长白山阔叶红松林二氧化碳浓度特征

应用生态学报 ›› 2005, Vol. 16 ›› Issue (1): 49-53.

长白山阔叶红松林二氧化碳浓度特征

吴家兵^1,2, 关德新¹, 赵晓松¹, 韩士杰¹, 于贵瑞³, 孙晓敏³

1. 中国科学院沈阳应用生态研究所, 沈阳, 110016;
2. 中国科学院研究生院, 北京, 100039;
3. 中国科学院地理科学与资源研究所, 北京, 100101

收稿日期:2004-02-05 修回日期:2004-04-14 出版日期:2005-01-15 发布日期:2005-01-15
通讯作者: 关德新
基金资助:
国家自然科学基金项目(30370293)、中国科学院知识创新工程重大项目(KZCX1-SW-01-01A)和中国科学院沈阳应用生态研究所领域前沿资助项目.

CO₂ concentration character in broad-leaved Korean pine forest of Changbai Mountains

WU Jiabing^1,2, GUAN Dexin¹, ZHAO Xiaosong¹, HAN Shijie¹, YU Guirui³, SUN Xiaomin ³

1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China;
3. Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

Received:2004-02-05 Revised:2004-04-14 Online:2005-01-15 Published:2005-01-15

摘要/Abstract

摘要： 采用红外气体分析仪对长白山阔叶红松林2003年度CO₂浓度特征进行了分层连续监测,并结合同步气象资料进行了分析.结果表明,长白山阔叶红松林CO₂浓度存在明显的日变化、季变化与垂直变化,这些变化与植被生理活动、土壤呼吸及林内湍流交换强度有关.生长季林内全天CO₂浓度最高值出现在凌晨5:00左右的近地面层,最低值出现在午后15:00左右的冠层部位;日出前后,随着逆温层的打破,林下CO₂有一明显的释放过程.观测期间林内CO₂平均浓度为377 μmol·mol^-1,月平均最高值出现在1月,为388μmol·mol^-1,最低值出现在8月,为352μmol·mol^-1.生长季夜间森林表现为CO₂的排放源,日间表现为CO₂的吸收汇;非生长季日间与夜间森林都主要表现为CO₂的排放源,但在午间冠层部位仍有数小时表现为CO₂的吸收过程.

关键词: CO₂浓度, 长白山, 阔叶红松林, CO₂交换

Abstract: The CO₂ concentration in broad-leaved Korean pine forest of Changbai Mountains was measured continuously with a CO₂ infra-red analyzer in 2003. The results showed that the CO₂ concentration in the forest had striking characteristics of temporal-spatial variations, which were mainly influenced by the physiological processes of plants, soil respiration, and intensity of turbulence exchange. In growing season, the daily maximum and minimum CO₂ concentration appeared mostly on the surface floor at about 5:00 in the early morning and at canopy location at about 15:00 in the afternoon, respectively. There was an obviously process of forest CO₂ emission when the inversion broke at dawn. The average CO₂ concentration in forest was 377 μmol·mol^-1 in 2003, the maximum of monthly average appeared in January as 388 μmol·mol^-1, and the minimum of monthly average appeared in August as 352 μmol·mol^-1. The forest acted as CO₂ source in night time and turned to sink in daytime, during growing season. In non-growing season, the forest acted as CO₂ source in both daytime and night time, but still had a clear evidence of CO₂ assimilation at noon, with canopy location during non-growing season.

Key words: CO₂ concentration, Changbai Mountains, Broad-leaved Korean pine forest, CO₂ exchange

中图分类号:

S716

吴家兵, 关德新, 赵晓松, 韩士杰, 于贵瑞, 孙晓敏. 长白山阔叶红松林二氧化碳浓度特征[J]. 应用生态学报, 2005, 16(1): 49-53.

WU Jiabing, GUAN Dexin, ZHAO Xiaosong, HAN Shijie, YU Guirui, SUN Xiaomin . CO₂ concentration character in broad-leaved Korean pine forest of Changbai Mountains [J]. Chinese Journal of Applied Ecology, 2005, 16(1): 49-53.

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