Modeling the Impacts of Soil Organic Carbon Content of Croplands on Crop Yields in China

文献类型： 外文期刊

第一作者： Qiu Jian-jun

作者： Qiu Jian-jun;Wang Li-gang;Li Hu;Tang Hua-jun;Li Chang-sheng;Van Ranst, Eric

作者机构：

关键词： soil organic carbon;grain yield;carbon sequestration;DNDC model

期刊名称：AGRICULTURAL SCIENCES IN CHINA （ 影响因子：0.82； 五年影响因子：0.997 ）

ISSN： 1671-2927

年卷期： 2009 年 8 卷 4 期

页码：

收录情况： SCI

摘要： This study quantified the impacts of soil organic carbon (SOC) content on the grain yield of crops using a biogeochemical model (DNDC, denitrification-decomposition). 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. 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 ha-(1) for maize in the northeast region, 454 kg ha-(1) for a maize-wheat rotation in the north region, 328 kg ha-(1) for maize in the northwest region, 185 kg ha-(1) for single-rice in the mid-south region, 266 kg ha-(1) for double-rice in east region, and 229 kg ha-(1) for rice and wheat rotation in southwest region. There is a great potential for enhancing the crop yield by improving the SOC content in each region of China.

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