| 不同耕作措施下江苏省稻田土壤固碳潜力的模拟研究 |
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| 引用本文： | 徐胜祥,史学正,赵永存,于东升,王世航,辛景树,任 意.不同耕作措施下江苏省稻田土壤固碳潜力的模拟研究[J].土壤,2012,44(2):253-259. |
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| 作者姓名： | 徐胜祥 史学正 赵永存 于东升 王世航 辛景树 任 意 |
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| 作者单位： | 1. 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京210008;中国科学院研究生院,北京100049
2. 全国农业技术推广服务中心,北京,100026 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目（KZCX2-YW-Q1-07和KZCX2-EW-QN404）、中国科学院战略性先导科技专项项目（XDA05050509）和国家重点基础研究发展计划（973计划）项目（2010CB950702）资助 |
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| 摘 要： | 以江苏省稻田为对象，整合DNDC和1:100万土壤数据库，以土壤图斑为基本模拟单元，定量估算少耕、免耕和综合措施（少耕 + 30% 秸秆还田）下江苏省稻田土壤的固碳潜力（0 ~ 30 cm）。模拟结果表明：相对于传统耕作，采用少耕、免耕和少耕 + 30% 秸秆还田均可明显地增加稻田SOC的积累，其在2009—2050年间的固碳潜力分别为24.5、47.7和43.8 Tg。免耕和少耕 + 30% 秸秆还田条件下稻田固碳速率大约是少耕的2倍。结合实际情况，少耕 + 30% 秸秆还田将是最可行的固碳措施之一。
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| 关 键 词： | DNDC模型 土壤有机碳 水稻土 固碳潜力 江苏省 |
Simulation of carbon sequestration potential from paddy fields in Jiangsu Province under different tillage practices |
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| XU Sheng-xiang,SHI Xue-zheng,ZHAO Yong-cun,YU Dong-sheng,WANG Shi-hang,XIN Jing-shu,REN Yi.Simulation of carbon sequestration potential from paddy fields in Jiangsu Province under different tillage practices[J].Soils,2012,44(2):253-259. |
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| Authors: | XU Sheng-xiang SHI Xue-zheng ZHAO Yong-cun YU Dong-sheng WANG Shi-hang XIN Jing-shu REN Yi |
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| Institution: | 1 State Key Laboratory of Soil and Sustainable Agriculture(Institute of Soil Science,Chinese Academy of Sciences),Nanjing 210008,China, 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China, 3 National Center for Agriculture Technology Extension and Service,Beijing 100026,China) |
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| Abstract: | In this study a soil polygon-based modeling method was developed by integrating DNDC with a 1:1,000,000 soil database to quantify C sequestration potential from paddy fields in Jiangsu Province under reduced tillage, no-tillage, and combined tillage (i.e., reduced tillage and increasing crop residue return to 30%). The results indicated that C sequestration potential under modeled tillage practices significantly increased compared to the conventional tillage, and was estimated to be 24.5, 47.7 and 43.8 Tg between 2009 and 2050 under reduced tillage, no-tillage, and combined tillage, respectively. The C sequestration rate under no-tillage, and combined tillage was nearly 2 times higher than under reduced tillage. In view of actual situation, the combined tillage will be one of the most realistic tillage of C sequestration for paddy fields in Jiangsu Province. |
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| Keywords: | DNDC model Soil organic carbon Paddy soils Carbon sequestration potential Jiangsu Province |
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