CAJ | 학술논문

采用静态密闭箱-气相色谱法，对崇明生态岛盐渍土稻田生态系统 CO2、CH4和 N2 O 排放进行定位观测。结果表明：不同栽培方式下，稻田生态系统 CO2排放通量在整个水稻生长期变化呈现明显的双峰，CH4和N2 O 排放均呈现明显季节变化和日变化特征。不同处理 CH4在水稻生长季内排放均呈现三峰型态，N2 O 则表现双峰型态。3种栽培方式稻田 CH4和 N2 O 排放通量较高为 XB（穴直播），CZ（机插秧）与 SB（撒直播）较低且接近。在穴播条件下，温室气体日变化观测表明，温室气体排放通量较高出现在13：00—15：00，早上和傍晚相对较低，呈现单峰型态，但在排放通量处于低水平时日变化近似直线型态；温室效应评估分析表明，不同栽培方式间的盐渍土稻田生态系统 GWP 差异相对较小，依次为 XB ＞ SB ＞ CY。在试验处理综合总 ECO2当量中，CH4的GWPs 占较大份额（＞95％），降低稻田生态系统增温潜势重要途径以控制 CH4的排放量为主。
채용정태밀폐상-기상색보법，대숭명생태도염지토도전생태계통 CO2、CH4화 N2 O 배방진행정위관측。결과표명：불동재배방식하，도전생태계통 CO2배방통량재정개수도생장기변화정현명현적쌍봉，CH4화N2 O 배방균정현명현계절변화화일변화특정。불동처리 CH4재수도생장계내배방균정현삼봉형태，N2 O 칙표현쌍봉형태。3충재배방식도전 CH4화 N2 O 배방통량교고위 XB（혈직파），CZ（궤삽앙）여 SB（살직파）교저차접근。재혈파조건하，온실기체일변화관측표명，온실기체배방통량교고출현재13：00—15：00，조상화방만상대교저，정현단봉형태，단재배방통량처우저수평시일변화근사직선형태；온실효응평고분석표명，불동재배방식간적염지토도전생태계통 GWP 차이상대교소，의차위 XB ＞ SB ＞ CY。재시험처리종합총 ECO2당량중，CH4적GWPs 점교대빈액（＞95％），강저도전생태계통증온잠세중요도경이공제 CH4적배방량위주。
A field experiment was conducted to observational research the CO2 ,CH4 and N2 O gas emission from saline soil paddy field ecosystem in Chongming ecological island by the static-chamber and gas chromato-graph(GC)method.The results showed that CO2 emission flux showed two peaks during the whole rice growing period,CH4 and N2 O emissions showed obvious seasonal variation and diurnal variation characteristics in paddy field ecosystem under different cultivation methods.CH4 emission flux of paddy field ecosystem showed three peaks type,and N2 O showed two peaks type during rice growing period.CH4 and N2 O emission flux of XB was higher than CY and SB under three kinds of paddy cultivation method.Under the condition of hill-drop,emission flux of greenhouse gas was higher in 13:00—15:00 and lower in the morning and evening,showing single peak type,but it was approximate linear type when the flux emission was at a low level.Greenhouse effect evaluation results showed that the difference of ecosystem warming potential (GWP)in the paddy field ecosystem of saline soil were relatively small,with the order of XB >SB >CY.In the total ECO2 equivalent,GWPs of CH4 accounted for a larger share (>95%)of different experiments,Therefore,it was an important way to effectively reduce the GWPs of paddy field ecosystem by control of CH4 emissions.