生物菌肥与石灰配施对水稻吸收积累Cd的影响

Effect of bio-fertilizers and lime combined application on cadmium uptake by rice plant

采用田间随机区组试验的方法,研究了基施生物菌肥(Bi处理)与追施石灰(L处理)及其配合施用(Bi+L处理)对晚稻湘晚籼12号生物量、水稻对土壤Cd的富集情况、4个生育期内各部位间转运系数以及各部位中Cd含量的影响。结果表明,水稻各部位间Cd含量从大到小依次为根部、茎鞘、穗部、叶片,随不同生育期对营养物质的需求而改变,各处理不会影响水稻生物量及转运系数,并能降低水稻各部位富集Cd能力,使水稻糙米中Cd含量显著降低,其中以生物菌肥与石灰配施的降Cd效果最佳。

The field random plot experiments were applied in this study.The effect of base bio-fertilizer（Bi）,lime（L）,base bio-fertilize bio-fertilizer combined with lime（Bi＋L）on rice biomass and ability of late rice enrichment on soil Cd,Cd migration trend in 4growth periods and translation coefficient between organs were studied.Results showed that the order of Cd concentration in different parts of the paddy plant was root〉stem and sheath〉panicle〉leaf,which changed with the demand for nutrients in different periods.The enrichment ability and brown rice Cd content was remarkably reduced by the different modifier and processing measures.However,the rice biomass and translation coefficient was not influenced obviously.In addition,the maximal drop of Cd in all the processing modes belonged to the Bi＋L.