| 刊名 | Agricultural Biotechnology |
| 作者 | Peng ZHANG1,2, Hanxiao FENG2,3, Liming LAI1, 2*, Haiwei WANG1,2, Yang YANG1,2 |
| 作者单位 | 1. Department of Agronomy, Hetao College, Bayannur 015000, China; 2. Research Center of Soil Resource Comprehensive Utilization and Ecological Environment in Western Inner Mongolia, Hetao College, Bayannur 015000, China; 3. Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China |
| DOI | DOI:10.19759/j.cnki.2164-4993.2025.03.014 |
| 年份 | 2025 |
| 刊期 | 3 |
| 页码 | 56-63 |
| 关键词 | Soil CO2 flux; Nitrogen fertilization rate; Sunflower; Washing salts by irrigation; Rising temperature; DAYCENT model; Hetao Irrigation District |
| 摘要 | A growing global demand exists to formulate plans to lessen the greenhouse gas emissions produced by agricultural activities. The purpose of this study was to uncovered the changes in soil CO2 fluxes under varying scenarios including nitrogen fertilization rates, irrigation rates, and air temperatures in the Hetao Irrigation District (HID) over the 38-year period. DAYCENT model was used to predict carbon dioxide (CO2) fluxes from cultivated soils in the HID, Inner Mongolia from 2023 to 2060 (the year of achieving the “carbon neutrality” goal) in this study. Results showed that mean soil CO2 fluxes in the sunflower field (1 035.13 g/(m².yr)) were significantly lower than those in the maize field (1 405.54 g/(m².yr)). An increase in nitrogen fertilization rate led to a significant escalation in soil CO2 fluxes. Moreover, elevating irrigation rates for washing salts by irrigation (WSBI) diminished soil CO2 fluxes in the sunflower field while amplifying them in the maize field. A rise in air temperature resulted in an increase in soil CO2 fluxes from the maize field, with annual increases observed, but a reduction in soil CO2 fluxes from the sunflower field. The sunflower fields in the HID have a more substantial advantage than the corn fields in mitigating soil CO2 emissions. |
