| 环境因素对芦苇湿地CH4排放的影响 |
| 摘要点击 1989 全文点击 2344 投稿时间：2000-03-06 |
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| 中文关键词 环境因素 芦苇湿地 CH4排放 |
| 英文关键词 environmental factor reed wetland CH44 emission |
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| 中文摘要 |
| 用封闭式箱法对辽河三角洲芦苇湿地温室气体CH4 排放进行了长期观测 .结果表明 ,CH4 排放有明显的季节变化规律 ,平均通量为 520μg·m-2·h-1.土壤产CH4 活性主要发生在0～5cm土层中 ,并随土层深度的增加而显著下降 .CH4排放受环境因素影响很大 ,土壤氧化还原电位在 -110mV时就有CH4排放 ,其排放量随氧化还原电位的下降而增加 .另外 ,随着淹水深度的增加 ,CH4 排放反而减少 .在测定期内 ,CH4 排放与温度呈明显的正相关 (R2=0196,n=21,P<0.05). |
| 英文摘要 |
| Determination of CH4 emission from reed wetland in Liaohe delta,China using closed chamber(enclosure area 0.64m2)technique showed that average emission rate of CH4 was 520μg·m-2·h-1with significant seasonal patterns.When soil redox potential reached-110mV,CH4 occured and increased with its decrease.CH4 emission was also influenced by water management and reduced with deep water cover.During the period of measurement,there was positive relation between temperature and CH4 flux( R2=0.196,n=21,P<0.05 ).In addition,the experimental result also showed that the methanogenic activites in 0～5cm soil layer were higher and decreased obviously with soil deepening. |
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