通过2010-2011年的监测建立了桂林盘龙洞坡地和洼地不同深度土壤CO2体积分数的季节性变化.监测土壤CO2体积分数空间上变化为:坡地80cm＞50cm＞30cm；洼地80cm ＞100cm ＞50cm＞30cm.监测土壤CO2体积分数时间上变化为2010年7月和2011年6月未CO2体积分数达到最高值,2010到2011年冬季为土壤CO2达到最低值.由于受到大气降水量急剧减少的影响2011年土壤CO2体积分数整体比2010年低.显示大气降水量也是影响土壤CO2体积分数的重要环境因素.为我国固碳减排科学的选择时间和空间提供有力的依据.%This study monitors Guilin Panlong cave slope and depression of different depth soil CO2 concentration season fromrn2010 to 2011 years. Monitoring of slope soil CO2 concentration space change as: 80 cm > 50 cm > 30 cm; depressions: 80 cm > 100rncm >50 cm > 30 cm. Monitoring of soil CO; concentration reached a maximum value in July, 2010 and June, 2011. And soil CO2rncontent value reaches a minimum value in winter of 2010 and 2011. Soil CO2 concentration in 2011 is less than 2010. Because ofrnatmospheric precipitation in 2011 is less man 2010. This result shows soil CO2 concentration also affected by atmosphericrnprecipitation.
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