| 路南石林地区土壤呼吸及碳稳定同位素日动态特征 |
| |
| 引用本文： | 曹建华,宋林华,姜光辉,谢运球,游省易.路南石林地区土壤呼吸及碳稳定同位素日动态特征[J].中国岩溶,2005,24(1):23-27. |
| |
| 作者姓名： | 曹建华 宋林华 姜光辉 谢运球 游省易 |
| |
| 作者单位： | 1中国地质科学院岩溶地质研究所、国土资源部岩溶动力学重点实验室 2.中国科学院自然资源与地理科学研究所 |
| |
| 基金项目： | 国家自然科学基金，国家石林科学基金 |
| |
| 摘 要： | 采用碱吸收法,于2002年4月13- 16日(晴)、8月21- 24日(晴)对路南石林地区次生草地及柏树林下的土壤呼吸进行了野外监测,同时收集其碳稳定同位素样品进行室内质谱仪分析。结果显示: 土壤呼吸速率日动态特征表现为夜间高于白天, 8月份土壤呼吸速率高于4月份; 4月份的草地系统土壤呼吸的碳稳定同位素日平均值偏轻,而柏树林系统土壤呼吸的碳稳定同位素日平均值则是8月份的偏轻;土壤呼吸与其碳稳定同位素值成负相关,草地系统的相关程度, 4月份的较8月份的高;柏树林系统的相关程度,则是8月份较4月份的高。这揭示了土壤呼吸及其碳稳定同位素交换对环境变化的敏感性,且不同的生物系统有不同的表现特征。
|
| 关 键 词： | 岩溶环境 土壤呼吸 碳稳定同位素 路南石林 |
| 文章编号： | 1001-4810(2005)01-0023-05 |
DIURNAL DYNAMICS OF SOIL RESPIRATION AND CARBON STABLE ISOTOPE IN LUNAN STONE FOREST, YUNNAN PROVINCE |
| |
| CAO Jian-hu,SONG Lin-hu,JIANG Guang-hui,XIE Yun-qiu and YOU Sheng-yi.DIURNAL DYNAMICS OF SOIL RESPIRATION AND CARBON STABLE ISOTOPE IN LUNAN STONE FOREST, YUNNAN PROVINCE[J].Carsologica Sinica,2005,24(1):23-27. |
| |
| Authors: | CAO Jian-hu SONG Lin-hu JIANG Guang-hui XIE Yun-qiu and YOU Sheng-yi |
| |
| Institution: | 1.Institute of Karst Geology, CAGS; Key Laboratory of Karst Dynamics, MLR 2.Institute of Natural Resources and Geography, CAS |
| |
| Abstract: | With the alkaline-sorption method, the diurnal changes of soil respiration were monitored in Lunan Stone Forest, Yunnan province. In the meanwhile, the carbon stable isotope (CSI) samples were collected and taken to laboratory, the CSI values were examined by the mass spectrometer (MAT-251). The fine days from 13 to 16, April and 21 to 24, August were selected as the monitoring period. The field works were carried out in grass and cypress community. The results show that the rate of soil respiration at daytime is lower than that at night, and it is higher in August than that April; the diurnal average value of carbon stable isotope is relative lighter in April in grass community but heavier in April in cypress community. The soil respiration keeps the negative correlation with its carbon stable isotope value, i.e. it is larger in April in grass community but larger in August in cypress community. This suggests the changes of soil respiration and carbon stable isotope are sensitive to surrounding environments. Moreover, the difference of carbon cycle and isotope exchange exists in cypress community and grass community. |
| |
| Keywords: | Karst environment Soil respiration Carbon stable isotope Lunan Stone Forest |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《中国岩溶》浏览原始摘要信息 |
| 点击此处可从《中国岩溶》下载免费的PDF全文 |
|
