| 玉米农田生态系统CO2通量的动态变化 |
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| 引用本文： | 梁涛,李荣平,吴航,刘景利,史奎桥,张兵兵,常松.玉米农田生态系统CO2通量的动态变化[J].气象与环境学报,2012,28(3):49-53. |
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| 作者姓名： | 梁涛 李荣平 吴航 刘景利 史奎桥 张兵兵 常松 |
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| 作者单位： | 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 |
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| 基金项目： | 辽宁省气象局项目，国家重点基础研究发展计划(973计划) |
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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。
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| 关 键 词： | 玉米农田 涡度相关 CO2通量 动态变化 |
Dynamics of carbon dioxide flux in a maize agroecosystem |
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| LIANG Tao,LI Rong-ping,WU Hang,LIU Jing-li,SHI Kui-qiao,ZHANG Bing-bing,CHANG Song.Dynamics of carbon dioxide flux in a maize agroecosystem[J].Journal of Meteorology and Environment,2012,28(3):49-53. |
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| Authors: | LIANG Tao LI Rong-ping WU Hang LIU Jing-li SHI Kui-qiao ZHANG Bing-bing CHANG Song |
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| Institution: | 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 |
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| 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. |
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| Keywords: | Maize agroecosystem Eddy covariance technique CO2 flux Dynamic variation |
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