Rice was grown in soil co-amended with coal fly ash (FA) with municipal biosolids (MBS) to study the accumulation of heavy metal (HM) in rice seeds from FA with the co-amendment of MBS. Element-analyses of soil samples, plant-roots and seeds revealed the accumulation of HMs, Fe, Mn, Ni, Co, Zn, Cu and Pb proportionate to the FA doses. For ascertaining some suitable amendment-doses for maximal grain yield with the least accumulation of HMs, principal component analysis (PCA) was carried out with data from three rabi (winter) seasons. With PCA, the variance of performance of FA and MBS together was obtained, 87.25%. It could be concluded that the double amendment levels up to 10 Mg ha⁻¹ FA + 7.5 Mg ha⁻¹ MBS would be the desirable on soil with the accumulation of Pb12 ppb; nonetheless, the toxicity from other HMs was noted at the level 12 mg Mg⁻¹ in rice grains.

将水稻种植在与粉煤灰（FA）和市政生物固体（MBS）共同改良的土壤中，以研究通过FAS与MBS共同修正的水稻种子中重金属（HM）的积累。对土壤样品，植物根和种子的元素分析显示，HMs，Fe，Mn，Ni，Co，Zn，Cu和Pb的积累与FA剂量成正比。为了确定一些适当的修正剂量，以最大的谷物产量和最小的HMs积累，对主要成分分析（PCA）进行了三个狂犬病（冬季）季节的数据分析。使用PCA，FA和MBS的性能差异总计达到87.25％。可以得出结论，双修正水平最高为10 Mg ha ^-1 FA + 7.5 Mg ha ^-1MBS在土壤中以Pb12 ppb的积累为理想。尽管如此，在稻谷中发现其他HMs的毒性为12 mg Mg ^-1。