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当前位置: 首页 > 文章 > 非生长季长白山红松针阔叶混交林CO_2通量特征 林业科学 2006,42 (9) 1-6
Position: Home > Articles > Non-growing Seasons CO_2 Flux of a Broad-leaved Korean Pine Forest in Changbai Mountain Scientia Silvae Sinicae 2006,42 (9) 1-6

非生长季长白山红松针阔叶混交林CO_2通量特征

作  者：
吴家兵;关德新;施婷婷;韩士杰;于贵瑞;孙晓敏
单  位：
中国科学院沈阳应用生态研究所;中国科学院地理科学与资源研究所
关键词：
阔叶红松林;CO2通量;涡度相关法;碳收支
摘  要：
采用开路式涡度相关系统对长白山红松针阔叶混交林非生长季的CO2通量特征进行连续监测。结果显示:非生长季CO2通量变动范围为-0·3~0·5mg·m-2s-1;秋末与初春均为显著的释放过程,虽然气温低于生物学最低温度,但在晴朗的午间,森林仍有数小时表现为碳汇的特征;在冬季覆雪状态下,森林存在微弱的相对恒定的CO2释放,在融雪阶段有一释放高峰;土壤温度高于0℃时,净生态系统碳交换量与5cm深土壤温度呈指数相关变化。观测期间(190d),长白山红松针阔叶混交林净碳交换量为127g C·m-2,整体表现为一定强度的碳释放。
译  名：
Non-growing Seasons CO_2 Flux of a Broad-leaved Korean Pine Forest in Changbai Mountain
作  者：
Wu Jiabing~ 1,2 Guan Dexin~1 Shi Tingting~1 Han Shijie~1 Yu Guirui~3 Sun Xiaomin~3(1.Institute of Applied Ecology, Chinese Academy of Sciences Shenyang 110016; 2. Graduate school of Chinese Academy of Sciences Beijing 100049; 3. Institute of Geographic Sciences and Natural Research, Chinese Academy of Sciences Beijing 100101)
关键词：
broad-leaved and Korean Pine forest; CO_2 flux; eddy covariance method; carbon budget
摘  要：
As part of China FLUX program, CO_2 fluxes were measured continuously by an open-path eddy covariance system over a broad_leaved Korean Pine forest in northeastern China, during the non-growing seasons. The CO_2 flux between forest and atmosphere ranged from -0.3 to 0.5 mg·m~ -2 s~ -1 during the observational days, with most positive fluxes occurred in the late autumn and the early spring. Though the air temperature was lower than 5 ℃, the studied forest still showed a clear evidence of carbon assimilation for several hours at noon of late autumn. When covered by snow, the efflux of CO_2 from forest was low and with a constant rate, whereas there was a peak of CO_2 efflux during snow-melt period. The net ecosystem carbon exchange (NEE) showed an exponential regression relationship with 5 cm depth soil temperature when the later was above 0 ℃. The total NEE was 127 g C·m~ -2 in 190 observational days, which indicated that the broad_leaved Korean Pine forest of Changbai Mountain was functioning as a moderate carbon source outside the growing season.

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