Annual emissions of dissolved CO2, CH4, and N2O in the subsurface drainage from three cropping systems
Annual emissions of dissolved CO2, CH4, and N2O in the subsurface drainage from three cropping systems
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DOI：
10.1111/j.1365-2486.2009.01931.x
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发表时间：
2010-02
影响因子：
11.6
通讯作者：
Kazunori Minamikawa;S. Nishimura;T. Sawamoto;Y. Nakajima;K. Yagi
中科院分区：
文献类型：
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作者：
Kazunori Minamikawa;S. Nishimura;T. Sawamoto;Y. Nakajima;K. Yagi
农田氮素淋溶和径流的间接排放是大气N2O的主要来源。最近的研究表明，二氧化碳（CO2）和甲烷（CH4）也通过这些途径排放。我们测量了三个溶解的温室气体（GHG）的浓度在地下排水从现场蒸渗仪，有一个浅的地下水位。CH4和N2O的地下通量使用自动密闭室系统进行监测。比较了水稻、大豆和小麦以及高地三种种植制度的溶解性温室气体和地上温室气体的年总排放量。
Indirect emission of nitrous oxide (N2O), associated with nitrogen (N) leaching and runoff from agricultural lands is a major source of atmospheric N2O. Recent studies have shown that carbon dioxide (CO2) and methane (CH4) are also emitted via these pathways. We measured the concentrations of three dissolved greenhouse gases (GHGs) in the subsurface drainage from field lysimeter that had a shallow groundwater table. Aboveground fluxes of CH4 and N2O were monitored using an automated closed‐chamber system. The annual total emissions of dissolved and aboveground GHGs were compared among three cropping systems; paddy rice, soybean and wheat, and upland rice.