土壤调理剂对不同成土母质Cd污染稻田的修复效果

Remediation Effect of Soil Conditioner to Cd Polluted Paddy Field from Different Soil Parent Materials

选择不同成土母质发育的典型Cd污染稻田,研究土壤调理剂对土壤Cd形态及水稻Cd吸收的效果,为修复不同成土母质Cd污染稻田土壤提供科学依据。研究结果表明,施用土壤调理剂对水稻产量无显著影响,但能显著降低水稻稻米和植株Cd含量,并显著提高土壤p H值,有效降低土壤有效态Cd含量。施用土壤调理剂主要受其强碱性对土壤的调酸及降低土壤Cd有效性的影响,并受成土母质的调节。

Choosing different soil parent materials of typical Cd polluted paddy soil, researching the soil conditioners＇ effect on soil Cdmorphology and rice Cd absorption, toprovidea scientific basis for repairing different soil parent material of Cd polluted paddy. The resultshowed that the application of soil conditioner had no significant effect on rice yield, but it could significantly reduce the content of Cd inrice and improve soil pH value, it also reduced the content of Cd in soil effectively. The application of soil conditioner was mainly affectedby the strong alkali on soil acid adjustment and reduced the effectiveness of soil Cd, also affected by adjustment of soil parent materials.