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通过对云南省金沙江干热河谷典型区不同生态景观下土壤典型剖面系列的比较研究,初步确定了燥红土系列和变性土系列土壤退化过程的阶段及其土壤性状特征。研究结果表明,土壤腐殖质层(A) 厚度及其有机质含量、土壤结构性和容重、土壤全氮量、土壤开裂状况、粘粒活度等指标,可用于表征土壤退化过程的阶段特征;并提出了土壤退化过程有渐变、突变、跃变和复合型等演化型式。
Based on the comparative study of typical soil profiles under different ecological landscapes in the typical dry-hot valley of Jinsha River in Yunnan Province, the stages of soil degradation process and the characteristics of soil properties of the series of dry-red soil and degenerated soil were preliminarily determined. The results show that the soil humus layer (A) thickness and its organic matter content, soil structure and bulk density, soil total nitrogen content, soil cracking status, clay activity and other indicators, can be used to characterize the stage of soil degradation process characteristics; The process of soil degradation has gradual changes, mutations, transitions and complex evolutionary patterns.