广东清远早、晚稻稻田甲烷排放的观测研究  

Methane Emissions from the Early and Late Rice Fields of Qingyuan, Guangdong

作　　者：许黎[1] 任万辉[2] 杨宁 王天龙 刘锦銮[4] M A K Khalil R A Rasmussen M J Shearer 

机构地区：[1]中国气象局气候研究开放实验室,北京100081 [2]辽宁省沈阳市环境监测中心 [3]广东省清远市气象局 [4]广东省气象局气候与农业气象中心 [5]Department of Physics,Portland State University [6]Oregon Health & Science University,OGI School of Science

出　　处：《气象》2007年第3期19-27,共9页Meteorological Monthly

基　　金：中国科技部和美国能源部合作项目<气候科学>第3课题"农田温室气体排放";资助编号:DE-FG03-01ERG63262和DE-FG02-04ER63913)

摘　　要：分析了2003、2004年广东省清远市郊区早、晚稻稻田甲烷(CH4)的排放通量,结果表明广东清远早、晚稻稻田CH4排放通量的几何平均值2003年为4.38mg·m-2·h-1和6.09mg·m-2·h-1;2004年为5.17mg·m-2·h-1和8.3mg·m-2·h-1,土壤有机质含量是造成2003和2004年CH4排放差异的原因之一。水稻品种的不同,CH4排放通量也有所不同,实验表明,水稻品种“七丝尖”的排放通量比品种“金优99”高1.08mg·m-2·h-1,产量却只有64%。此外,与相关的测量结果进行初步比较。CH4 emission fluxes from early and late rice fields in Qingyuan suburbs of Guangdong Province during the period of 2003-2004 were analyzed. The experimental site is located in the villages of Longjing and Liwei of northwest of Guangzhou City, A static chamber method is used for the measurement of CH4 emission. Air samples in the field box were analyzed using a gas chromatograph equipped with a flame ionization detector （GC/FID GOW-MAC, series 350） in a laboratory of Qingyuan Meteorological Station. The average fluxes of CH4 emission for rice crop acreage during the early and late rice growing seasons were 4.38 and 6.09mg·m^-2·h^-1 in 2003, 5.17 and 8.3mg·m^-2·h^-1 in 2004. CH4 emission and the rice yield had some differences for different rice eultivar. Rice variety ＂Qisijian＂ has not only higher CH4 emission （higher by 1.08mg·m^-2·h^-1 ） but also a lower yield （0.64 times yield） compared with rice variety ＂Jinyou 99＂. Therefore, the choice of the rice variety which has less CH4 emission and more yield is a good way to mitigate CH4 emission.

关 键 词：土壤有机质含量 CH4排放 稻田 

分 类 号：S451.21[农业科学—植物保护]