中国农作物生产碳足迹及其空间分布特征

发布时间：2018-05-08 15:06

本文选题：农作物 + 碳排放　；参考：《应用生态学报》2017年08期

【摘要】：基于中国1993—2013年的农业统计数据,采用生命周期评价、重心模型以及GIS等方法分析农作物生产碳排放及碳足迹的时序变化、碳足迹重心的移动轨迹、碳排放和碳足迹的空间分布特征以及影响碳排放的主导因素.结果表明:研究期间,中国农作物生产碳排放量(GHGe)、单位播种面积碳足迹(CFs)和单位耕地面积碳足迹(CFc)均显著增加,而单位产量碳足迹(CFy)和单位产值碳足迹(CFv)显著减少.CFs重心一直分布在河南,且逐渐移向西南;CFc重心位于湖北或河南,并向西北方向移动;CFy重心位于陕西或河南,且整体移向东南;CFv重心始终在河南,并逐渐移向西南.GHGe和碳足迹存在显著的省域差异,GHGe具有南北低、中部高的特点,CFs是东西两翼高、中间低,CFc高值区主要集中在中部及东部沿海省份,CFy在西北-东南方向上表现为"高-低-高",CFv在西北-东南方向上则是由高走低.农业生产过程中不同投入占农作物碳足迹的比例以化肥最为突出,化肥投入构成中以氮肥和复合肥所占比例较大.通过分析GHGe与各影响因素的关联度,得出化肥尤其是磷肥和氮肥、灌溉以及农田N_2O排放是导致GHGe显著增加的主导因素,并据此提出发展低碳农业的对策建议.
[Abstract]:Based on the agricultural statistics data from 1993 to 2013 in China, this paper analyzes the time series changes of carbon emissions and carbon footprint of crop production by using life cycle evaluation, barycenter model and GIS, and the moving track of carbon footprint center of gravity. The spatial distribution characteristics of carbon emissions and carbon footprint and the dominant factors affecting carbon emissions. The results showed that during the study period, the carbon emissions from crop production in China (GHGeN), carbon footprint per seeding area (CFS) and carbon footprint per cultivated land (CFC) increased significantly. However, the carbon footprint per unit production (CFY) and the carbon footprint per unit output value (CFV) decreased significantly. The center of gravity of CFS has been distributed in Henan, and gradually moved to the southwest of China. The center of gravity of CFC is located in Hubei or Henan, and the center of gravity of CFy moves northwestward in Shaanxi or Henan. And the center of gravity of CFV is always in Henan, and gradually moved southwest. GHGe and carbon footprint have significant difference. GHGe has the characteristics of low in north and south, high in middle. CFS is high on both sides of east and west. The middle low CFC high value region mainly concentrated in the central and eastern coastal provinces in the northwest-southeast direction of the performance of "high-low-high" CFV in the northwest-southeast direction is from high to low. In the process of agricultural production, the proportion of different inputs to crop carbon footprint was most prominent in chemical fertilizer, and the proportion of nitrogen fertilizer and compound fertilizer in the composition of chemical fertilizer input was larger. By analyzing the correlation degree between GHGe and various influencing factors, it is concluded that fertilizer, especially phosphorus and nitrogen fertilizer, irrigation and farmland N2O emission are the main factors leading to the significant increase of GHGe, and the countermeasures and suggestions for the development of low-carbon agriculture are put forward.
【作者单位】：咸阳师范学院资源环境与历史文化学院;咸阳师范学院经济与管理学院;河北北方学院生态建设与产业发展研究中心;河北北方学院法政学院;
【基金】：陕西省社会科学基金项目(2016D034) 陕西省教育厅科研项目(16JK1828) 陕西省普通高校优势学科项目(历史地理学:0602) 咸阳师范学院“青年骨干教师”计划项目(XSYGG201609) 河北省高等学校人文社会科学重点研究基地项目(20143101)资助~~
【分类号】：S181

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