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| 重庆市烟草-玉米轮作系统碳足迹研究——基于生命周期评价 |
| Carbon footprint of the tobacco-maize cropping system in Chongqing: based on life cycle assessment |
| Received:November 06, 2023 |
| DOI：10.13254/j.jare.2023.0700 |
| 中文关键词: 碳足迹，生命周期评价，轮作，烟草，玉米 |
| 英文关键词: carbon footprint, life cycle assessment, rotation system, tobacco, maize |
| 基金项目:重庆中烟工业有限责任公司资金项目（YL202202） |
| Author Name | Affiliation | E-mail | | PENG Kui | Chongqing China Tobacco Industry Co., Ltd., Chongqing 400060, China | | | ZHENG Yu | College of Tobacco Science, Henan Agricultural University, Zhengzhou 450046, China | | | HE Rong | Chongqing China Tobacco Industry Co., Ltd., Chongqing 400060, China | | | XIAO Qingli | Chongqing China Tobacco Industry Co., Ltd., Chongqing 400060, China | | | YUAN Ming | Chongqing China Tobacco Industry Co., Ltd., Chongqing 400060, China | | | TAN Qizhong | Chongqing China Tobacco Industry Co., Ltd., Chongqing 400060, China | | | WANG Jianlin | Chongqing China Tobacco Industry Co., Ltd., Chongqing 400060, China | | | FU Peizhou | Chongqing China Tobacco Industry Co., Ltd., Chongqing 400060, China | | | TI Jinsong | College of Tobacco Science, Henan Agricultural University, Zhengzhou 450046, China | tijinsong@henau.edu.cn |
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| 中文摘要: |
| 为明确烟玉（烤烟-玉米）轮作系统碳足迹，本研究基于农户调研数据采用生命周期评价法核算重庆市烟玉轮作系统（研究边界为烟草育苗至烘烤，玉米播种至收获）碳足迹，分析其构成及影响因素，探究种植规模和农户受教育水平与轮作系统碳足迹关系。结果表明：重庆市烟玉轮作系统单位面积碳足迹、单位产量碳足迹、单位产值碳足迹分别为16 255.06 kg·hm-2、1.89 kg·kg-1、0.25 kg·元-1；烟草和玉米生产单位面积碳足迹分别为17 870.71、2 618.13 kg·hm-2，在轮作系统中贡献占比分别为87.2%、12.8%；烘烤烟叶能源消耗、农膜、肥料是重庆市烟玉轮作碳足迹主要贡献源，占比分别为72.6%、13.6%和8.7%；烘烤用煤和烘烤用电与烟玉轮作系统碳足迹呈显著正相关，种植规模和调研农户受教育水平与碳足迹呈负相关。加快取缔煤烤房进程，实行废旧农膜统一回收，施用缓释肥，与甘薯、大豆等需氮量少的作物轮作是重庆市烟玉轮作系统实现减排和发展低碳农业的关键途径，合并地块适当发展规模化种植、增加低碳知识普及、建立监督奖励机制推动低碳措施实行是减少农户碳足迹的重要举措。 |
| 英文摘要: |
| The tobacco-maize rotation system, prevalent in Chongqing, is integral to understanding the carbon sequestration and emission reduction potential in agricultural practices. Employing life cycle assessment（study boundaries：tobacco seedling raising to roasting, maize sowing to harvest）, this study quantifies the carbon footprint of the tobacco-maize rotation system in Chongqing based on survey data from farmers, analyzing its composition and influencing factors. The study investigates the relationship between the carbon footprint and variables such as planting scale and farmers' education level. The findings reveal that the carbon footprint per unit area, per unit yield, and per unit output value of the tobacco-maize rotation system are 16 255.06 kg·hm-2, 1.89 kg·kg-1, and 0.25 kg·yuan-1, respectively. In this system, tobacco production（17 870.71 kg · hm-2）and corn production（2 618.13 kg · hm-2）contribute 87.2% and 12.8% to the carbon footprint, respectively. Major contributors include energy consumption for tobacco curing（72.6%）, agricultural film（13.6%）, and fertilizer （8.7%）. Positive correlations were observed between coal and electricity usage for tobacco curing and the carbon footprint, whereas larger planting scales and higher education levels among farmers showed negative correlations. To achieve emission reduction and advance lowcarbon agriculture in Chongqing's tobacco-maize rotation system, key strategies include phasing out coal grates, implementing unified recycling of waste agricultural film, using slow-release fertilizers, and rotating with crops that have lower nitrogen demands, such as sweet potatoes and soybeans. Further, promoting large-scale planting, enhancing low-carbon knowledge dissemination, and establishing supervisory and incentive mechanisms are crucial for reducing farmers' carbon footprints. |
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