| 过去20年中国稻田土壤有机碳变化的模拟研究 |
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| 引用本文： | ZHANG Wen,YU Yong-Qiang,SUN Wen-Juan,HUANG Yao. 过去20年中国稻田土壤有机碳变化的模拟研究[J]. 土壤圈, 2007, 17(1): 1-10. DOI: 10.1016/S1002-0160(07)60001-0 |
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| 作者姓名： | ZHANG Wen YU Yong-Qiang SUN Wen-Juan HUANG Yao |
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| 作者单位： | State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China). E-mail: zhangween@yahoo.com.cn;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China). E-mail: zhangween@yahoo.com.cn;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China). E-mail: zhangween@yahoo.com.cn;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China). E-mail: zhangween@yahoo.com.cn |
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| 基金项目： | 中国科学院知识创新工程项目;国家自然科学基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | Changes in soil organic carbon (SOC) of rice paddies in China were simulated from 1980 to 2000 by linking a coupled bio-physical model to GIS database. The coupled model consists of two sub-models including Crop-C for simulating net primary productivity and hence residue retention and Soil-C for computing the turnover rates of SOC. The GIS database included parameters of climate, soils and agricultural activities with the resolution of 10 km × 10 km. Model simulation indicated that Chinese rice paddies covering 22.6 Mha sequestrated a considerable amount of C, about 0.15 ± 0.07 Pg C from 1980 to 2000. Annual sequestration rate increased sharply from -180 ± 45 kg C ha-1 year-1 in 1980 to 440 ± 170 kg C ha-1 year-1 in 1989. Thereafter, a steady sequestration rate of 460 ± 170 kg C ha-1 year-1 occurred till 1994 and declined since then. Approximately 84% of the Chinese rice paddies sequestrated carbon, while 15% lost carbon and 1% kept balance over the 20 years. Great SOC sequestration occurred in eastern, southern and central China, while a slight decline of SOC existed in some regions of northeastern and southwestern China.
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| 关 键 词： | Chinese rice paddy GIS model estimates SOC |
| 收稿时间： | 2006-07-26 |
Simulation of soil organic carbon dynamics in Chinese rice paddies from 1980 to 2000 |
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| ZHANG Wen,YU Yong-Qiang,SUN Wen-Juan and HUANG Yao. Simulation of soil organic carbon dynamics in Chinese rice paddies from 1980 to 2000[J]. Pedosphere, 2007, 17(1): 1-10. DOI: 10.1016/S1002-0160(07)60001-0 |
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| Authors: | ZHANG Wen YU Yong-Qiang SUN Wen-Juan HUANG Yao |
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| Affiliation: | State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China). E-mail: zhangween@yahoo.com.cn;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China). E-mail: zhangween@yahoo.com.cn;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China). E-mail: zhangween@yahoo.com.cn;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China). E-mail: zhangween@yahoo.com.cn |
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| Abstract: | Changes in soil organic carbon (SOC) of rice paddies in China were simulated from 1980 to 2000 by linking a coupled bio-physical model to GIS database. The coupled model consists of two sub-models including Crop-C for simulating net primary productivity and hence residue retention and Soil-C for computing the turnover rates of SOC. The GIS database included parameters of climate, soils and agricultural activities with the resolution of 10 km × 10 km. Model simulation indicated that Chinese rice paddies covering 22.6 Mha sequestrated a considerable amount of C, about 0.15 ± 0.07 Pg C from 1980 to 2000. Annual sequestration rate increased sharply from -180 ± 45 kg C ha-1 year-1 in 1980 to 440 ± 170 kg C ha-1 year-1 in 1989. Thereafter, a steady sequestration rate of 460 ± 170 kg C ha-1 year-1 occurred till 1994 and declined since then. Approximately 84% of the Chinese rice paddies sequestrated carbon, while 15% lost carbon and 1% kept balance over the 20 years. Great SOC sequestration occurred in eastern, southern and central China, while a slight decline of SOC existed in some regions of northeastern and southwestern China. |
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| Keywords: | Chinese rice paddy GIS model estimates SOC |
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