荒地红壤脱水过程中的结构性演变

Changes of Soil Structureness in Uncultivated Red Soil during Its Dehydration Process

以浙江金衢盆地未开垦的荒地红壤为例,研究了红壤心土层在逐步风干脱水条件下的结构性变化情况。结果表明,荒地红壤心土层土体在脱水条件下,结构性有所增强,生成了许多"假砂"结构体,使得土壤物理性质有所改善。此外,进一步研究了该变化过程中土壤持水能力的变化以及土体内胶结物质所起的作用。同时指出在荒地红壤改良中,进行开荒培肥、提高有机质含量对于该地区水土保持和农业生产的重要意义。

In research for understand of the changes of soil structureness in subsoil layer during its weathering and dehydration processes, the uncultivated red soil has been sampled. Our results indicated that the soil structureness of subsoil layer in uncultivated red soil has been enhanced due to the formation of pseudopsamatic structure after its dehydration. Moreover, the impacts of both waterholding capacity and binding material in relation to this process have been investigated. Whilst, the importance of reclamation and increasing organic matter content for soil and water conservation and agricultural production in red soil region have been emphasized.