关键词: 喀斯特, 脆弱生态区, 土地退化, 整治模式

Abstract: Ecologically fragile Karst area is a hotspot area concerned by academia. Owing to its intrinsic vulnerability and intense human activities, the ecosystem
 in this area is in degradation. Based on the degradation mechanisms of the ecosystem and the fragile degree of eco－environment in southwest Karst area of China, previous management experiences, and the factors leading to ecological deterioration, three types management modes of degraded ecosystem in ecologically fragile Karst area were summarized, i.e., ecological emigration-forest reservation-natural vegetation recovery, returning farmland into forestland-soil and water conservation-afforestation, and sustainable eco－agriculture-courtyard economy-resources industry. The appropriate areas for these modes, the problems needed to be paid attention in practices, and the cost－benefit analysis of these modes were also discussed.

Key words: Karst, fragile area, land degradation, management mode