海洋渔业2025，Vol.47Issue(5)：599-609,11.
江苏省典型淡水鱼类养殖模式温室气体排放特征及减排策略
Greenhouse gas emission characteristics and mitigation pathways of freshwater fish aquaculture models in Jiangsu Province
摘要
Abstract
To systematically evaluate the greenhouse gas GHG emission characteristics of freshwater fish aquaculture in Jiangsu Province and elucidate the impact of aquaculture models on carbon emission efficiency,this study conducted a comprehensive one-year in situ monitoring experiment across six representative aquaculture models.Utilizing a province-wide monitoring network spanning southern,central,and northern Jiangsu,we employed static dark chamber-gas chromatography to quantify emissions.By integrating yield-scaled emission factors(EF-Y)and protein carbon footprint(PCF)models with the IPCC AR6 global warming potential(GWP)accounting framework,we established a spatially and temporally resolved GHG emission inventory.Key findings revealed:1)Farming model comparisons:Monoculture systems exhibited significantly higher emission intensities than polyculture systems.Perch monoculture demonstrated a per-yield emission intensity of(2.44±0.61)t CO2-eq·t-1,2.35 times that of grass carp-crucian carp polyculture(P＜0.05).Its protein carbon footprint(23.00±0.69)t CO2-eq·t-1 reached 2.82 times that of blunt snout bream monoculture,highlighting the environmental inefficiency of single-species intensive farming.2)Mitigation potential:The grass carp-crucian carp polyculture system reduced direct CO2,CH4,and N2O emission coefficients by 11.7％-43.6％compared to crucian carp monoculture.3)Spatiotemporal dynamics:Emissions displayed strong seasonal variability,with July-September contributing 62％of annual CH4 emissions.Channel catfish monoculture exhibited summer-autumn CO2 flux peaks,while perch monoculture showed the highest summer N2 O emission intensity,likely linked to temperature-driven microbial activity and feed residue accumulation.4)Regional emission inventory:In 2023,Jiangsu's freshwater aquaculture emitted 1.91×107 t CO2-eq.Spatial analysis identified four major emission hotspots:Yancheng,Nantong,Lianyungang,and Yangzhou,collectively responsible for 54.82％of provincial emissions.In contrast,Wuxi and Zhenjiang demonstrated lower emission intensities,attributable to smaller farming scales and optimized management practices.These findings underscore the critical need for differentiated emission reduction strategies.We propose a three-tier mitigation framework:1)Large-scale adoption of grass carp-crucian carp polyculture in high-emission regions;2)Development of low-protein,high-efficiency feed formulations targeting perch and channel catfish monoculture models;3)Implementation of real-time aeration systems during summer-autumn metabolic peaks.Furthermore,incorporating aquaculture ponds into provincial GHG inventories using localized emission factors-rather than generic IPCC values-could reduce estimation uncertainties by 22％-35％based on our sensitivity analysis.This approach provides both scientific foundations and technical pathways for achieving carbon neutrality in China's aquaculture sector while maintaining food security.关键词
温室气体/淡水鱼/养殖模式/排放特征/碳中和Key words
greenhouse gases/freshwater fish/aquaculture models/emission characteristics/carbon neutrality分类
资源环境引用本文复制引用
朱林,车轩,刘兴国,刘一萌,陈宏远,孟展鹏,孙淳..江苏省典型淡水鱼类养殖模式温室气体排放特征及减排策略[J].海洋渔业,2025,47(5):599-609,11.基金项目
江苏省重点研发项目(BE2022421) （BE2022421）
国家重点研发计划课题(2023YFD2400905) （2023YFD2400905）
中国水产科学研究院中央级公益性科研院所基本科研业务费专项资金(NO.2023TD67) （NO.2023TD67）
