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| 基于京津翼一体化的农田生态系统碳足迹年际变化规律研究 |
| Inter-annual Variations of the Carbon Footprint in Beijing Tianjin and Hebei Agro-ecosystem |
| 投稿时间：2017-09-05 修订日期：2017-10-09 |
| DOI：10.13254/j.jare.2017.0222 |
| 中文关键词: 京津冀，农田生态系统，碳足迹，碳源，碳汇 |
| 英文关键词: Beijing Tianjin and Hebei, agro-ecosystem, carbon footprint, carbon source, carbon sinks |
| 基金项目:“粮经作物产业技术体系北京市创新团队”建设专项（BAIC09-2018）；科技创新服务能力建设-城乡生态环境北京实验室建设专项（PXM2017_014207_000037）；科技创新服务能力建设-科研基地建设-林果业生态环境功能提升协同创新中心（2011协同创新中心）（市级）项目（PXM2017_014207_000024） |
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| 摘要点击次数: 1955 |
| 全文下载次数: 2000 |
| 中文摘要: |
| 基于京津冀一体化背景下，以农田生态系统作为研究对象，对2005—2014年农田生态系统的碳汇、碳源、碳足迹的年际变化进行了研究，为京津冀一体化的规划和产业布局提供理论依据。结果表明：京津冀地区农田生态系统的碳汇功能呈下降趋势，近10年降幅为6.6%，年均固碳量为485.5万t·a-1，碳汇功能的主要决定因素是粮食作物中玉米与小麦的经济产量及种植面积。京津冀地区农田生态系统碳排放量年均727.8万t·a-1，基本上呈现出逐年降低的趋势，碳排放量的主要决定因素为农业化学品中氮素化肥的施用量。京津冀地区农田生态系统碳足迹年均为161.2万hm2·a-1，呈现出逐年减少趋势，处于碳生态盈余状态。 |
| 英文摘要: |
| Based on the integration of Beijing, Tianjin and Hebei, we investigated inter-annual changes in carbon footprint from 2005 to 2014 in the agro-ecosystem of suburban Beijing Tianjin and Hebei. Our findings indicated that:(1) Carbon sink decreased 6.6 percent annually. The average annual carbon storage amount was 4 855 000 tons, with food crops constituting the highest proportion;(2) Carbon emission in the system showed a gradually decreasing trend, with agricultural chemicals as significant contributors. The annual average carbon emission was 7 278 000 tons in the Beijing Tianjin and Hebei farmland ecosystem. The largest amount of carbon emissions came from agricultural chemicals, nitrogen(from fertilizer)was the biggest contributor;(3) The average carbon footprint was 1 612 000 hm2 in the Beijing Tianjin and Hebei farmland ecosystem and showed a decreasing trend along with an ecological surplus of carbon. |
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