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环境因素对芦苇湿地CH4排放的影响
引用本文:黄国宏,李玉祥,陈冠雄,杨玉成,赵长伟. 环境因素对芦苇湿地CH4排放的影响[J]. 环境科学, 2001, 22(1): 1-5
作者姓名:黄国宏  李玉祥  陈冠雄  杨玉成  赵长伟
作者单位:中国科学院沈阳应用生态研究所陆地生态系统痕量物质生态过程开放实验室,沈阳110015;双台河口国家级自然保护区管理处,盘锦124010;中国科学院沈阳应用生态研究所陆地生态系统痕量物质生态过程开放实验室,沈阳110015;双台河口国家级自然保护区管理处,盘锦124010;双台河口国家级自然保护区管理处,盘锦124010
基金项目:国家自然科学重点基金资助项目(49631040)
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).

关 键 词:环境因素  芦苇湿地  CH4排放
文章编号:0250-3301(2001)01-05-0001
收稿时间:2000-03-06
修稿时间:2000-03-06

Influence of Environmental Factors on CH4 Emission from Reed Wetland
Huang Guohong,Li Yuxiang,Chen Guanxiong,Yang Yucheng and Zhao Changwei. Influence of Environmental Factors on CH4 Emission from Reed Wetland[J]. Chinese Journal of Environmental Science, 2001, 22(1): 1-5
Authors:Huang Guohong  Li Yuxiang  Chen Guanxiong  Yang Yucheng  Zhao Changwei
Affiliation:Open Laboratory of Ecological Process of Trace Substance in Terrestrial Ecosystem, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110015, China. huanggh@iae.syb.ac.cn
Abstract:
Determination of CH4 emission from reed wetland in Liaohe delta, China using closed chamber(enclosure area 0.64 m2) technique showed that average emission rate of CH4 was 520 micrograms.m-2.h-1 with significant seasonal patterns. When soil redox potential reached -110 mV, 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 0-5 cm soil layer were higher and decreased obviously with soil deepening.
Keywords:environmental factor  reed wetland  CH44 emission
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