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通过比较研究，探讨了坡地赤红壤结构退化过程的特征．结果表明，与地带性自然植被下的坡地赤红壤比较，次生植被或人工植被下的坡地赤红壤结构退化现象明显，表现在表土砂化，即砂粒含量相对增加，粘粒含量相对减少；土壤结构稳定性下降，主要体现在较大粒径水稳性团聚体减少；土壤孔隙性变差，主要体现在容重增加和较大孔径孔隙减少．对自然赤红壤而言，容重增加、较大孔隙减少更为明显：对耕型赤红壤而言，土壤结构稳定性下降，表土砂化更为突出．
Through the comparative study, the characteristics of the degradation process of the latosolic red soil in sloping land were discussed. The results showed that, compared with the hilly red soil under natural vegetation, the structure degradation of the hilly red soil was obvious under the secondary vegetation or artificial vegetation, which showed that the surface soil was sanding, that is, the sand content was relatively increased and the clay content was relatively decreased. Structural stability decreased, mainly in the larger particle size water-stable aggregates decreased; soil porosity deteriorated, mainly reflected in the bulk density increased and the larger pores reduce. For natural latosolic soil, bulk density increased, the larger the pore reduction is more obvious: for cultivated latosolic soil, the stability of soil structure decreased, surface sandification is more prominent.