| 梅威,武慧君,方维鑫,朱慧敏.稻虾共作模式碳氮足迹分析——以淮南市为例[J].农业环境科学学报,2024,43(12):3022-3033. |
| 稻虾共作模式碳氮足迹分析——以淮南市为例 |
| Carbon and nitrogen footprints of rice-crayfish coculture: a case study of Huainan City, China |
| 投稿时间：2024-05-06 |
| DOI：10.11654/jaes.2024-0387 |
| 中文关键词: 碳足迹 氮足迹 生命周期 稻虾共作 情景分析 |
| 英文关键词: carbon footprint nitrogen footprint life cycle rice-crayfish coculture scenario analysis |
| 基金项目:国家自然科学基金面上项目（72074003） |
|
| 摘要点击次数: 438 |
| 全文下载次数: 437 |
| 中文摘要: |
| 为探究稻虾共作模式碳氮足迹的主要影响因素及其优化潜力，本研究基于实地调研、文献和生命周期数据库中的数据，从生命周期的角度采用碳氮足迹理论分析了稻虾共作模式的碳氮足迹，并依据结果进行情景分析。结果表明：稻虾共作模式的单位面积碳足迹、单位产值碳足迹和单位利润碳足迹分别为16 137.92 kgCO2e·hm-2、0.19 kg CO2e·元-1和0.48 kg CO2e·元-1，其中CH4排放（50.5%）和灌溉电力（17.7%）是碳足迹最主要的贡献者；稻虾共作模式的单位面积氮足迹、单位产值氮足迹和单位利润氮足迹分别为104.85 kg Nr·hm-2、1.24×10-3 kg Nr·元-1和3.15×10-3 kg Nr·元-1，其中NH3排放（45.5%）、田间氮素的淋溶（22.2%）和径流损失（12.6%）是氮足迹的主要贡献者。结合碳氮足迹的分析结果进行情景分析表明：未来综合采用秸秆不还田、光伏发电及免耕技术、机插同步侧深施肥技术可有效减少CH4排放、提高清洁能源利用率和减少氮素投入，使单位面积碳足迹、单位产值碳足迹和单位利润碳足迹分别降低27.5%、30.4%和38.5%，单位面积氮足迹、单位产值氮足迹和单位利润氮足迹分别降低25.8%、28.7%和37%。研究表明，通过综合采用秸秆不还田、光伏发电及免耕技术、机插同步侧深施肥技术可有效降低稻虾共作模式碳氮足迹。 |
| 英文摘要: |
| To investigate the primary influencing factors of the carbon and nitrogen footprints in the rice-crayfish coculture and its potential for optimization, based on data from field investigation, literature, and life cycle databases, we used the carbon and nitrogen footprint theories to analyze the carbon and nitrogen footprints of the rice-crayfish coculture from a life-cycle perspective. We also conducted the scenario analysis with the results. The results showed that the carbon footprint per unit area, the carbon footprint per unit production value, and the carbon footprint per unit profit of the rice-crayfish coculture were 16 137.92 kg CO2e·hm-2, 0.19 kg CO2e·yuan-1, and 0.48 kg CO2e·yuan-1, respectively. CH4 emissions（50.5%）and irrigation electricity（17.7%）were the most important contributors to the carbon footprint. The nitrogen footprint per unit area, the nitrogen footprint per unit production value, and the carbon footprint per unit profit of the rice-crayfish coculture were 104.85 kg Nr · hm-2, 1.24×10-3 kg Nr · yuan-1, and 3.15×10-3 kg Nr · yuan-1, respectively. NH3 emission （45.5%）, nitrogen leaching（22.2%）, and runoff（12.6%）were the main contributors to the nitrogen footprint. Combined with the analysis results of carbon and nitrogen footprints, the scenario analysis showed that in the future, integrated use of non-returned straw, photovoltaic power generation and no-tillage technology, as well as rice transplanter-integrated lateral deep fertilization technology could effectively reduce CH4 emissions, improve the utilization rate of clean energy and reduce nitrogen input, thereby reducing the carbon footprint per unit area, carbon footprint per unit production value and carbon footprint per unit profit by 27.5%, 30.4% and 38.5%, respectively. They could also reduce the nitrogen footprint per unit area, nitrogen footprint per unit production value and nitrogen footprint per unit profit by 25.8%, 28.7% and 37%, respectively. Therefore, the integrated application of non-returned straw, photovoltaic power generation and no-tillage technology, as well as rice transplanter-integrated lateral deep fertilization technology can effectively reduce the carbon and nitrogen footprints of the rice-crayfish coculture. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
|
|
|
