| 氧化亚氮在森林和草原中的地-气交换 |
| 摘要点击 1665 全文点击 2657 投稿时间：1997-01-20 |
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| 中文关键词 N2O O3 排放通量 源 汇 地－气交换 |
| 英文关键词 N2O O3 emission flux source sink exchange between atmosphere and territory |
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| 中文摘要 |
| 采用箱式法,建立了一套完整的测定森林草原土壤N2O排放方法,并对我国北方的自然环境中N2O排放作了观测,得出其最大排放通量为23μg/(m2·h).并发现森林草原土壤当温度低于15℃时对N2O有吸收行为,其最大吸收通量为18.984μg/(m2·h)。 |
| 英文摘要 |
| Nitrous oxide(N2O)is not only a major greenhouse gas in the atmosphere,but also an important matter that can cause ozone depletion.The emission sources of N2O are consisted by a large number uncertain minor sources.Besides agricultural soils,grassland and forest soils are also the major natural source of N2O emissions. In this paper,a completed method to determine the N2O emission flux from forest and grassland soil by a closed chamber installation was set up,and the N2O emission at the natural environment was measured in northern China. The maximum value of N2O emissions from forest and grassland soil is about 23μg/(m2·h).A high rate of N2O loss is observed when the temperature is lower than 15℃. The maximum value of N2O negative emissions as high as 18.984 μg/(m2·h)has been measured. |
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