桂林盘龙洞土壤CO_2释放速率的分布状况和变化规律

Earth and Environment(2011)

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Abstract
以桂林盘龙洞岩溶实验场为例,选择岩溶洼地里的坡地灌木丛和洼地灌木丛2个样地,通过长期定时监测土壤CO2释放速率的季节变化、空间分布规律以及日动态变化。得知:⑴无论是坡地还是洼地,春季和夏季时土壤CO2释放速率表层土大于深层土,秋季和冬季时深层土大于表层土,且坡地大于洼地;⑵土壤CO2的释放速率具有明显的季节性变化特征,夏秋季(6-9月)土壤CO2释放速率是其它时期的1-3倍,并显示与气温、土壤含水率和生物活动密切相关。
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Key words
emission rate,Panlong cava,carbon cycle,Guilin,soil CO2
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