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Assessing the equity and efficiency of crop and livestock-related agricultural greenhouse gas emissions contributes to achieving regionally differentiated emission mitigation
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DOI：10.1016/j.pce.2026.104417.png)
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Abstract
En 中文
Understanding China's agricultural greenhouse gas (GHG) balance and equitable mitigation is critical for achieving sustainability. This study quantifies provincial agricultural net GHG emissions for 2000-2021, focusing on crop planting and livestock breeding sectors (excluding forestry and fisheries). We accounting for CO2 and non-CO2 sources, and crop carbon sequestration across 31 provinces using emission factors. A novel framework, utilizing ecological support coefficient (ESC) and economy contributive coefficient (ECC) was employed to evaluate inter-provincial equity and efficiency. Results from trend analysis (Mann-Kendall test) confirmed a statistically significant downward trend in net emissions (Z = -6.09,p < 0.001), with an average annual reduction of 44.29 MtCO(2)-eq (Sen's slope). Furthermore, Pettitt's test identified 2010 as a significant structural breakpoint (p < 0.001). Methane (CH4) dominated emissions (44.51%), mainly from enteric fermentation and rice paddies; planting activities contributed more than livestock (65.95%). Spatially, emissions showed a distinct pattern of higher levels in the east and lower in the west. Equity is higher in northern provinces, while efficiency is superior in southern regions. These insights provide a robust foundation for provincial reduction priorities, informing differentiated, equitable, and efficient agricultural climate mitigation strategies for China.
Keywords:
Agriculture GHG emissions
Equity
Efficiency
Emission mitigation
Regional differentiation
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