%0 Journal Article
%T Methane Emissions from Rice Fields in the Chengdu Plain of China<br>成都平原稻田甲烷排放的实验研究
%A Ren Lixin
%A Wang Gengchen
%A Zhang Renjian
%A Duan Changlin
%A M A K Khalil
%A M J Shearer
%A R A Rasmussen
%A R W Dalluge
%A <br>任丽新
%A 王庚辰
%A 张仁健
%A 段长麟
%A M. A. K. Khalil
%A M. J. Shearer
%A R. A. Rasmussen
%A R. W. Dalluge
%J 大气科学
%D 2002
%I 
%X According to the measured data of four rice seasons between 1996 and 1999, characteristics of seasonal variation and annual variation of methane emission are analyzed for single-season rice in the Chengdu Plain. The results show a great variation in methane emission during the rice growing season, and the peak values appear during tillering period and fruiting period. A great inter-annual change is also observed and ranged from 2.35 mg m 2 h-1 to 33.95 mg m-2 h-1. The averaged value of CH4 emission for the four years is 12 mg m-2 h-1. Compared with 30 mg m-2 h-1 for the 7-year average of Leshan in Sichuan Province, there is an apparent regional difference. Methane emission from rice field is affected by several factors including temperaturc, ferlilization, rice variely, soil oxidation-reduction potential and water depth of rice field and so on. Results show that the average temperature during rice growing season in the Chengdu Plain has a little influence on annual CH4 emission. However, during the early growing season, the lemperature has a relatively significant influence on daily variation of CH4 emission from rice field. Another finding is that the weights of root, stalk and leaf of rice plant body have a signif-icant influence on CH4 emission. An oplimum combinalion of many effeclive factors is proposed in order to develop its potential of reducing CH4 emission.
%K rice field
%K methane
%K seasonal variation
%K annual variation<br>稻田
%K 甲烷
%K 季节变化
%K 年际变化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=46874A5A102033D774D00D819E91CD68&aid=BE575CB27F8DC7A9&yid=C3ACC247184A22C1&vid=96C778EE049EE47D&iid=B31275AF3241DB2D&sid=507521DBC725630F&eid=6EDA906E07280FB0&journal_id=1006-9895&journal_name=大气科学&referenced_num=7&reference_num=9