Abstract:

Deeply influenced by karst geological environment, the structure of the soil ecological system in the southwest karst area of China is characterized by vertical-space differentiation strongly, irrefragable and its function is characterized by poorly nutrient elements cycling, flawed vegetation growing. On the basis of analysis of the soil ecosystem system’s structure and function vulnerability, the degradation processes and mechanisms of the soil ecological system in the southwest karst area had been analyzed and were discussed from structure, nutrient, moisture and microbial points of view in this paper from the angle of the material-energy cycle.