Methane emissions from natural and drained peatlands in the Zoigê, eastern Qinghai-Tibet Plateau  

作　　者：Wenchang Zhou Lijuan Cui Yifei Wang Wei Li 

机构地区：[1]Beijing Key Laboratory of Wetland Services and Restoration,Institute of Wetland Research,Chinese Academy of Forestry,No.1 Dongxiaofu,Haidian District,Beijing 100091,People's Republic of China [2]Hubei Academy of Forestry,No.39 Fenglin Road of the Senlin Avenue,Hongshan District,Wuhan 430075,People's Republic of China

出　　处：《Journal of Forestry Research》2017年第3期539-547,共9页林业研究（英文版）

基　　金：financially supported by Grant Projects on Clean Development Mechanism in China(No.2012076);the special basic scientific research expenses from Research Institute of Forestry New Technology,Chinese Academy of Forestry(No.CAFINT2014K06)

摘　　要：Peatlands are one of the major natural sources of methane （CH4）, but the level of CH4 efflux is uncertain, especially in alpine peatlands. In this study, CH4 emission fluxes from natural and drained peatlands on the Qinghai- Tibet Plateau, southwest China, were measured from June to October in 2013 using the opaque static chamber technique and the Fast Greenhouse Gas Analyzer （DLT-100, Los Gatos Research Corp.）. CH4 emission fluxes ranged from 2.07 to 56.33 mg m^-2 h^-1 in natural peatlands and from 0.02 to 0.42 mg m^-2 h^-1 in drained peatlands. Mean CH4 emission flux was 19.13 mg m^-2 h^-1 in natural peatlands and 0.14 mg m^-2 h^-1 in drained peatlands. These results showed that drainage led to a significant decrease in CH4 emissions. CH4 emission fluxes for all sampling plots were significantly correlated with variation in water table depth for linear （R^2 = 0.453, P 〈 0.01） and exponential functions （R^2 = 0.429, P 〈 0.01）.Peatlands are one of the major natural sources of methane （CH4）, but the level of CH4 efflux is uncertain, especially in alpine peatlands. In this study, CH4 emission fluxes from natural and drained peatlands on the Qinghai- Tibet Plateau, southwest China, were measured from June to October in 2013 using the opaque static chamber technique and the Fast Greenhouse Gas Analyzer （DLT-100, Los Gatos Research Corp.）. CH4 emission fluxes ranged from 2.07 to 56.33 mg m^-2 h^-1 in natural peatlands and from 0.02 to 0.42 mg m^-2 h^-1 in drained peatlands. Mean CH4 emission flux was 19.13 mg m^-2 h^-1 in natural peatlands and 0.14 mg m^-2 h^-1 in drained peatlands. These results showed that drainage led to a significant decrease in CH4 emissions. CH4 emission fluxes for all sampling plots were significantly correlated with variation in water table depth for linear （R^2 = 0.453, P 〈 0.01） and exponential functions （R^2 = 0.429, P 〈 0.01）.

关 键 词：Drainage CH4 emission PEATLAND Zoige PLATEAU 

分 类 号：X142[环境科学与工程—环境科学] X51