纳米矿物基土壤调理剂对水稻富集镉的影响

将纳米矿物基土壤调理剂应用于镉污染耕地水稻种植,施用土壤调理剂对水稻产量无显著影响,但可显著降低稻米中的镉含量,也可以有效降低土壤中有效态镉的含量。施用该土壤调理剂1 500~4 500 kg/hm2,土壤有效态镉含量下降25.00%~35.71%,稻米镉含量则下降20.31%~50.00%,降镉效果随调理剂用量的增加而提高。同时,对纳米矿物基土壤调理剂的降镉机理进行了探讨,对材料应用的经济效益进行了简要分析。

Effects of nano mineral soil conditioner on the accumulation of cadmium in rice

The nano mineral based soil conditioner was applied to the cultivation of rice in the cadmium polluted farmland.The application of the conditioner had no significant effect on rice yield,but significantly decreased the cadmium content in rice and also reduced the available cadmium content of soil effectively.When applying the soil conditioner at 1 500~4 500 kg/hm2,the available cadmium content of soil decreased by 25.00%~35.71%,the cadmium content of rice decreased by 20.31%~50.00%.The effect of cadmium reduction became better with the increase of the amount of conditioner.At the same time,the mechanism of reducing cadmium was discussed,and the economic benefit of the material application was briefly analyzed.