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Advances in Earth Science >

2019 , Vol. 34 >Issue 11: 1141 - 1151

DOI: https://doi.org/10.11867/j.issn.1001-8166.2019.11.1141

Characteristics and Drivers of Methane Fluxes from a Rice Paddy Based on the Flux Measurement

  • Chaoqing Song ,
  • Wei Liu ,
  • Haibo Lu ,
  • Wenping Yuan
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  • 1. State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
    4. Guangdong Province Key Laboratory for Change and Natural Disaster Studies, School of Atmospheric Sciences, Sun Yat-sen University, Guangdong Zhuhai 519082, China
    5. Southern Marine Science and Engineering Guangdong Laboratory, Guangdong Zhuhai 519082, China
Song Chaoqing (1995-), Yichang City, Hubei Province, Master student. Research areas include methane emission from rice field. E-mail: songchaoqing@lzb.ac.cn

Received date: 2019-09-09

  Revised date: 2019-10-29

  Online published: 2019-12-31

Supported by

the National Natural Science Foundation of China “Research on the impact of climate and land use change on land-river of carbon flux”(31870459)

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Abstract

Rice paddies are an important anthropogenic source of methane (CH4) to the atmosphere, which aggravate the global warming greatly. CH4 fluxes from a rice paddy in Central China were continuously measured with the eddy covariance method in 2018. The characteristics, dynamics and drivers of the observed CH4 fluxes from this paddy field were subsequently analyzed. The results indicated that ① a distinct seasonal variation of daily CH4 fluxes was found over the whole observed period. Daily CH4 fluxes were the highest in the vegetative period, then decreased gradually, and became the lowest in the fallow period; ② observed CH4 fluxes had a clear single-peak diurnal pattern during the vegetative and reproductive periods, and reached daily peaks at about 14:00-16:00. However, no obvious diurnal variation in CH4 fluxes was observed during the fallow period; ③ air temperature was the most important drivers that controlled the seasonal variation of CH4 fluxes from this paddy field, and Vapor Pressure Deficit (VPD) was also found related to the CH4 emissions; ④ the largest daily CH4 flux was 0.69 μmol/(m2·s), occurred in the late of vegetative period, and the total amount of CH4 emissions over the whole observed period was about 28 g C/m2.

Key words： Eddy covariance; Rice paddy; Methane fluxes.

Cite this article

Chaoqing Song , Wei Liu , Haibo Lu , Wenping Yuan . Characteristics and Drivers of Methane Fluxes from a Rice Paddy Based on the Flux Measurement[J]. Advances in Earth Science, 2019 , 34(11) : 1141 -1151 . DOI: 10.11867/j.issn.1001-8166.2019.11.1141

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