江西省冬水田休闲期甲烷排放研究  

CH_4 Emissions from the Year-round Flooded Paddy Field in Fallow Season in Jiangxi

作　　者：孔萍[1] 殷剑敏 占明锦[1] 

机构地区：[1]江西省气候中心,江西南昌330096 [2]江西省气象台,江西南昌330096

出　　处：《气象与减灾研究》2015年第2期55-58,共4页Meteorology and Disaster Reduction Research

基　　金：中国清洁发展机制赠款项目(编号:1112056;1213118;1213028)

摘　　要：利用85个气象站的观测资料和14个农业气象观测站水稻生育期资料,以及第二次土壤普查数据,基于气温与冬水田休闲期甲烷排放通量的指数关系模型,分析了江西省2000—2013年冬水田休闲期甲烷排放因子和排放量的时空分布特征。结果表明:1)江西省冬水田甲烷排放因子无显著的上升趋势;2)江西省冬水田休闲期甲烷排放平均通量为7.66 mg/(m2·h),平均年排放因子为406.5 kg/hm2,其中2007年排放通量为1.214×105 t,占稻田甲烷排放的12.4%;3)吉安、赣州、抚州、上饶和宜春市是江西省冬水田休闲期甲烷排放的主要地区,累计约占全省排放量的75.0%;4)各设区市冬水田休闲期甲烷排放量主要决定于各地水田面积的大小,赣州市除外。Based on the model of exponential relationship between daily average temperature and CH4 emission flux from the yearround flooded paddy field in fallow season, the data from 85 meteorological station in Jiangxi, the rice growth observation data from14 agricultural meteorological stations and the second soil survey data are used to study the temporal-spatial distribution of CH4 emissions from the year-round flooded paddy field in Jiangxi. The conclusions are as follow：1） during 2000-2013, there is no significant ascendant trend from the year-round flooded paddy field in fallow season. 2）Between 2000-2013, the average flux of CH4 emissions from the year-round flooded paddy is 7.66 mg/（m2·h）, the average annual emission factor is 406.5 kg/hm2. In 2007, the CH4 emission reached about 1.214 ×105t, which accounted for 12.4%. 3） Five cities in Jiangxi province are the main regions of CH4 emission from the year-round flooded paddy field in fallow season, which includes Ji＇an, Ganzhou, Fuzhou, Shangrao and Yichun. 4）CH4emissions from the year-round flooded paddy field in fallow season depend on the paddy field area size, except in Ganzhou city.

关 键 词：冬水田 休闲期 甲烷排放通量 温室气体 

分 类 号：P463.2[天文地球—大气科学及气象学]