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| 长江中下游典型水旱轮作农田温室气体排放特征 |
| Characteristics of greenhouse gas emissions from typical paddy-upland rotation farmlands in the middle and lower reaches of the Yangtze River |
| Received:August 04, 2025 |
| DOI：10.13254/j.jare.2025.0786 |
| 中文关键词: 长江中下游，温室气体，水旱轮作，全球增温潜势，排放强度 |
| 英文关键词: middle and lower reaches of the Yangtze River, greenhouse gas, paddy-upland rotation, global warming potential, emission intensity |
| 基金项目:国家重点研发计划项目（2022YFD1700700）；湖北省农业科技创新中心项目（2024-620-000-001-012） |
| Author Name | Affiliation | E-mail | | Yuan Zhuangzhi | Institute of Plant Protection and Soil Fertility, Hubei Academy of Agricultural Sciences, Station for Agro-Environment, Ministry of Agriculture and Rural Affairs, Hubei Engineering Research Center for Agricultural Non-point Source Pollution Control, Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China | | | Huang Min | School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China | | | Lu Wenlong | Institute of Plant Protection and Soil Fertility, Hubei Academy of Agricultural Sciences, Station for Agro-Environment, Ministry of Agriculture and Rural Affairs, Hubei Engineering Research Center for Agricultural Non-point Source Pollution Control, Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China | | | Peng Chengliang | Institute of Plant Protection and Soil Fertility, Hubei Academy of Agricultural Sciences, Station for Agro-Environment, Ministry of Agriculture and Rural Affairs, Hubei Engineering Research Center for Agricultural Non-point Source Pollution Control, Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China | | | Li Qian | Institute of Plant Protection and Soil Fertility, Hubei Academy of Agricultural Sciences, Station for Agro-Environment, Ministry of Agriculture and Rural Affairs, Hubei Engineering Research Center for Agricultural Non-point Source Pollution Control, Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China
College of Resources and Environment, Huazhong Agricultural University, Wuhan 430064, China | | | Wu Maoqian | Institute of Plant Protection and Soil Fertility, Hubei Academy of Agricultural Sciences, Station for Agro-Environment, Ministry of Agriculture and Rural Affairs, Hubei Engineering Research Center for Agricultural Non-point Source Pollution Control, Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China | | | Ni Chengfan | Institute of Plant Protection and Soil Fertility, Hubei Academy of Agricultural Sciences, Station for Agro-Environment, Ministry of Agriculture and Rural Affairs, Hubei Engineering Research Center for Agricultural Non-point Source Pollution Control, Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China | | | Xia Ying | Institute of Plant Protection and Soil Fertility, Hubei Academy of Agricultural Sciences, Station for Agro-Environment, Ministry of Agriculture and Rural Affairs, Hubei Engineering Research Center for Agricultural Non-point Source Pollution Control, Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China | xiayinghappy105@163.com |
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| 中文摘要: |
| 为明确长江中下游水旱轮作模式下农田温室气体排放规律及关键排放期，本研究于2023—2024年在湖北省农业科学院鄂州基地开展了野外径流小区试验。试验设置了稻油轮作（水稻-油菜）、稻麦轮作（水稻-小麦）、稻肥轮作（水稻-紫云英）、稻菜轮作（水稻-莴苣）四种处理，并采用静态暗箱法测定大气-土壤界面温室气体的排放或吸收速率，以探明不同水旱轮作模式下农田温室气体排放特征和规律。结果表明，不同水旱轮作模式温室气体的主要排放时期和排放模式存在差异。CO2排放峰值出现在水稻季和旱季作物收获前，呈现升温-响应排放特征；CO2累计排放量最高的是稻麦轮作，其CO2累计排放量为5.6×104 kg·hm-2。CH4排放的主要时期为水稻季的分蘖期和复水后的孕穗期初期，稻季 CH4排放显著高于旱季；水稻季各轮作模式中稻麦轮作的CH4累计排放量最高。N2O主要排放期为旱季施肥期，施肥后出现显著N2O排放高峰，各轮作模式旱季N2O累计排放量最高为稻菜轮作，其排放量为2.70 kg·hm-2。稻油轮作、稻肥轮作、稻菜轮作和稻麦轮作的综合温室效应（GWP）分别为5.5×104、4.8×104、4.5×104 kg CO2-eq·hm-2和 5.8×104 kg CO2-eq·hm-2，相较于 GWP 最高的稻麦轮作，稻油轮作、稻肥轮作、稻菜轮作 GWP 分别降低了5.0%、17.4%和21.4%。综上，长江中下游水旱轮作农田CO2排放风险期为水稻季和旱季作物收获前，CH4排放的风险期为水稻季的分蘖期和孕穗期初期，N2O排放的风险期为旱季施肥期。本研究为长江中下游不同水旱轮作模式温室气体精准减排提供数据支撑。 |
| 英文摘要: |
| In order to clarify the greenhouse gas emission patterns and key emission period of farmland under the paddy-upland rotation mode in the middle and lower reaches of the Yangtze River, the research team conducted a field runoff plot experiment at the Ezhou base of Hubei Academy of Agricultural Sciences from 2023 to 2024. Four treatments were set up in the experiment, including rice-rape rotation （rice-rape）, rice-wheat rotation（rice-wheat）, rice-fertilizer rotation（rice-Chinese milk vetch）, and rice-vegetable rotation（rice-lettuce）. The static closed chamber method was used to determine the emission or absorption rate of greenhouse gases at the atmosphere-soil interface to explore the characteristics and patterns of farmland greenhouse gas emissions under different paddy-upland rotation modes. The results showed that there were differences in the main emission periods and patterns of greenhouse gases among different paddy-upland rotation modes. The CO2 emission peaks occurred during the rice season and before the harvest of dry-season crops, showing temperature rise-responsive emission characteristics. The rice-wheat rotation had the highest cumulative CO 2 emissions, reaching 5.6×104 kg·hm-2. The main CH4 emission periods were the tillering stage of the rice season and the early booting stage after rewatering, CH 4 emissions in the rice season were significantly higher than those in the dry season, respectively. Among all rotation modes in the rice season, the rice-wheat rotation had the highest cumulative CH4 emissions.The main N2O emission period was the fertilization period in the dry season, with a significant N2O emission peak after fertilization. The rice-vegetable rotation had the highest cumulative N2O emissions in the dry season among all rotation modes, reaching 2.70 kg·hm-2.The global warming potential（GWP）of rice-rape rotation, rice-fertilizer rotation, rice-vegetable rotation and rice-wheat rotation were 5.5 × 104, 4.8 × 104, 4.5 × 104 and 5.8 × 104 kg CO2-eq·hm-2, respectively. Compared with the rice-wheat rotation with the highest GWP, the GWP of rice-rape rotation, rice-fertilizer rotation and rice-vegetable rotation decreased by 5.0%, 17.4% and 21.4%, respectively.To summarize, the high-risk periods for CO2 emissions from paddy-upland rotation farmlands in the middle and lower reaches of the Yangtze River are the rice season and before the harvest of dry-season crops. The high-risk periods for CH4 emissions are the tillering stage and early booting stage of the rice season. The high-risk period for N2O emissions is the fertilization period in the dry season.This study provides data support for targeted greenhouse gas emission reduction under different paddy-upland rotation modes in the middle and lower reaches of the Yangtze River. |
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