不同土壤改良剂对镉污染稻田安全生产的影响

Effects of Different Soil Amendments on Safe Production of Cadmium-contaminated Rice Fields

为实现镉污染稻田的安全生产,通过野外田间小区试验,探究9种土壤改良剂对稻米中Cd含量的影响。结果表明:与空白对照相比,添加9种土壤改良剂均能降低水稻各器官Cd含量及水稻根和米Cd吸收系数,但不同土壤改良剂对土壤pH影响却不同;其中添加石灰、硅肥、镁肥、赤泥和钙镁磷肥对水稻根和米中Cd吸收系数降幅较大,效果较好。该研究可为土壤改良剂的复合配施提供数据支撑。

In order to achieve safe production of cadmium-contaminated paddy fields,the effects of nine soil amendments on Cd content in rice were investigated through field plot experiments.The results showed that:Compared with the blank control,the addition of nine soil amendments could reduce the Cd content of all organs of rice and the Cd absorption coefficient of rice roots and rice,but different soil amendments had different effects on soil pH.The addition of lime,silicon fertilizer,magnesium fertilizer,red mud and calcium magnesium phosphate fertilizer has a large decrease in the Cd absorption coefficient of rice roots and rice,and the effect is better.This study could provide data support for the compounding of soil amendments.