有机肥和生态肥对土壤中镉行为以及水稻生长的影响

Effects of Organic Fertilizer and Ecological Fertilizer on Behaviors of Cadmium and Rice Growth in Cd Contaminated Soil

通过水稻盆栽试验,研究了有机肥和生态肥对镉污染土壤上水稻生长和土壤中镉形态变化的影响,以及对改善糙米品质安全性的作用。结果表明,有机肥和生态肥因性质差异,其效果不尽相同。和有机肥相比,生态肥不仅在促进水稻生长、提高水稻产量方面的作用更加显著,而且在降低土壤中有效态镉以及糙米、茎叶和水稻根中镉含量的作用效果更好。施用生态肥和有机肥使水稻体内镉含量和土壤中有效态镉含量的降低,主要是由于施用不同肥料导致的土壤中镉形态的变化。

Rice pot experiment was conducted in Cd contaminated soil to investigate the effects of organic fertilizer and ecological fertilizer on rice growth,yield formation,uptake of Cd by rice and fractions of soil Cd.Results indicated that although organic fertilizer and ecological fertilizer both promoted rice growth,increased grain yield and decreased the content of Cd in rice and effective Cd content in soil,ecological fertilizer induced these effects more remarkably,comparing with organic fertilizer.The main reason that two fertilizers decreased the content of Cd in paddy and effective Cd content in soil was that they changed Cd fractions in soil.