| 土壤碳作为湿润亚热带表层岩溶作用的动力机制:系统碳库及碳转移特征 |
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| 引用本文： | 潘根兴,曹建华,何师意,陶于祥,孙玉华,滕永忠.土壤碳作为湿润亚热带表层岩溶作用的动力机制:系统碳库及碳转移特征[J].南京农业大学学报,1999,22(3):1. |
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| 作者姓名： | 潘根兴 曹建华 何师意 陶于祥 孙玉华 滕永忠 |
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| 作者单位： | 1. 南京农业大学资源与环境科学学院,南京,210095
2. 桂林岩溶地质研究所及岩溶动力学开放实验室,桂林,541004 |
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| 基金项目： | 国家自然科学基金，岩溶动力学开放实验室资助 |
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| 摘 要： | 以桂林丫吉村岩溶实验场为例， 分析了表层带岩溶系统中碳库组成， 测定了各碳库的碳稳定性同位素丰度， 表明土壤碳是系统中最大的碳库， 生物的 Ｃ Ｏ２ 吸收同化与土壤有机质分解导致的土壤 Ｃ Ｏ２ 释放是系统中主导的碳流通过程， 系统活动态碳组分主要由土壤碳贡献， 从而揭示了土壤碳对表层岩溶作用的动力机制。
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| 关 键 词： | 表层岩溶系统 碳库 碳转移 碳稳定性同位素 土壤碳 |
| 修稿时间： | 1998-11-23 |
Soil carbon as dynamic mechanism for epikarstification in humid subtropical region: Evidence of carbon reservoirs and transfer in the system |
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| Pan Genxing,Cao Jianhua,He Shiyi,Tao Yuxiang,Shun Yuhua,Teng Yongzhong.Soil carbon as dynamic mechanism for epikarstification in humid subtropical region: Evidence of carbon reservoirs and transfer in the system[J].Journal of Nanjing Agricultural University,1999,22(3):1. |
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| Authors: | Pan Genxing Cao Jianhua He Shiyi Tao Yuxiang Shun Yuhua Teng Yongzhong |
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| Abstract: | Taking an example of Guilin Yaji Karst Experiment Site,carbon reservoirs and their stable isotope abundance were analysed of the epikarst system,and CO 2 concentration in air of plant system and its relation to soil respiration CO 2 emmission were monitored.The results showed that soil carbon was the biggest carbon reservoir in the system,plant CO 2 absorption from air and soil CO 2 respiration emmission were the predominant process of carbon fluxes in the system.The labile carbon forms mainly expressed as CO 2 in the system was dominantly derived from soil carbon.Consequently,the dynamic mechanism of soil carbon for epikarst system in humid subtropical karst region was revealled. |
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| Keywords: | carbon reservoir carbon stable isotope carbon transfer epikarst system soil carbon |
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