Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences, Beijing, 100081, China; Key Laboratory of Green and Low Carbon Agriculture in North China Plain, Ministry of Agriculture and Rural Development, Beijing, 100081, China.
Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
Environ Res. 2024 Dec 15;263(Pt 3):120269. doi: 10.1016/j.envres.2024.120269. Epub 2024 Oct 30.
Effective livestock manure management is crucial for carbon neutrality. Scientific accounting methods and integrated management strategies can help guide reductions in carbon emissions and promote green development. To reduce greenhouse gas emissions by livestock manure, this study analyzed current accounting systems and focused on the complete chain of "collection-treatment-storage-use-returning" of manure based on the theoretical framework of greenhouse gas emissions accounting in the IPCC 2019 Guidelines. Combined with a life cycle assessment, the accounting list and boundaries were clarified, and the whole chain of livestock and poultry manure greenhouse gas accounting methodology system was proposed. Using swine breeding as a case study, this study evaluated the carbon emission reduction and sequestration effect of the whole manure chain using a typical technology model and a typical technological framework. It predicted the carbon reduction potential and sequestration benefits of utilizing swine manure in 2025 and 2030 in four scenarios. The findings indicated that the greenhouse gas emission factor of the whole chain of the six typical swine manure utilization modes in China was -48.82-40.54 kgCOet. In 2022, the net greenhouse gas emissions from swine manure in China totaled approximately 2.0 × 10 tCOe, with manure resource utilization reducing emissions by 3.2 × 10 tCOe. Our projections suggest that emissions from swine manure in China may range from -1.8 × 10 to 1.3 × 10 tCOe by 2025 and from -3.1 × 10 to 4.5 × 10 tCOe by 2030. This can help guide optimal greenhouse gas emission reduction pathways for livestock and poultry farming and aid in the formulation of policies.
有效的牲畜粪便管理对于实现碳中和至关重要。科学的核算方法和综合管理策略可以帮助减少碳排放，促进绿色发展。为了减少牲畜粪便的温室气体排放，本研究分析了现行的核算体系，以《IPCC 2019 年温室气体排放核算指南》中的温室气体排放核算理论框架为基础，聚焦于粪便的“收集-处理-储存-利用-还田”全链条。结合生命周期评价，明确了核算清单和边界，提出了畜禽粪便温室气体核算方法体系的全链条。本研究以生猪养殖为例，利用典型技术模型和技术框架，评估了整个粪便链的碳减排和固碳效果，并在四个情景下预测了 2025 年和 2030 年利用猪粪的碳减排潜力和固碳效益。结果表明，中国 6 种典型猪粪利用模式全链条的温室气体排放因子为-48.82-40.54 kgCOet。2022 年，中国猪粪温室气体净排放量约为 2.0×10 tCOe，粪便资源利用减排 3.2×10 tCOe。预测到 2025 年，中国猪粪温室气体排放量可能在-1.8×10 tCOe 到 1.3×10 tCOe 之间波动，到 2030 年可能在-3.1×10 tCOe 到 4.5×10 tCOe 之间波动。这有助于为畜牧业制定最佳的温室气体减排路径和政策提供指导。
