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地下水位和土壤温度对若尔盖泥炭地CH4排放的影响

高燕 刘高慧 杜乐山 胡理乐 康冰

高燕, 刘高慧, 杜乐山, 胡理乐, 康冰. 地下水位和土壤温度对若尔盖泥炭地CH4排放的影响[J]. 环境科学研究, 2016, 29(4): 516-521.
引用本文: 高燕, 刘高慧, 杜乐山, 胡理乐, 康冰. 地下水位和土壤温度对若尔盖泥炭地CH4排放的影响[J]. 环境科学研究, 2016, 29(4): 516-521.
GAO Yan, LIU Gaohui, DU Leshan, HU Lile, KANG Bing. Effects of Water Table Level and Soil Temperature on CH4 Emissions in Zoigê Peatlands[J]. Research of Environmental Sciences, 2016, 29(4): 516-521.
Citation: GAO Yan, LIU Gaohui, DU Leshan, HU Lile, KANG Bing. Effects of Water Table Level and Soil Temperature on CH4 Emissions in Zoigê Peatlands[J]. Research of Environmental Sciences, 2016, 29(4): 516-521.

地下水位和土壤温度对若尔盖泥炭地CH4排放的影响

基金项目: 国家自然科学基金项目(41103041)

Effects of Water Table Level and Soil Temperature on CH4 Emissions in Zoigê Peatlands

  • 摘要: 为了深入分析环境因子对湿地CH4排放产生的影响,利用中型试验生态系对若尔盖典型泥炭地开展地下水位和土壤温度控制试验,比较不同条件下泥炭地2012年生长季(5—10月)CH4排放通量的月变化情况. 结果表明:高水位(土壤表面0 cm)下CH4排放通量最高,中水位(地表以下10 cm)下次之,低水位(地表以下20 cm)下最低;其中,10月CH4排放通量变化不明显,不同地下水位下泥炭地的CH4排放通量均在7月达到最大值,并且均呈明显的单峰曲线,高、中、低地下水位下CH4排放通量平均值分别为6.263 3、4.754 4和3.949 8 mg/(m2·h). 而且,在一定温度范围内,不同地下水位条件下CH4排放通量随土壤温度的升高均呈指数式增长. 其中,高水位下CH4排放通量对土壤温度变化最为敏感,中水位下次之,低水位下相对最不敏感. 研究显示,若尔盖泥炭地CH4排放通量表现出明显的季节性变化差异,并且季节性升温和涨水均会促进CH4排放通量的增加.

     

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出版历程
  • 收稿日期:  2015-09-25
  • 修回日期:  2016-01-15
  • 刊出日期:  2016-04-25

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