中文摘要：

本文研究了延边地区不同开垦年限及不同施肥类型下稻田生长季CO2的排放特征，研究表明，不同开垦年限稻田CO2排放能力差异明显，随开垦年限延长，稻田CO2排放量则明显下降，80a稻田CO2排放量显著高于120a稻田。稻田CO2排放季节特征受肥料类型的影响较大，单施有机肥促进了水稻分蘖期及黄熟期稻田CO2排放速率，而单施化肥在水稻分蘖期、孕穗末期及黄熟期均表现出较强的CO2排放能力，化肥与有机肥配施措施促进了分蘖一拔节期CO2排放速率。全生长季单施有机肥、有机肥配施化肥和单施化肥处理的CO2月排放量均值分别为229．60g·m^-2、209．49g·m^-2和137．14g·m^-2，施用有机肥可以明显促进稻田CO2的排放。

英文摘要：

The CO2 emissions under different cultivation periods and fertilizer types in paddy in Yanbian of China were investigated in this paper. The results showed that the emissions of CO2 were different in different reclamation times＇ paddy. The CO2 emissions in 80 a were higher than that in 120 a paddy indicating that the CO2 emissions decreased with the increasing of the reclamation times. The season character of CO2 emissions was affected by fertilizer types applied into the paddy. The organic fertilizer could improve the rate of CO2 emission at the tillering stage and mature stage of rice in paddy. The chemical fertilizer could improve the rate of CO2 emission at the tillering stage, ending of booting stage and mature stage of rice in paddy, and the application of organic fertilizer with chemical fertilizer could improve the rate of CO2 emission at tillering-jointing stage of rice in paddy. The mean emissions of CO2 per month were 229.60 g·m^-2 for organic fertilizer, 209.49 g· m^-2 for organic with chemical fertilizer and 137.14 g·m^-2 for chemical fertilizer in paddy, respectively. The organic fertilizer could promote obviously emission of CO2 in Yanbian paddy.