南、北盘江流域（贵州部分）土地退化类型及机理

在对珠江上游南、北盘江流域（贵州部分）调查的基础上，分析了该流域土地退化成因，原生生态系统的脆弱性只是导致土地退化的一个方面。而人为活动才是土地退化的主要因素。根据土地退化的成因、结果，将珠江上游南、北盘江流域（贵州部分）土地退化划分为：土壤侵蚀、石漠化、土地贫瘠、土壤污染、土壤破坏五种类型，并提出了退化土地的管理及恢复措施。

Soil Deterioration Types and Their Mechanisms in Watershed of Nanpanjiang and Beipanjiang Rivers

Based on the field investigation on the watershed of Nanpanjiang and Beipanjiang Rivers (Guizhou province) , this paper analyzed the causes of the soil deterioration, and suggested that the primary ecological fragility be only one of the causes, and the human activities were the main reasons for the soil deterioration. According to the different causes and the results, the soil deterioration in this area could be divided into five types: soil erosion, desertification, soil impoverishment, soil pollution, soil damage. At last, the management and restoration strategies for the degraded soil were proposed.