کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4490469 | 1317771 | 2009 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Modeling the Impacts of Soil Organic Carbon Content of Croplands on Crop Yields in China Modeling the Impacts of Soil Organic Carbon Content of Croplands on Crop Yields in China](/preview/png/4490469.png)
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.
Journal: Agricultural Sciences in China - Volume 8, Issue 4, April 2009, Pages 464-471