不同改良剂抑制水稻吸收镉的研究——在酸性土壤上

Research on Soil Modifiers in Relation to Inhibition of Cadmium Up-taking by Rice in Acid Soils. Cao Renlin et al.

通过田间小区试验研究了锌肥、石灰,硅肥、钙镁磷肥、铬渣钙镁磷肥、石膏、牛粪、粉煤灰等8种改良剂在pH为5.27—5.63的酸性Cd污染土壤上抑制水稻吸收镉的效果。结果表明,以硅肥、钙镁磷肥或铬渣钙镁磷肥高用量(1.5kg/m^2)时效果最佳,不仅可显著提高土壤的pH,降低土壤中植物有效态镉含量和水稻米镉含量,而且可提高稻谷产量。

This paper reports that eight different ameliorators (zinc fertilizer, lime, silicate fertilizer, calcium magnesium phosphate fertilizer, calcium magnesium phosphate fertilizer produced with chromium residur (CRCMP), gypsum, cowdung and fly ash.) have different inhibition effect on cadmium up-takeng by rice plant in acid soils of pH from 5.27 to 5.63 polluted by Cd. The best results have showm when silicake fertilizer, calcium magnesium phosphate fertilizer or CRCMP were applied up to 1. 5kg/m^2. They can not only raise evidently soil pH, decrease available cadmium for plants and cadmium concentration of unpolished rice, but also increase rice yield.