【摘要】 通过田间试验,研究了土壤调理剂对中轻度镉污染稻田土壤的修复效果。结果表明:施用该土壤调理剂可显著提高土壤pH值,提高幅度最高可达0.47个单位,在施用量为1 125和1 500 kg/hm~2条件下,土壤有效态镉平均浓度分别降低了0.114和0.127 mg/kg,精米镉含量分别下降了34.8%和39.2%,稻谷产量分别增加了8.7%和11.6%。该产品可有效改善酸性土壤理化性质、降低土壤镉的可移动性、减少水稻镉吸收、提升稻谷产量,进而提高经济效益。更多还原

【Abstract】 The effect of soil amendment on cadmium-polluted acidic paddy field was investigated in this study. The results showed that the soil amendment significantly improved the soil pH value with the most up to 0.47 units. Under two soil conditioner rates of 1 125 kg/hm~2 and 1 500 kg/hm~2, contents of soil available cadmium reduced by 0.114 mg/kg and 0.127 mg/kg, cadmium contents in milled rice reduced by 34.8% and 39.2%, and rice yields increased by 8.7% and 11.6%, respectively. The application of soil conditioner can effectively improve soil physical and chemical properties, lower the mobility of cadmium in soil, reduce cadmium uptake by rice, increase rice yield,and further enhance economic returns.更多还原