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Tidal irrigation-based rice cultivation enhances coastal blue carbon and decreases GHG emissions in brackish mudflats
编号：1584 访问权限：仅限参会人 更新：2024-10-15 11:44:29 浏览：213次 张贴报告

报告开始：2025年01月14日 17:35（Asia/Shanghai）

报告时间：15min

所在会场：[S13] Session 13-Coastal Environmental Ecology Under Anthropogenic Activities and Natural Changes [S13-P] Coastal Environmental Ecology Under Anthropogenic Activities and Natural Changes

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摘要
Coastal agriculture has been adopted to increase agricultural productivity, whereas its effects on blue carbon function and greenhouse gas (GHG) emissions are unclear. In this study, we investigated the effects of tidal saltwater on CO2 uptake and CH4/N2O emissions from a coastal rice ecosystem, and as well as the associated greenhouse gas mitigation mechanisms. Here, sea rice enhanced net ecosystem CO2 exchange (NEE) and gross primary productivity (GPP) after saltwater irrigation. This was accompanied by an increase in tillering number, shoot dry mass and grain yield. Furthermore, we observed a significant change in the mitigation of CH4 and N2O in the coastal rice system due to the tidal saltwater treatment. Specifically, an anticipated decrease in CH4 was observed during the tillering stage. Additionally, the study highlighted a significant decrease in the sustained-flux global warming potential (SGWP) of the sum CO2-eq of CO2, CH4, and N2O throughout the tidal saltwater irrigation period, with reductions of 22.29%~39.06% for sea rice varieties, respectively. In the rhizosphere soil, functional genes involved in CO2 fixation and CH4 and N2O oxidation were upregulated. Therefore, the simulation of tidal saltwater in a coastal rice system demonstrated its ability to increase carbon uptake and mitigate greenhouse gas emissions, particularly CH4 and N2O. We suggest that coastal rice cultivation using natural tidal irrigation is an effective approach to strengthen the ecological and economic benefits of coastal tidal mudflats by reducing greenhouse gas (GHG) emissions and enhancing rice yields.
 
关键词
Sea rice; Carbon uptake; Saltwater tidal irrigation; Coastal wetlands; Coastal agriculture; Climate change
报告人
Lang Zhang
Postdoctor Chinese Academy of Sciences (CAS)；South China Botanical Garden (SCBG)；State Key Laboratory of Estuarine and Coastal Research, Center for Blue Carbon Science and Technology, East China Normal University

稿件作者
Lang Zhang Chinese Academy of Sciences (CAS)；South China Botanical Garden (SCBG)；State Key Laboratory of Estuarine and Coastal Research, Center for Blue Carbon Science and Technology, East China Normal University
Linlin Li College of Agronomy, Hunan Agricultural University
Hualei Yang State Key Laboratory of Estuarine and Coastal Research, Center for Blue Carbon Science and Technology, East China Normal University
Faming Wang South China Botanical Garden, Chinese Academy of Sciences
Jianwu Tang State Key Laboratory of Estuarine and Coastal Research, Center for Blue Carbon Science and Technology, East China Normal University
Ji Chen State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences
Hongkai Zhou College of Coastal Agricultural Sciences, Guangdong Ocean University / South China Branch of National Salt-Alkali Tolerant Rice Technology Innovation Center
Ying Huang State Key Laboratory of Estuarine and Coastal Research, Center for Blue Carbon Science and Technology, East China Normal University
Xuechu Chen Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University
Xiuzhen Li State Key Laboratory of Estuarine and Coastal Research, Center for Blue Carbon Science and Technology, East China Normal University
Zhenming Ge State Key Laboratory of Estuarine and Coastal Research, Center for Blue Carbon Science and Technology, East China Normal University
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重要日期

  • 会议日期

    01月13日

    2025

    至

    01月17日

    2025

  • 09月27日 2024

    初稿截稿日期

  • 01月17日 2025

    注册截止日期

主办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
承办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
Department of Earth Sciences, National Natural Science Foundation of China
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