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

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

来源：Agricultural Sciences in China, 2009, 8(4): 464-471.

DOI：10.1016/S1671-2927(08)60233-3

• soil organic carbon
• grain yield
• carbon sequestration
• DNDC model

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.

• 出版日期2009-4-20
• 单位中国农业科学院农业资源与农业区划研究所