摘要
本研究收集整理近10年来我国地市年鉴化肥施用数据,基于生命周期分析思想定量研究我国2008~2017年地市尺度的化肥施用碳足迹时空演变特征.结果表明:2008~2017年,我国化肥施用碳足迹以2013年为节点呈现“先增大后减少”的单峰变化,2015年我国氮、磷和钾肥施用总碳足迹负荷为1.97t CO_(2)eq/hm^(2),较发达国家平均水平高出50%以上;在化肥生产和施用的全生命周期阶段,生产和运输过程的温室气体排放占比较高(60%以上);氮肥的施用贡献了约91%的总化肥施用碳足迹;超过3/4的地市化肥施用碳足迹负荷过高,主要位于我国三大粮食主产区(华北平原,东北平原和长江中下游平原);2013年以后仍有33个地市的化肥施用碳足迹依然保持增长,这些地区主要位于新疆,云南和黑龙江等地.本研究揭示了近10年我国化肥施用碳足迹的变化过程,可为我国绿色农业发展和温室气体相关政策制定提供一定参考依据.
The carbon footprint(CF)of fertilizer application on the scale of prefecture-level regions in China were estimated,based on life cycle assessment(LCA)and agricultural statistical data,and the magnitude,components and spatial-temporal patterns of CF associated with fertilizer application were discussed.Results indicated that the CF showed a single peak in 2013 during 2008~2017,i.e.,increase first and then decrease.The farm CF(FCF)was 1.97t CO_(2)eq/hm^(2) in 2015,more than 50%of the level in developed countries.The use of nitrogen fertilizer contributed about 91%of the total CF,reflecting its key role for GHG emission control and mitigation.All regions with high CF and FCF were located in three major grain production areas in China,i.e.,North China,Northeast China,and the Yangtze Plains.Improving their production efficiencies as well as developing intensified agriculture can contribute to GHG emission control.Areas with growing CF after 2013 were mainly located in Xinjiang,Yunnan,and Heilongjiang Provinces.Outputs of this study are expected to better understand the agricultural CF of China and subsequently assist in policy making related to GHG emission control.
作者
田沛佩
卢宏玮
李丹
殷闯
夏军
TIAN Pei-pei;LU Hong-wei;LI Dan;YIN Chuang;XIA Jun(Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;School of Renewable Energy,North China Electric Power University,Beijing 102206,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2021年第2期967-973,共7页
China Environmental Science
基金
国家重点研发计划(2019YFC0507800)
国家自然科学基金资助项目(41890824)。
关键词
化肥施用量
碳足迹
时空演变
农业
温室气体
fertilizer
carbon footprint
spatial-temporal pattern
agriculture
GHG
