸对土壤中镉形态及其生物有效性影响的研究进展

Advances of Effect of Organic Acid on Cd Forms and Bioavailability in Soil

根系分泌的低相对分子质量有机酸与土壤中镉之间相互作用影响着土壤中镉的吸附、解吸,使镉在土壤水植物系统中的迁移、转化规律发生重大改变,从而影响到镉在土壤中的形态及其生物有效性。对近二十年来有关有机酸与重金属镉交互作用的研究进展、有机酸对土壤中镉的有效性、毒性的影响以及作用机制进行了综述,并对现在研究存在的问题以及今后的研究趋势做了初步展望。

Cd^(2+) adsorption-desorption,Cd^(2+) movement and transformation in soil-water-plant system,Cd^(2+) forms and bio-availability were influenced by the interaction between low-molecular-weight organic acid with Cd in soil.A review with 34 references is given on recent advances in the study of interaction between organic acid with Cd,the effect of organic acid on Cd bioavailability and the toxicity,and existing problems in the recent studies and developing propects in the future.