氧化铁在中性和酸性水稻土以及红壤的结构体的形成中,具有重要的作用。因为土壤中氧化铁不仅是土壤结构体的胶结物质之一,而更重要的是它具有较高的活性,易随环境条件的变化而转变。这一转变可以概而言之为活化和老化两种过程。氧化铁的老化是重要的。因长期渍水而分散、又重新排列的土壤颗粒,只有在氧化铁老化后才能形成较为 Iron oxide plays an important role in the formation of structures in both neutral and acidic paddy soils and red soils. Because iron oxide in the soil is not only one of the cementitious materials of the soil structure, but more importantly, it has high activity and easily changes with environmental conditions. This change can be summarized as activation and aging of the two processes. Iron oxide aging is important. Due to long-term waterlogging and scattered, and rearrange the soil particles, and only after the formation of iron oxide aging