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通过水培实验,研究As和Cr复合污染在有磷(+P)和无磷(?P)条件下对2个水稻基因型品种(Jin23A和CDR22)生长和吸收积累Fe,P,As和Cr的影响.实验结果表明,As和Cr复合污染可导致水稻茎叶干重下降,但对株高、根长和根干重均影响不大.施P肥可促进水稻生长,提高水稻生物量,缓解水稻的重金属毒害.As和Cr复合污染对水稻植株吸收积累Fe,P,As和Cr的影响不一.加As和加P均导致两个水稻品种茎叶和根中Fe含量下降.As对水稻植株P含量影响不大.P可促进水稻根系对As的吸收,而降低水稻对Cr的吸收积累.加As导致水稻Cr含量提高,尤其水稻根系Cr含量提高更明显.与对照相比,1.0mg/LAs浓度在不加P时分别导致Jin23A和CDR22根系Cr含量提高138.9%和283.6%,加P时则分别为40.2%和154.1%.此外,本文还讨论了Fe,P,As和Cr4种元素在水稻植株体内的迁移情况.
Hydroponic experiments were conducted to study the effects of As and Cr combined pollution on the accumulation and accumulation of Fe, P, As and Cr in two rice genotypes (Jin23A and CDR22) under phosphorus (+ P) and phosphorus .The results showed that the combined pollution of As and Cr could lead to the decrease of dry weight of stems and leaves of rice, but had little effect on plant height, root length and root dry weight.The application of P fertilizer could promote the growth of rice and increase the biomass of rice, Alleviate the heavy metal toxicity of rice.As and Cr combined pollution have different effects on the absorption and accumulation of Fe, P, As and Cr in rice plants.Addition of As and Pto lead to the decrease of Fe in the stem, P content in rice plants had little effect.P could promote the uptake of As in rice roots and reduce the absorption and accumulation of Cr in rice.The addition of As increased the content of Cr in rice and especially the Cr content in rice roots.Compared with the control The concentrations of Mg / LAs in the absence of P increased the Cr content of Jin23A and CDR22 by 138.9% and 283.6%, respectively, and were 40.2% and 154.1%, respectively, when P was added. In addition, Fe, P, As and Cr species Element migration in rice plants.