不连续的洪水超越了持续的水灾在田净碳封存尽管在土壤有机碳封存损失
Yu Hou1,2, Jingwen Zhang1, Junjie Guo3
1Guangdong Key Laboratory of Marine Civil Engineering, School of Civil Engineering, Sun Yat-sen University, Zhuhai, Guangdong, China.
Global change biology
|June 3, 2025
概括
在大米田中不连续的洪水 (NCF) 增加了每季净碳捕获 (NCS) 的4615公斤CO2-eq·ha-1. 这种做法减少了甲排放,同时略微增加了氧化,为米种植提供了一种可持续的方法.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 气候科学 气候科学
背景情况:
- 大米种植是温室气体 (GHG) 排放的主要来源.
- 非连续洪水 (NCF) 是一个节水技术在水田.
- 缺乏对NCF对净碳捕获 (NCS) 影响的全面评估.
研究的目的:
- 量化NCF对温室气体排放和NCS在田中的所有组成部分的影响.
- 与连续洪水 (CF) 相比,评估NCF对NCS的整体好处.
- 在NCF管理下识别影响温室气体排放和NCS的因素.
主要方法:
- 来自72项全球研究的1075对数据对的元分析.
- 量化甲 (CH4),氧化 (N2O),二氧化碳 (CO2) 排放量,作物产量和土壤有机碳 (SOC) 的变化.
- 进行元回归和随机森林分析,以探索影响因素.
主要成果:
- 与CF相比,NCF每季平均NCS增加了4615公斤的CO2-eq·ha-1显著.
- NCF将CH4排放量减少了45.72%,但N2O排放量增加了35.77%.
- NCF显示二氧化碳排放和产量增加不大,SOC变化较小.
结论:
- NCF提高了大米田的净碳捕获,有助于减缓气候变化.
- 在NCF中进行控制灌可以优化大米产量并降低全球变暖潜力 (GWP).
- NCF为可持续的米生产和实现双碳目标提供了一个可行的战略.
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