| Cite this article: | 毕文通.基于DNDC模型的稻田氨挥发模拟及减排模式[J].灌溉排水学报,0,():-. |
| biwentong.基于DNDC模型的稻田氨挥发模拟及减排模式[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Simulation and emission reduction model of ammonia volatilization from paddy field based on DNDC model |
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biwentong
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Nanjing Hydraulic Research Institute
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| Abstract: |
| Abstract:【Objective】The objective is to optimize the water and carbon control mode for ammonia volatilization and emission reduction in paddy field.【Method】A simulation model for ammonia volatilization process in paddy field controlled by water and biochar was built and validated by DNDC model based on field measured data, and the characteristics of ammonia volatilization loss in paddy field affected by different irrigation modes and biochar addition levels were analyzed. Finally, the water and carbon control mode for ammonia volatilization and emission reduction in paddy field was selected.【Result】The results showed that the relative errors of simulation values and measured values of ammonia volatilization in model paddy field after tillering fertilizer, one week after spike fertilizer and rice season were within <8%, which could better simulate and control the characteristics of ammonia volatilization loss in paddy field after applying different levels of biochar. With the increase of biochar addition, ammonia volatilization loss of paddy fields under the same irrigation treatment showed a small decreasing trend. At the same level of biochar addition, ammonia volatilization loss in paddy field decreased slightly with the decrease of irrigation limit. Irrigation water treatment and application of biochar significantly affect ammonia volatilization loss in paddy field. Irrigation water treatment is the main influencing factor and has a stronger effect on ammonia volatilization in paddy field than application of biochar.【Conclusion】I3B11 treatment is the optimal mode for controlling water and carbon in rice fields,ammonia volatilization emission reduction in paddy field can be effectively achieved by properly increasing biochar application on the basis of lowering the lower irrigation limit of paddy field. |
| Key words: DNDC; ammonia volatilization; biochar; controlled irrigation; paddy fields. |
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