摘要
以热带亚热带土壤为研究对象，用连续分级浸提法探讨了土壤中锰赋存形态与ｐＨ值的关系。结果表明：土壤中的锰处于一种动态平衡状态，各形态锰的含量及其占全锰的比例随ｐＨ的变化而变化，其中代换态锰和有机态锰随ｐＨ值升高而减少，氧化态锰、无定形铁结合态锰和晶形铁结合态锰则随ｐＨ值升高而增加，土壤中锰的生物有效性则随ｐＨ值升高而降低。
The paper deals with the relationship between PH and distribution formsof manganese in soils in Southern China by using a sequential fractionation procedure.The results show that manganese in soils is in the process of dynamic equilibrium alldthe ratio of contents of various forms of manganese to total manganese in soils ischangeable with PH I which of exchangeable fraction and organic fraction decrease and ,however, of manganese oxide fraction and amorphous iron oxide fraction increase withPH. The bioavailability of soil manganese reduces with PH.
关键词
锰
赋存形态
PH值
转化
土壤
manganese, distribution forms, pH, transformation
