HR: 0800h
AN: A11C-0597    [Abstracts]
TI: N2O and CH4 Flux from Winter Wheat Field in the North China Plain
AU: * Su, F
EM: sufang@cau.edu.cn
AU: Hu, X
EM: huxiaokangliu@163.com
AU: Huang, B
EM: bxhuang@cau.edu.cn
AU: Jiang, R
EM: rfjiang@cau.edu.cn
AB: N2O emission and CH4 absorption in winter wheat field were measured during April to June in 2007 in North China Plain using an automatic measurement system. This study indicated that, N2O emissions peaked during 2 weeks after N application, and the N2O emission pattern is mainly driven by the timing of N fertilization. In addition, the diurnal change of N2O emission was similar to the pattern of soil temperature fluctuation especially during the following week after N fertilization and irrigation. The soil in the North China Plain was a net sink of methane, and the ambient concentration of methane was an important environmental factor that affected its uptake by soil.
DE: 0322 Constituent sources and sinks
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 4251 Marine pollution (0345, 0478)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting