钾硅钙微孔矿物肥对稻田土壤及稻谷镉污染的阻控效果

以晚稻杂交品种"威优644"为供试水稻,采用田间试验研究了钾硅钙微孔矿物肥对重金属镉污染稻田土壤及稻谷中镉含量的阻控效果。结果表明:施用钾硅钙微孔矿物肥可改善水稻植株的经济性状,使水稻增产6.9%~13.6%;同时,可抑制土壤镉的生物有效性,可使土壤有效镉降低7.9%~26.3%,从而使稻谷中镉含量降低37.8%~42.4%。综合试验结果,建议钾硅钙微孔矿物肥的施用量为50~75 kg/667m~2。

Mitigation of Cadmium Accumulation in Soil and Rice with Mineral Micropore Fertilizer with Potassium,Silicon and Calcium

Take Late rice hybrids “Weiyou 644” as experiment material, the mitigation of cadmium accumulation in soil and rice with mineral micropore fertilizer with potassium, silicon and calcium was studied by ifeld experiment. The results showed the mineral micropore fertilizer with potassium, silicon and calcium improved the economic characters of rice plants, and rice yield increased by 6.9%-13.6%;meanwhile, inhibits the bio-availability of soil cadmium, the effective cadmium content of the soil decreased by 7.9%-26.3%, and the cadmium content of the rice grain decreased by 37.8%-42.4%. The trial results suggested that the application rates could be 750-1125 kg/hm2.