嵌套式静态采样箱的设计及其在稻田甲烷通量监测中的应用  

Design for Nested Sampling Chamber and Its Application in Methane Flux Monitoring of Paddy Field

作　　者：刘孝富[1,2] 王文杰[2] 王维[2] 蒋卫国[1] 刘海江[3] 毕军平 温月雷[5] 陈强[1] 

机构地区：[1]北京师范大学环境演变与自然灾害教育部重点实验室,北京100875 [2]中国环境科学研究院环境信息研究所,北京100012 [3]中国环境监测总站生态室,北京100012 [4]湖南省环境监测中心站,湖南长沙410014 [5]东北师范大学城市与环境科学学院,吉林长春130024

出　　处：《环境工程技术学报》2011年第6期538-543,共6页Journal of Environmental Engineering Technology

基　　金：国家环境保护公益性行业科研专项(200909113);国家科技支撑计划项目(2008BAC34B01);环境模拟与污染控制国家重点联合实验室(北京师范大学)开放课题(10K03ESPCN)

摘　　要：通过总结得出温室气体静态采样箱设计的基本准则,并以洞庭湖不同湿地类型甲烷排放通量观测为出发点,设计了嵌套式采样箱。该采样箱的优势在于高度和体积可调节,运输和不使用时,顶箱可放入延长箱中不占体积;使用时,顶箱扣在延长箱上增大体积,采样箱高度随延长箱数量的变化而改变。稻田试验性观测发现,洞庭湖区4月早稻甲烷的平均排放通量为10.37mg/(m2·h)。结果表明,应用嵌套式静态采样箱开展湿地甲烷监测结果可靠。但采样操作需在40min内完成,以避免箱体内部环境变化引起甲烷排放不稳定。Basic rules for making greenhouse gas sampling equipment were summarized, and a nested sampling chamber was designed to measure methane emission fluxes of different kinds of wetland around Dongting Lake. The advantage of the chamber was its adjustability of height and volume. When transported or not in use, reduced volume could be realized by setting the top of the chamber into the middle of it; when used, expanded volume could be generated by setting the top of the chamber upon the middle of it. The height of the chamber changed when numbers of middle parts increased. Field observation showed that the average methane emission flux of paddy around Dongting Lake in April was 10.37 mg/（ m^2· h）, which confirmed the reliability of applying the chamber in wetland methane monitoring. It was remarkable that sampling operation should be completed in 40 minutes in order to avoid instability of methane emission caused by internal environment change of the chamber.

关 键 词：采样箱 嵌套式 湿地 甲烷 监测 

分 类 号：X831[环境科学与工程—环境工程]