三江平原稻田CO_2通量及其环境响应特征  

CO_2 fluxes from rice fields of Sanjiang plain and its environmental response factors.

作　　者：宋涛[1] 王跃思[2] 宋长春 石立庆[2] 黄耀[2] 王盘兴[1] 

机构地区：[1]南京信息工程大学应用气象学系,江苏南京210044 [2]中国科学院大气物理研究所,北京100029 [3]中国科学院东北地理与农业生态研究所,吉林长春130012

出　　处：《中国环境科学》2006年第6期657-661,共5页China Environmental Science

基　　金：国家自然科学基金资助项目(40431001);中国科学院知识创新重大项目(KZCX3I-SW-01)

摘　　要：基于涡度相关技术，于2004年生长季对三江平原稻田CO2通量进行了观测．结果表明，CO2通量日变化特征明硅；月平均的CO2通量日变化幅度很大，6-9月，夜间最大净排放通量分别为0．23，0．23，0．18，0．12mg／（m^2·s）；白天最大净吸收通量分别为-0．14，-0．68，-0．66，-0．22mg／（m^2·s）．白天CO2通量的变化与光合有效辐射明显相关，并且逐月变化．利用摩擦速度（队）的闽值进行筛选，夜间通量与温度之间无明显相关同期观测的静态箱法结果表明。夜间通量与空气和土壤温度相关,整个生长季，生态系统从大气中吸收的C为5.30t／hm^2.The CO2 flux of the dee field of Sanjiang plain were measured during the growing season in 2004, based on eddy correlation system. Diurnal variation of CO2 was obvious with great change range of its monthly average; from 6-9 mouth, the greatest net emission fluxes at night were 0.23, 0.23, 0.18, 0.12mg/（m^2·s）, respectively; at day, the greatest fluxes were -0.14, -0.68, -0.66, -0.22mg/（m^2·s）,respectively. The variation of fluxes at day were related obviously with photosynthetically active radiation, with derived relationship varying monthly. Nighttime CO2 fluxes corrected by friction velocity U. was not related obviously with temperature, but the fluxes of same time measured by static chamber technique was related obviously with air and soil temperature. In the whole growing season, the ecosystem uptake C from atmosphere was 5.30t/hm^2.

关 键 词：CO2通量 涡度相关法 稻田 

分 类 号：X131.1[环境科学与工程—环境科学]