Abstract:Minerological composition and chemical characteristics of albic soil in seven typical profiles all over the Jianghuai drainage basin were analyzed.The result showed that the albic soils in this region are silty loam or silty clay loam with a silt percentage of 45%~76%.Having inherited the characteristics of the loess, the main constituent of the clay is Hydromica, accounting 60%~80%.Sa and Saf of the soil are 7.70~14.65 and 6.43~10.24 respectively.But Sa and Saf of clay are 3.53~4.42 and 2.40~3.35 respectively.Compared with the other layers, Sa and Saf of the soil at the surface layer are higher or the highest,which manifests the phenomenon of surface silicon enrichment.Significant variations of Sa and Saf, together with that of clay composition and particle aistribution, show a parent material of the whitish layer not the same as that of the B horizon, which is due to the supposed alteration of alluviation and sedimention of loessial deposit in Holocene follow ed by leaching and illuviation.