概括
草甘在农业中的使用每年产生97.6亿公斤的CO2e排放. 然而,它促进了保护性耕作,显著减少了419.3亿公斤的二氧化碳排放,相当于将2180万辆汽车从道路上移除.
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:
- 草甘是全球农业中广泛使用的除草剂.
- 农业实践显著影响温室气体排放,特别是二氧化碳等价物 (CO2e).
- 保护性耕作方法,包括减少耕作和不耕作,与传统耕作相比,有可能减少排放.
研究的目的:
- 为了估计与草甘生产和使用相关的年度全球CO2e排放量.
- 通过采用保护性耕作来量化草甘促进的CO2e排放减少.
- 为了比较保护性耕种与传统耕种的净二氧化碳排放.
主要方法:
- 全球草甘活性成分的年度计算使用和应用区域.
- 来自草甘制造,分销和农场级应用的量化CO2e排放.
- 估计的二氧化碳排放量和土壤碳保留,用于保护耕作和传统耕作系统.
- 归因于草甘在促进保护性耕作中的作用.
主要成果:
- 全球每年的草甘使用量为749.27亿公斤,导致97.6亿公斤的CO2e排放.
- 与传统耕作相比,保护性耕作实践带来了179.67亿公斤CO2e的净减少.
- 可归因于草甘的保护性耕作导致每年净减少-41.93亿公斤二氧化碳.
- 这一减少相当于每年从道路上移除2180万辆汽车.
结论:
- 虽然草甘的生产和使用产生二氧化碳排放,但其在保护耕作中的作用导致了大幅度的温室气体净减排.
- 草甘促进的转向保护性耕作,与传统耕作相比,大大减轻了气候影响.
- 草甘对保护性耕作的贡献,在减轻二氧化碳排放方面,代表了显著的环境效益.
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