文献类型：期刊文献

英文题名：Influencing Factors of Methane Emission Dynamics at Different Water Depths in Hangzhou Bay Reed Wetland, China

作者：Sho, Xuexin[1] Sheng, Xuancai[1] Wu, Ming[1] Wu, Hao[1] Ning, Xiao[1]

第一作者：Sho, Xuexin

通信作者：Sho, XX[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Wetland Ecosyst Res Stn Hangzhou Bay, Hangzhou 311400, Zhejiang, Peoples R China

年份：2017

卷号：36

期号：5

起止页码：1301-1307

外文期刊名：ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY

收录：;EI(收录号：20172703878562);Scopus(收录号：2-s2.0-85021406398);WOS:【SCI-EXPANDED(收录号:WOS:000414284700005)】；

基金：This study was supported by the Fundamental Research Funds for the Central Nonprofit Research Institution (CAFYBB2014MA002) and the Special Fund for Forest Scientific Research in the Public Welfare (201404210).

语种：英文

外文关键词：Phragmites australis; CH4 emissions; coastal wetland; seasonal dynamics; temperature

摘要：Water depth (WD) influences wetland methane (CH4) emissions by affecting plant growth and the physical and chemical properties of soil. We studied the factors influencing CH4 emission dynamics at different WD in reclaimed reed wetland in Hangzhou Bay, China. The annual average WD was set as WD0 (0 cm), WD1 (10 cm), WD2 (20 cm), and WD3 (35 cm). The transparent chamber-gas chromatography method was used to determine CH4 fluxes during the growing season. Results showed that the average CH4 flux was 7.03 mg m(-2) h(-1), and that CH4 fluxes under all 4 WDs presented as a CH4 source. CH4 emissions of the reed wetland showed obvious seasonal changes; summer was the peak period for CH4 emissions. In a vigorous growth period of reeds, the CH4 flux gradually increased as WD increased. However, in early and late growth periods of reed, CH4 flux first increased (WD0 < WD1 < WD2) then decreased (WD2 > WD3) as WD increased. Correlation analysis showed that at the 4 WDs, CH4 flux was significantly, positively correlated with air temperature, soil temperature, and aboveground biomass of reeds, and were highly significantly positively correlated with water temperature. In addition, at WD0, CH4 flux also showed a significant, positive correlation with soil organic carbon content in the 0-5 and 5-10 cm soil layers, and was significantly negatively correlated with soil water content. Hence, WD significantly influenced wetland CH4 emissions. Temperature and biomass were major influencing factors of CH4 emission in reed wetland at different WDs. (C) 2017 American Institute of Chemical Engineers