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| 长江经济带淡水养殖单位面积产量、碳排放规律及空间差异 |
| Per unit area yield， carbon emissions， and spatial differences of freshwater aquaculture in the Yangtze River Economic Belt |
| 投稿时间：2023-03-14 |
| DOI：10.13254/j.jare.2023.0159 |
| 中文关键词: 长江经济带，淡水养殖，温室气体，养殖模式，空间特征 |
| 英文关键词: the Yangtze River Economic Belt, freshwater aquaculture, greenhouse gas（GHG）, aquaculture mode, spatial characteristics |
| 基金项目:国家自然科学基金项目（U20A2047） |
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| 中文摘要: |
| 淡水渔业资源是长江经济带重要的资源之一，但快速发展的淡水养殖强烈影响着水体CH4和N2O的排放，进而造成环境危害。本研究基于全国和地方渔业统计年鉴构建了2019年长江经济带县级尺度的渔业数据库，解析了长江经济带淡水养殖单位面积产量及空间差异，并根据建立的数据库综合分析了淡水养殖模式温室气体排放的特征。结果显示，2019年长江经济带中游淡水养殖单位面积产量最高，为6.9 t·hm-2，下游最低，约为6.0 t·hm-2。整合温室气体排放数据发现，长江经济带淡水养殖总温室气体排放量为1.5×107 （t以CO2e计），其中粗放型和半集约化养殖模式排放量最高，约占总排放量的66.8%，集约化排放量占比最少，约占4.5%。因此，发展绿色养殖模式、减缓温室气体排放是实现长江经济带淡水养殖可持续发展的关键途径。 |
| 英文摘要: |
| Freshwater is an important resource in the Yangtze River Economic Belt. However, freshwater aquaculture causes the emission of methane and nitrous oxide, and excessive emissions can induce environmental pollution. In this study, a county-wide fishery database of the Yangtze River Economic Belt in 2019 was constructed based on the national and local fishery statistical yearbook, which was used to analyze the spatial and production differences of freshwater aquaculture. Here, a life cycle analysis method was employed to analyze the greenhouse gas（GHG）emission characteristics of the Yangtze River Economic Belt. Fishery database analysis revealed that aquaculture production was 6.9 t · hm-2 in the midstream, and 6.0 t · hm-2 downstream, of the Yangtze River Economic Belt in 2019. Due to the differences in the GHG emission factor, aquaculture production, and electricity consumption, there was a significant spatial difference in GHG emissions from freshwater aquaculture systems. In the Yangtze River Economic Belt, the total greenhouse gas emissions from freshwater aquaculture amount to 1.5×107 t CO2e equivalent. Among these, extensive and semi-intensive aquaculture system contribute the highest emissions, accounting for approximately 66.8% of the total emissions, while intensive aquaculture system contribute the least, constituting around 4.5% of the total emissions. Therefore, enhancing green aquaculture system and mitigating greenhouse gas emissions are critical pathways to achieve sustainable development in freshwater aquaculture system within the Yangtze River Economic Belt. |
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