不同使用LCA的基于大米的种植系统的碳足迹和温室气体排放
Mohammad Mofizur Rahman Jahangir1,2, Eduardo Aguilera3, Jannatul Ferdous4
1Department of Soil Science, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh. mmrjahangir@bau.edu.bd.
Scientific reports
|March 26, 2025
概括
温室气体 (GHG) 的排放量在孟加拉国各种作物系统中各不相同. 米系统显示高甲排放,而那些干地作物发射更多的氧化,影响整体碳足迹.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 气候变化研究 气候变化研究
背景情况:
- 洪平地土壤拥有多样化的作物系统,但它们的温室气体 (GHG) 排放平衡报告不足.
- 了解农产品的碳 (C) 足迹对于开发可持续实践至关重要.
研究的目的:
- 评估孟加拉国主要作物系统的温室气体排放平衡和碳足迹.
- 为了在不同农业系统中比较温室气体排放 (氧化和甲).
- 为了潜在的温室气体减缓,确定具有较低碳足迹的作物系统.
主要方法:
- 为农业碳足迹分析共同设计的生命周期评估 (LCA) 工具.
- 对选定的作物系统的温室气体排放进行现场测量.
- 种植系统的分析,包括大米-大米-大米,大米-大米,玉米-大米,小麦-豆-大米和土豆-大米.
主要成果:
- 与干旱土地作物的作物系统相比,单独的水系统显示出更高的氧化 (N2O) 排放量.
- 在大米系统中,甲 (CH4) 排放占主导地位 (50-80%),显示出与N2O相反的趋势.
- 基于博罗大米的系统具有最高的C足迹,而土豆-大米-荒地和玉米-荒地-大米系统具有最低的C足迹.
结论:
- 米和米种植似乎更适合减少整体碳足迹.
- 关于CH4和N2O的IPCC一级估计与现场测量非常一致.
- 进一步研究跨多种农业生态系统的温室气体测量对于有效的缓解策略至关重要.
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