中国淮河流域农业生态系统中CH4通量及其影响因素评估

doi:10.1016/j.jia.2024.03.076

Journal of Integrative Agriculture ›› 2024, Vol. 23 ›› Issue (12): 4203-4215.DOI: 10.1016/j.jia.2024.03.076

所属专题：农业生态环境-气体排放和重金属Agro-ecosystem & Environment—Gas emission & heavy metals

中国淮河流域农业生态系统中CH₄通量及其影响因素评估

收稿日期:2023-11-17 接受日期:2024-03-01 出版日期:2024-12-20 发布日期:2024-11-18

Assessment of CH₄ flux and its influencing drivers in the rice–wheat agroecosystem of the Huai River Basin, China

Xiaolan Yu¹, Fangmin Zhang^1#, Yanqiu Fang¹, Xiaohan Zhao¹, Kaidi Zhang^{2, 3}, Yanyu Lu^{2, 3#}

¹Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Jiangsu Key Laboratory of Agricultural Meteorology, College of Ecology and Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China
²Anhui Institute of Meteorological Sciences/Anhui Province Key Laboratory of Atmospheric Science and Satellite Remote Sensing, Hefei 230031, China
³Shouxian National Climatology Observatory, Huai River Basin Typical Farm Eco-Meteorological Experiment Field of China Meteorological Administration, Shouxian 232200, China

Received:2023-11-17 Accepted:2024-03-01 Online:2024-12-20 Published:2024-11-18
About author:Xiaolan Yu, Mobile: +86-18151092087, E-mail: xiaolan-yu@qq.com; #Correspondence Fangmin Zhang, Mobile: +86-18795908462, E-mail: fmin.zhang@nuist.edu.cn; Yanyu Lu, Mobile: +86-13866716763, E-mail: ahqxlyy@163.com
Supported by:
This work was supported by the Natural Science Foundation of Jiangsu Province, China (BK20220017), the Innovation Development Project of China Meteorological Administration (CXFZ2023J073), the Key Research and Development Program of Anhui Province, China (2022M07020003), the Graduate Student Practice and Innovation Program of Jiangsu Province, China (SJCX22_0374).

摘要/Abstract

摘要：

为了解中国淮河流域农业生态系统中CH₄通量的变化及其气候驱动因素，于2019年11月至2021年10月，在安徽省寿县的典型水稻-小麦轮作系统中利用开路涡度相关技术观测了CH₄通量。然后，利用Akaike信息准则方法对这些变化及其驱动因素进行了分析。结果显示：（1）CH₄通量呈现明显的日变化，在当地时间9:00~13:00期间出现单峰值。水稻生长季节（RGS）的营养生长期间，CH₄通量最高峰出现在11:00，峰值为2.15 µg m^-2 s^-1。（2）CH₄通量也表现出明显的季节变化。RGS的营养生长阶段的平均CH₄通量（193.8±74.2 mg m^-2 d^-1）是所有生长阶段中最高的。非水稻生长季节的年总CH₄通量（3.2 g m^-2）相对较少，仅占RGS总CH₄通量（23.9 g m^-2）的88.2%。（3）无论是在RGS还是非RGS中，CH₄通量均随着空气温度、土壤温度和土壤含水量的增加而显著增加，而在RGS中随着饱和水汽压差的增加而显著减少。本研究为全面了解淮河流域稻-麦轮作农业生态系统中CH₄通量提供了依据。此外，我们的研究结果有助于验证和修正该地区的CH₄模型。

Abstract:

To understand the CH₄ flux variations and their climatic drivers in the rice–wheat agroecosystem in the Huai River Basin of China, the CH₄ flux was observed by using open-path eddy covariance at a typical rice–wheat rotation system in Anhui Province, China from November 2019 to October 2021. The variations and their drivers were then analyzed with the Akaike information criterion method. CH₄ flux showed distinct diurnal variations with single peaks during 9:00–13:00 local time. The highest peak was 2.15 µg m^–2 s^–1 which occurred at 11:00 in the vegetative growth stage in the rice growing season (RGS). CH₄ flux also showed significant seasonal variations. The average CH₄ flux in the vegetative growth stage in the RGS (193.8±74.2 mg m^–2 d^–1) was the highest among all growth stages. The annual total CH₄ flux in the non-rice growing season (3.2 g m^–2) was relatively small compared to that in the RGS (23.9 g m^–2). CH₄ flux increased significantly with increase in air temperature, soil temperature, and soil water content in both the RGS and the non-RGS, while it decreased significantly with increase in vapor pressure deficit in the RGS. This study provided a comprehensive understanding of the CH₄ flux and its drivers in the rice–wheat rotation agroecosystem in the Huai River Basin of China. In addition, our findings will be helpful for the validation and adjustment of the CH₄ models in this region.

Key words: CH₄ flux , eddy covariance method , rice-wheat rotation agroecosystem , Huai River Basin

Xiaolan Yu, Fangmin Zhang, Yanqiu Fang, Xiaohan Zhao, Kaidi Zhang, Yanyu Lu. 中国淮河流域农业生态系统中CH₄通量及其影响因素评估[J]. Journal of Integrative Agriculture, 2024, 23(12): 4203-4215.

Xiaolan Yu, Fangmin Zhang, Yanqiu Fang, Xiaohan Zhao, Kaidi Zhang, Yanyu Lu. Assessment of CH₄ flux and its influencing drivers in the rice–wheat agroecosystem of the Huai River Basin, China[J]. Journal of Integrative Agriculture, 2024, 23(12): 4203-4215.

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中国淮河流域农业生态系统中CH₄通量及其影响因素评估

Assessment of CH₄ flux and its influencing drivers in the rice–wheat agroecosystem of the Huai River Basin, China

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