闽江口鱼虾混养塘水-气界面温室气体通量及主要影响因子  

Greenhouse gases fluxes at water-air interface of aquaculture ponds and influencing factors in the Min River estuary

作　　者：杨平[1] 仝川[1] 何清华[1] 黄佳芳[1] 

机构地区：[1]福建师范大学亚热带湿地研究中心,湿润亚热带生态-地理过程省部共建教育部重点实验室,福建师范大学地理科学学院,福州350007

出　　处：《环境科学学报》2013年第5期1493-1503,共11页Acta Scientiae Circumstantiae

基　　金：国家重点基础研究计划(973)项目(No.2013CB430401);国家自然科学基金项目(No.41071148);福建师范大学地理科学学院研究生科技创新项目~~

摘　　要：以闽江口区鳝鱼滩湿地分布的鱼虾混合养殖塘为研究对象,于2011年9月—2012年1月,采用悬浮箱-气相色谱法对养殖塘白天水-气界面CO2、CH4和N2O的通量进行观测,并同步测定地面气象及养殖塘表层水的物理、生物和化学指标.结果表明,观测期间养殖塘水-气界面CO2、CH4和N2O3种温室气体通量变化范围分别为-22.15～74.79mg·m-2·h-1、0.08～6.62mg·m-2·h-1和-9.82～47.16μg·m-2·h-1,平均值分别为21.04、3.15mg·m-2·h-1和16.58μg·m-2·h-1,整体均表现为大气中3种温室气体的排放源.养殖塘水-气界面3种温室气体通量特征受到人类管理行为(水质管理和饵料投放等)、养殖鱼虾的觅食和代谢过程及气象因子和水体理化性质等诸多因素的共同影响.Variations of CO2, CH4 and N2O fluxes at water-air interface in the daytime were determined using a floating chamber- gas chromatography method in a mixed culture pond of fish and shrimp from September 2011 to January 2012 in the Shanyutan Wetland of the Min River estuary, southeast China. Meanwhile, the meteorological indicators in ground surface and the physical, chemical and biological indicators of surface water were also measured. The fluxes of CO2, CH4 and N2O at the water-air interface showed an obvious temporal variations during observation. CO2, CH4 and N2O fluxes ranged from -22.15 to 74.79 mg·m^-2·h^-1, 0.08 to 6.62 mg·m^-2·h^-1 and -9.82 to 47.16 μg·m^-2·h^-1, respectively, with the average values of 21.04, 3.15 and 16.58 μg·m-2·h-1, respectively. The mixed culture pond of fish and shrimp functioned as a source of CO2, CH4 and N2O. The greenhouse gases fluxes at water-air interface were influenced by many factors, including human activities （water quality management and bait launch）, growth of fish and shrimp, meteorological factors, and physical and chemical properties of water.

关 键 词：CO2 CH4 N2O 水-气界面 通量 鱼虾混养塘 闽江口 

分 类 号：X83[环境科学与工程—环境工程]