Integrated Analysis of Methane Emissions on in Rice Paddy Field of South Jiangsu Province

Field experimental results about methane (CH4) emissions of rice growing seasons were analyzed in south Jiangsu province from 2001 to 2010. In order to study the temporal and spatial variation characteristics, conducting a database of CH4 emissions of rice paddy field in the area. On the spatial distribution, Zhenjiang city had the highest CH4 emission flux in rice growing season of this area, up to 7.80g/(m2h). Amount of CH4 emissions per unit area in Changzhou city was slightly higher than other cities, up to 17.17g/m2. From 2001 to 2010, both the rice growing area and the CH4 emission of south Jiangsu province shown a declining trend during last decade. The rice growing area declined 170670 ha, a drop of 28.81%; total CH4 emissions decreased by 29.90×1010g, a drop of 30.72%. From 2001 to 2010, there was no significant difference of CH4 emissions per unit area between the cities, all CH4 emissions reduction was mainly due to a reduction of rice growing area.