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| 再生稻不同留桩高度下秸秆还田对再生季温室气体排放的影响 |
| Effects of straw return on greenhouse gas emissions of ratoon season under different stubble heights in ratoon rice production |
| Received:July 04, 2025 |
| DOI：10.13254/j.jare.2025.0668 |
| 中文关键词: 再生稻，秸秆管理，甲烷，氧化亚氮，全球增温潜势，温室气体排放强度，留桩高度，产量 |
| 英文关键词: ratoon rice, straw management, methane, nitrous oxide, global warming potential, greenhouse gas emission intensity, stubble height, yield |
| 基金项目:国家重点研发计划项目（2023YFD1900600）；湖北省科技厅国际科技合作项目（2024EHA059）；中国农业科学院科技创新工程项目；武汉市自然科学基金探索计划项目（2024040801020290） |
| Author Name | Affiliation | E-mail | | Wang Xuejie | National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, MARA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China | | | Wu Xiangning | National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, MARA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China | | | Ning Kexin | National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, MARA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China | | | Zhang Lu | College of Economics and Management, South China Agricultural University, Guangzhou 510651, China | | | Agustiani Nurwulan | Research Center for Food Crop, National Research and Innovation Agency, Jawa Barat 16915, Indonesia | | | Huang Jianliang | National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, MARA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China | | | Peng Shaobing | National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, MARA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China | | | Wang Bin | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | wangbin01@caas.cn | | Yuan Shen | National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, MARA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China | syuan@mail.hzau.edu.cn |
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| 中文摘要: |
| 为明确再生稻头季收获后留桩高度和秸秆管理对再生季产量和温室气体排放的影响，本研究在湖北省孝感市云梦县开展裂区设计大田试验，主区为秸秆管理（秸秆还田与不还田），副区为留桩高度[低留桩（25 cm）和高留桩（45 cm）]，供试品种为籼粳杂交稻甬优4949。考察不同处理对再生季产量及产量构成因子、甲烷（CH4）和氧化亚氮（N2O）排放规律及累积排放量、全球增温潜势（GWP）和温室气体排放强度（GWPi）的影响。结果表明：（1）秸秆管理对再生季产量的效应受留桩高度显著影响。在低留桩下，秸秆还田处理的产量（6.91 Mg·hm-2）较不还田提高 25.6%；高留桩下，不同秸秆处理再生季产量没有显著差异；（2）再生季的CH4和 N2O 的排放通量存在较大差异。CH4排放头季收获后开始逐渐增加，齐穗期达到峰值，随后逐渐下降，成熟期降至较低水平。N2O排放整体水平较低，时序变异性较大，主要集中在再生季生育中期；（3）秸秆还田显著增加CH4排放及GWP和GWPi，且低留桩下增幅更大，其中CH4、GWP和GWPi分别提高165.9%、163.6%和116.0%。高留桩下相应增幅分别为77.0%、81.9%和76.2%。N2O累积排放对处理差异不敏感。综上，秸秆还田有助于提升再生季产量，但也显著增加甲烷排放，尤其在低留桩下更为突出。建议在实际生产中，高留桩结合减排措施优化秸秆管理策略，实现再生稻的高产与低碳协同。 |
| 英文摘要: |
| To clarify the effect of stubble height and straw management after the harvest of the main season on rice yield and greenhouse gas emissions of the ratoon season, this study conducted a split-plot field experiment in Yunmeng County, Xiaogan City, Hubei Province. The main plots were straw management managements（straw return vs. no straw return）, and the subplots were stubble height treatments [low stubble height（25 cm）and high stubble height（45 cm）]. The tested variety was Yongyou 4949, an indica-japonica hybrid rice widely cultivated for ratoon rice production in central China. The study aimed to determine the effect of different treatments on ratoon season yield and its components, the emission patterns and cumulative fluxes of methane（CH4）and nitrous oxide（N2O）, global warming potential （GWP）and greenhouse gas emission intensity（GWPi）. The results showed that：（1）The effect of straw management on ratoon season yield was significantly influenced by stubble height. Under low stubble height（25 cm）, straw return increased yield by 25.6%（6.91 Mg· hm-2）compared to straw removal, while demonstrating no statistically significant yield differences between straw managements at high stubble height;（2）During the ratoon season's growth period, significant variations were observed in the emission fluxes of CH4 and N2O across different treatments. CH4 emission fluxes began to increase gradually after the harvest of the main season, reached peak levels at the heading stage, and then declined steadily to relatively low levels by maturity stage. However, N2O emission fluxes remained relatively low overall, exhibiting greater temporal variability, with emissions primarily concentrated during the mid-growth stage of the ratoon season;（3） Straw return significantly increased CH4 emissions, GWP, and GWPi, with greater increments observed under low stubble height. Specifically, CH4 emissions, GWP, and GWPi increased by 165.9%, 163.6%, and 116.0%, respectively, compared to straw removal. Under high stubble condition, straw return increased CH4 emissions, GWP, and GWPi by 77.0%, 81.9%, and 76.2%, respectively. For N2O emissions no significant differences were detected among treatments. In summary, straw return helped increase yield in ratoon season but also significantly intensified CH4 emissions, especially under low stubble height conditions. For practical production, it is important to combine mitigation measures with optimized straw and high stubble height management to achieve both high yield and low emissions in ratoon rice. |
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