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替代牛肉生产系统对气候的影响取决于所使用的功能单位:重量或货币价值

Tong Wang¹, Urs Kreuter², Christopher Davis³

¹Ness School of Management & Economics, South Dakota State University, Brookings, SD 57007.

Proceedings of the National Academy of Sciences of the United States of America

|July 15, 2024

概括

北美牛肉生产产生的温室气体 (GHG) 排放量差异很大. 土壤碳封存为减少温室气体排放提供了最大的潜力,突出了其在缓解战略中的重要性.

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:

牛肉生产是农业温室气体 (GHG) 排放的主要贡献者.
北美约占全球牛肉供应的25%,使其生产系统具有重要意义.
了解温室气体排放变化对于制定有效的减排策略至关重要.

研究的目的:

为了比较替代牛肉生产系统的温室气体排放贡献.
分析各种策略的减缓潜力.
评估不同的指标来评估牛肉生产中的碳强度.

主要方法:

进行了2001年至2023年间发表的32项研究的元分析.
分析了美国和加拿大的牛肉生产温室气体排放数据.
使用每重量和每经济活动指标进行碳强度比较.

主要成果:

北美牛肉生产的温室气体排放量在10.2至37.6公斤二氧化碳每公斤尸体重量 (CW) 之间,平均为21.4公斤二氧化碳每公斤CW.
土壤碳封存显示了最大的缓解潜力 (80%),其次是增长增强 (16%),饮食修改 (6%) 和放牧管理 (7%).
草地加工的牛肉与料场加工的牛肉相比,每项经济活动的碳强度较低,尽管与基于重量的指标有积极的关联.

结论:

土壤碳捕获和土地管理是评估牛肉对环境影响的关键因素.
使用每项经济活动的碳强度为生产系统效率提供了不同的视角.
准确的温室气体排放评估需要纳入土地利用,管理和土壤碳捕获.

关键词:

牛肉生产牛肉生产碳封存是一种碳封存方式.料的完成 - 料的完成草地装修完成草地装修完成温室气体排放量排放量温室气体排放量排放量

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