耕作对喀斯特脆弱生态系统土壤具有重要影响，是造成土壤养分流失、退化的主要原因。
Tillage practice had important effect on soil nutrients loss and soil degradation in the fragile karst ecosystem.
喀斯特区由于土层薄、土壤允许流失量低，生态系统十分脆弱，植被破坏后难以恢复。
Because of thin solum and lower soil loss tolerance, the ecosystem in Karst region is very fragile. The vegetation is difficult to recover after destruction.
我国西南地区是全球喀斯特三大分布中心之一，属于典型的脆弱生态系统。
Southwest China is one of the three distribution centres of Karst in the world, and it is the typically fragile ecosystem.
我国西南地区是全球喀斯特三大分布中心之一，属于典型的脆弱生态系统。
Southwest China is one of the three distribution centres of Karst in the world, and it is the typically fragile ecosystem.
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