摘要
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。
After comparatively researching the typical soil profile series situated in dry and hot valley region of Jinsha river in Yunnan province under the condition of different ecological landscape, the phase of soil degradation process and its characteristics about dry red soil and vertisol series were initially determined. The indexes of thickness in soil humus horizon (A), content of organic matter, soil structure, content of total nitrogen in soil, or including soil fissure, clay activity and so on could be used in showing the phase characteristics of soil degradation process. Furthermore, the soil degradation model with change type in step by step, jump and combination in soil degradation process was put forward.
基金
云南省-中国科学院合作项目
云南省科委基础处与省院合作办资助
