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岩溶土壤有机碳地球化学研究表明：岩溶土壤是有机碳的巨大储库；土壤有机碳含量以松结态为主，紧结态次之，稳结态最少；土壤表层，鞍部、坡地土壤有机碳较活跃（较多松结态），为岩溶作用CO2的丰富来源。有机碳可氧化性分级分析表明：表层土壤有机碳中易氧化态占60－85％，A层土壤较B层更易被氧化；土壤来源CO2是岩溶驱动CO2的潜在动力。从鞍部－坡地－洼地，B层土壤有机磷可氧化性由弱到强递增。野外监测表明：在干、晴气候下，岩溶土壤CO2含量高且CO2释放速率大，岩溶作用欠发育；在湿雨气候下．岩溶土壤CO2含量及CO2释放速率急剧降低，岩溶作用发育；雨后转晴．岩溶土壤CO2含量及CO2释放速率逐渐增高，岩溶作用减弱。
Organic carbon geochemistry of karst soil shows that karst soil is a large reservoir of organic carbon. Soil organic carbon content is dominated by pine knot, followed by tight knot, with the least steady state. Soil organic carbon More active (more loose state), a rich source of CO2 for karstification. The analysis of organic carbon oxidizability showed that the readily oxidizable state of surface soil organic carbon accounted for 60-85%, that of layer A was more easily oxidized than that of layer B, and that of soil-derived CO2 was the potential driving force of karst-driven CO2. From the saddle-slope-depression, the soil organic phosphorus oxidation of layer B increased from weak to strong. Field monitoring shows that under dry and sunny climatic conditions, karst soil has high CO2 content and large CO2 release rate, and karstification is underdeveloped. Karst soil CO2 content and CO2 release rate drastically decreased, karst development; clear after rain. Karst soil CO2 content and CO2 release rate gradually increased, karst weakened.