江西师范大学学报（自然科学版）
江西師範大學學報（自然科學版）
강서사범대학학보（자연과학판）
JOURNAL OF JIANGXI NORMAL UNIVERSITY（NATURAL SCIENCES EDITION）
2014年
4期
429-433
,共5页
聂兰琴%付姗%吴琴%胡启武
聶蘭琴%付姍%吳琴%鬍啟武
섭란금%부산%오금%호계무
鄱阳湖%沉水植物区%CO2%CH4
鄱暘湖%沉水植物區%CO2%CH4
파양호%침수식물구%CO2%CH4
Poyang lake%submerged plants zone%carbon dioxide%methane
为进一步准确评估鄱阳湖湿地碳平衡，探讨不同湿地类型碳排放特征与控制因子，在鄱阳湖南矶湿地国家级自然保护区选择典型沉水植物分布区进行了 CO2、CH4释放的昼夜变化观测.结果表明：1）CO2、CH4释放均具有明显的单峰型日变化模式，释放速率变化范围分别为172.43~365.40 mg CO2· m -2·h -1、16.92~31.57 mg CH4·m -2·h -1；2）温度是影响 CO2、CH4释放的主要因子，CO2释放速率与土壤温度之间相关性最显著，而 CH4释放速率与水温相关性最显著；CO2释放基于气温和土壤温度的敏感性指数 Q 10分别为2.6，3.0；3）观测日沉水植物分布区碳排放以 CO2为主，约占总碳排放的77.2%，CH4约占22.8%，考虑到两者的增温潜能，沉水植物区 CH4释放引起的温室效应高于 CO2.
為進一步準確評估鄱暘湖濕地碳平衡，探討不同濕地類型碳排放特徵與控製因子，在鄱暘湖南磯濕地國傢級自然保護區選擇典型沉水植物分佈區進行瞭 CO2、CH4釋放的晝夜變化觀測.結果錶明：1）CO2、CH4釋放均具有明顯的單峰型日變化模式，釋放速率變化範圍分彆為172.43~365.40 mg CO2· m -2·h -1、16.92~31.57 mg CH4·m -2·h -1；2）溫度是影響 CO2、CH4釋放的主要因子，CO2釋放速率與土壤溫度之間相關性最顯著，而 CH4釋放速率與水溫相關性最顯著；CO2釋放基于氣溫和土壤溫度的敏感性指數 Q 10分彆為2.6，3.0；3）觀測日沉水植物分佈區碳排放以 CO2為主，約佔總碳排放的77.2%，CH4約佔22.8%，攷慮到兩者的增溫潛能，沉水植物區 CH4釋放引起的溫室效應高于 CO2.
위진일보준학평고파양호습지탄평형，탐토불동습지류형탄배방특정여공제인자，재파양호남기습지국가급자연보호구선택전형침수식물분포구진행료 CO2、CH4석방적주야변화관측.결과표명：1）CO2、CH4석방균구유명현적단봉형일변화모식，석방속솔변화범위분별위172.43~365.40 mg CO2· m -2·h -1、16.92~31.57 mg CH4·m -2·h -1；2）온도시영향 CO2、CH4석방적주요인자，CO2석방속솔여토양온도지간상관성최현저，이 CH4석방속솔여수온상관성최현저；CO2석방기우기온화토양온도적민감성지수 Q 10분별위2.6，3.0；3）관측일침수식물분포구탄배방이 CO2위주，약점총탄배방적77.2%，CH4약점22.8%，고필도량자적증온잠능，침수식물구 CH4석방인기적온실효응고우 CO2.
For further accurate evaluation of carbon balance in Poyang lake wetland,and to discuss the characteris-tics and control factors of carbon emissions from different wetland types. Carbon dioxide( CO2 )and methane (CH4 )fluxes were measured in a wetland dominated by submerged plant species in the national nature reserve, Nanji wetlands of Poyang Lake. Our results indicated that both CO2 and CH4 showed clear diurnal variation pattern. The emission rate of CO2 ranged from 172. 43 to 365. 40 mg·m - 2 ·h - 1 . The flux rate of CH4 varied from 16. 92 to 31. 57 mg·m - 2 ·h - 1 . Moreover,temperature was the main effect factor of CO2 and CH4 fluxes. The flux rate of CO2 was significantly positively related to soil temperature. But CH4 emission showed significant positive correlation with water temperature. The value of Q10 which reflected temperature sensitivity of CO2 emission was 2. 6 for air tempera-ture and 3. 0 for soil temperature,respectively,which suggested CO2 emission from submerged plants zones was more sensitive to soil temperature change than air temperature. Additionally,on the measurement day,CO2 and CH4 ac-counted for 77. 2% and 22. 8% of total carbon emission,respectively. However,due to much higher global warming potential of CH4 than CO2 ,CH4 contributed more than CO2 in greenhouse effect for submerged plants zones.
