| 农田生态系统N2O排放的数值模拟研究 |
| 摘要点击 1939 全文点击 1407 投稿时间：2001-07-31 修订日期：2002-04-18 |
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| 中文关键词 农田生态系统 N2O排放 数值模拟 |
| 英文关键词 agroecosystem N2O emissions numerical simulation |
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| 中文摘要 |
| 综合大气化学等多学科最新研究进展,建立了农田N2O排放数值模式,模式较好地模拟了农田生态系统中N2O排放过程.利用模式分析了气象因子对N2O排放影响.结果表明:苏州稻田N2O排放量与生长期平均气温存在显著正相关,与总辐射和降水量相关不明显;功率谱分析表明N2O排放量存在7～9年的变化周期,与平均温度变化周期比较接近.模拟气候变化对N2O排放的可能影响表明:气温比目前升高1℃,苏州稻田N2O排放量将平均增加4.5%. |
| 英文摘要 |
| A numerical model for simulating N2O emissions in agroecosystem was established. Validation of the model with the observed data showed that the model simulated the process of N2O emissions in fields fairly well. The numerical analysis showed that the N2O emissions were interrelated well with average temperature during rice growth periods. Analysis of N2O emissions and meteorological factors by using power spectrum found that the change of N2O emissions had 7～9 year cycles. Sensitivity test showed that the N2O emission increased with temperature enhancement. |
