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| 农田土壤有机碳含量对作物产量影响的模拟研究 | |
| 引用本文： | 邱建军,王立刚,李虎,唐华俊,Chang sheng Li,Eric Van Ranst.农田土壤有机碳含量对作物产量影响的模拟研究[J].中国农业科学,2009,42(1):154-161. |
| 作者姓名： | 邱建军 王立刚 李虎 唐华俊 Chang sheng Li Eric Van Ranst |
| 作者单位： | 1. 中国农业科学院农业资源与农业区划研究所/农业部资源遥感与数字农业重点开放实验室,中国北京,100081 2. Institute for the Study of Earth,Ocean and Space，University of New Hampshire，Durham，NH 03824，USA 3. Department of Geology and Soil Science(WE13)，Laboratory of Soil Science，Ghent University，Belgium |
| 基金项目： | 中央级公益性科研院所基本科研业务费专项资金资助项目，公益性行业(农业)科研专项基金，中国-比利时弗拉芒区科技合作项目 |
| 摘 要： | 【目的】探求土壤有机碳含量对作物产量的影响，以期为保障国家粮食安全和耕地持续利用与管理提供决策依据。【方法】利用农田生态系统生物地球化学模型DNDC，针对中国东北、华北、西北、中南、华东和西南6个典型农业区域，每个区域选择各自典型的种植模式和现行的农田管理措施，在各自特定的土壤和气候条件下，输入并运行模型，模拟考察在其它投入条件不变的情况下，改变土壤有机碳本底值对作物产量的影响。【结果】当土壤有机碳含量（SOC）增加1 g C?kg-1，东北地区玉米产量可增加176 kg?hm-2;华北地区夏玉米与冬小麦轮作，产量可增加约454 kg?hm-2;西北地区春玉米产量约可增加328 kg?hm-2;中南地区单季水稻产量可增加约185 kg?hm-2;华东地区双季稻产量可增加约266 kg?hm-2;西南地区水稻与冬小麦轮作产量可增加约229 kg?hm-2。【结论】在其它投入既定的条件下，全国各地区均存在通过提高耕地土壤有机碳含量来增加作物产量的潜力。保持较高水平的土壤有机碳含量对节本增效具有十分明显的作用。 |
| 关 键 词： | 土壤有机碳 粮食产量 碳固存 DNDC模型 |
| 收稿时间： | 2008-3-20 |
Modeling the Impacts of Soil Organic Carbon Content of Croplands on Crop Yields in China |
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| QIU Jian-jun,WANG Li-gang,LI Hu,TANG Hua-jun,Chang sheng Li,Eric Van Ranst.Modeling the Impacts of Soil Organic Carbon Content of Croplands on Crop Yields in China[J].Scientia Agricultura Sinica,2009,42(1):154-161. | |
| Authors: | QIU Jian-jun WANG Li-gang LI Hu TANG Hua-jun Chang sheng Li Eric Van Ranst |
| Affiliation: | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences |
| Abstract: | 【Objective】 The objective of this study was to quantify the impacts of soil organic carbon (SOC) content on grain yield of crops. 【Method】 A biogeochemical model (DNDC) was used in the study. Data on climate, soil properties, and farming management regimes of cropping systems were collected from six typical agricultural zones (Northeast, North, Northwest, Mid-South, East and Southwest regions of China, respectively) and integrated into a GIS database to support the model runs. 【Result】 According to the model, if the initial SOC content in the cropland was increased by 1 g C?kg-1, the crop yield may be increased by 176 kg?hm-2 for maize in the Northeast region, 454 kg?hm-2 for a maize and wheat rotation in the North region, 328 kg?hm-2 for maize in the Northwest region, 185 kg?hm-2 for single-rice in the Midsouth region, 266 kg?hm-2 for double- rice in East region, and 229 kg?hm-2 for rice and wheat rotation in Southwest region. 【Conclusion】There is a great potential for enhancing the crop yield by improving the SOC content in cropland in each region of China. |
| Keywords: | soil organic carbon grain yield carbon sequestration DNDC model |
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