桂林丫吉村岩溶试验场岩溶土壤碳转移与水排碳作用

被引：15

作者：

潘根兴

曹建华

何师意

徐胜友

陶于祥

滕永忠

机构：

[1] 南京农业大学农业资源与生态环境研究所,南京农业大学农业资源与生态环境研究所,国土资源部岩溶动力学开放实验室,国土资源部岩溶动力学开放实验室,南京农业大学农业资源与生态环境研究所,南京农业大学农业资源与生态环境研究所南京,南京国土资源部岩溶动力学开放实验室,桂林,桂林,桂林,南京,南京

来源：

自然科学进展 | 2001年 / 07期

关键词：

岩溶水系统; 排碳作用; 大气CO2汇效应; 土壤有机碳; 碳转移;

D O I：

暂无

中图分类号：

P595 [元素地球化学];

学科分类号：

摘要：

对桂林丫吉村岩溶试验场1号洼地出口泉进行了岩溶水HCO3-输出碳的年内变化监测和模拟灰岩土壤系统水排碳作用的实验分析,野外土壤剖面中CO2浓度和排放强度变化的观测,土壤碳和岩溶水无机碳的δ13C大测定,提出土壤碳转移是岩溶水排碳作用的物理基础,因而其所表现的对大气CO2汇效应实际上是生物作用下土壤有机碳分解释放向系统外的排出.供试系统的汇效应达到21～26 tC/（km2.a）,系统在春、夏、秋和冬季的汇、源效应的强度比分别为0.077,0.099,0.002,0.004.

引用

页码：34 / 39

页数：6

共 28 条

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