Simulation of Soil Organic Carbon Dynamics in Chinese Rice Paddies from 1980 to 2000

ZHANG Wen; YU Yong-Qiang; SUN Wen-Juan; HUANG Yao

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Simulation of Soil Organic Carbon Dynamics in Chinese Rice Paddies from 1980 to 2000

机译：1980-2000年中国稻田土壤有机碳动态模拟。

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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 ± 170kg 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.

机译：通过将耦合的生物物理模型与GIS数据库联系起来，对1980年至2000年中国稻田土壤有机碳（SOC）的变化进行了模拟。耦合模型由两个子模型组成，包括用于模拟净初级生产力和残留量保留的Crop-C和用于计算SOC周转率的Soil-C。 GIS数据库包括分辨率为10 km×10 km的气候，土壤和农业活动参数。模型模拟表明，从1980年到2000年，覆盖22.6 Mha的中国稻田螯合了大量的C，大约0.15±0.07 PgC。年螯合速率从1980年的-180±45 kg C ha-1 year-1急剧增加到440在1989年达到±170 kg C ha-1 year-1的稳定水平。此后直到1994年，稳定的螯合速率达到460±170 kg C ha-1 year-1，此后一直下降。在过去的20年中，大约84％的中国稻田吸收了碳，而15％的碳损失和1％的碳平衡。中国东部，南部和中部发生了大量的SOC封存，而中国东北和西南部的某些区域SOC则略有下降。

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《土壤圈（英文版）》 |2007年第1期|1-10|共10页
作者
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);

State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China);

State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China);

State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
Chinese rice paddy; GIS; model estimates; SOC;

机译：稻田;GIS;模型估计;SOC;

Simulation of Soil Organic Carbon Dynamics in Chinese Rice Paddies from 1980 to 2000

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