主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2012, Vol. 28 ›› Issue (3): 49-53.doi:

• 论文 • 上一篇    下一篇

玉米农田生态系统CO2通量的动态变化

梁涛1 李荣平2,3 吴航4 刘景利1 史奎桥1 张兵兵1 常松5   

  1. 1. 锦州市生态与农业气象中心，辽宁 锦州 121001；2. 中国气象局沈阳大气环境研究所，辽宁 沈阳 110016；3. 中国科学院植物研究所植被与环境变化国家重点实验室，北京100093；4. 锦州市气象局，辽宁 锦州 121001；5. 凌海市气象局，辽宁 凌海 121200
  • 出版日期:2012-06-30 发布日期:2012-06-30

Dynamics of carbon dioxide flux in a maize agroecosystem

LIANG Tao1 LI Rong-ping2,3 WU Hang4 LIU Jing-li1 SHI Kui-qiao1 ZHANG Bing-bing1 CHANG Song5   

  1. 1. Jinzhou Ecological and Agricultural Meteorology Centre, Jinzhou 121001, China; 2. Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110016, China; 3. State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, China; 4. Jinzhou Meteorological Service, Jinzhou 121200, China; 5. Linghai Meteorological Service, Linghai 121200, China
  • Online:2012-06-30 Published:2012-06-30

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摘要： 利用2008年辽宁锦州农田生态系统野外观测站涡动相关系统通量观测资料，分析了玉米农田生态系统生长季(5—10月)及非生长季CO2通量动态变化。结果表明：玉米农田生态系统的非生长季日动态趋势不明显；生长季日动态明显，呈明显的U型曲线，CO2通量最大值出现在12:00时，为-1.19 mg·m-2·s-1；不同物候期的日动态也呈现U型曲线，各发育期CO2通量日最大值范围为0.07～-0.23 mg·m-2·s-1；玉米农田生长季生态系统净CO2交换日累积（NEE）为-652.8 g·m-2，非生长季NEE499.8 g·m-2，2008年碳收支-153.0 g·m-2，表现为碳汇。

关键词: 玉米农田, 涡度相关, CO2通量, 动态变化

Abstract:  CO2 flux was measured continuously by using the eddy covariance technique at Jinzhou agricultural ecosystem station in 2008, and its dynamic characteristics during the growth season (from May to October) and the non-growth season were investigated. The results show that diurnal dynamic variation of CO2 flux in the maize ecosystem is not obvious during the non-growth season, while that is significant during the growth season and varies in a “U” shape curve. The maximum value is -1.19 mg·m-2·s-1 and appears at 12:00 o’clock. The diurnal trends are also a “U” shape curve in the different phenophases. The maximum range of diurnal variation of CO2 flux is 0.07～-0.23 mg·m-2·s-1 in the different development stages. NEE is -652.8 g·m-2 and 499.8 g·m-2 during the growth season and the non-growth season in the maize agroecosystem, respectively. Carbon budget is -153.0 g·m-2 in 2008 and it means that a maize agroecosystem is the carbon sink.

Key words: Maize agroecosystem, Eddy covariance technique, CO2 flux, Dynamic variation