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1995～ 1997年 3年的实验研究中 ,用静态箱法和气相色谱仪对长春地区不同水管理方式稻田的甲烷排放进行了采样和测量工作 ,1996年和 1997年逢晴天还同步进行了地面实验基地的卫星遥感数据 (TM和NOAA—AVHRR数据 )的接收工作。根据测算的稻田甲烷排放通量和用遥感数据提取的水稻种植面积 ,估算出区域尺度的稻田甲烷排放总量。 3年来的研究结果显示 ,长春地区水稻种植面积为 17.72 12× 10 4 hm2 ,稻田甲烷平均排放通量为 2 .984mg/(m2 ·h) ,长春地区稻田甲烷总排放量为 0 .0 2 0 3Tg/a。用灰关联方法分析了稻田甲烷排放的影响因子 ,建立了以水稻植被指数为参数的淹灌稻田的甲烷排放通量估算模型
During the three-year experimental study from 1995 to 1997, the methane emission from paddy fields of different water management practices in Changchun area was sampled and measured by static chamber method and gas chromatograph. In 1996 and 1997, Base satellite remote sensing data (TM and NOAA-AVHRR data) reception. Based on the measured methane emission fluxes from rice fields and rice acreage extracted from remote sensing data, the total methane emissions from paddy fields at the regional scale are estimated. The results of the past three years show that the rice planting area in Changchun is 17.72 12 × 10 4 hm 2, the average methane emission of paddy fields is 2.984 mg / (m 2 · h), and the total methane emission in paddy fields in Changchun is 0.20 3Tg / a. The influencing factors of methane emission from paddy fields were analyzed by the gray relational method, and a methane emission flux estimation model of flooded paddy field with rice vegetation index as the parameter