磷对镉污染土壤中水稻吸收积累镉的影响

采用盆栽试验,研究水稻土中施磷对水稻吸收积累镉的影响。结果表明,施磷能够缓解镉对水稻的毒害作用,提高水稻的生物量。当镉浓度相同条件下,随着施磷浓度的增加,水稻根、茎叶和糙米中镉含量均呈显著下降趋势,其中施磷量为450mg·kg-1时效果最显著。植株体内镉主要集中在根部,其次是茎叶部。此外植株中镉含量与土壤环境中镉浓度呈极显著正相关。

Influence of phosphate application on rice absorbing and accumulation of Cd in Cd polluted paddy soil

Effects of phosphorus and cadmium interaction on the growth of rice in paddy soils by pot trials were studied.The results showed that P can alleviate the toxicity of cadmium to rice and improve biomass of rice.Under the same cadmium contennt,with P concentration increasing,cadmium content in rice roots,stems and leaves and brown rice can decrease.When P content was 450 mg·kg-1,the effect was the best.Cadmium in plants was mainly concentrated in roots,secondly was stem department.In addition,the cadmium content in plant and soil environmental cadmium concentration have significantly positive correlation.