Emission Characteristics, Co-Drivers, and Mitigation Implications of NH3, N2O, and CH4 from Livestock Manure in China from 2013 to 2023
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Summary
This summary is machine-generated.Livestock manure in China released less ammonia but more nitrous oxide and methane from 2013-2023, increasing overall global warming potential. Hogs were the main source, with affluence and technology driving emissions.
Area Of Science
- Environmental Science
- Agricultural Science
- Climate Science
Background
- Livestock and poultry manure are significant sources of ammonia (NH3), nitrous oxide (N2O), and methane (CH4) emissions.
- These emissions contribute to both climate forcing and air quality degradation.
- Integrated assessments of these multiple pollutants across species and regions in China are limited.
Purpose Of The Study
- To establish a coupled provincial inventory of NH3, N2O, and CH4 emissions from livestock manure in China for 2013-2023.
- To identify the socioeconomic drivers influencing these emissions using the Logarithmic Mean Divisia Index (LMDI).
- To provide insights for targeted mitigation strategies addressing both carbon neutrality and air quality.
Main Methods
- Development of a coupled provincial inventory for livestock manure emissions (NH3, N2O, CH4) from 2013-2023.
- Application of the Logarithmic Mean Divisia Index (LMDI) for socioeconomic driver analysis.
- Quantification of aggregated global warming potential (GWP) in CO2-equivalent (CO2-eq).
Main Results
- NH3 emissions slightly decreased (-3.7%), while N2O (+9.5%) and CH4 (+35%) emissions significantly increased.
- The aggregated GWP from livestock manure rose by approximately 24% (from ~1100 to ~1370 Tg CO2-eq).
- Hogs were the dominant contributor across all gases; affluence and technological intensification were key drivers, partially offset by efficiency gains.
Conclusions
- Despite a slight decrease in ammonia, rising nitrous oxide and methane emissions from livestock manure are increasing China's climate forcing.
- Regional disparities exist, with high-emission provinces disproportionately contributing.
- Integrated mitigation strategies are crucial, considering socioeconomic drivers like affluence and technology, to simultaneously improve air quality and achieve carbon neutrality.
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