摘要
利用1998-2010年重庆市农田生产投入和农作物产量等数据,采用碳足迹模型方法,对重庆市农田系统的碳排放量、碳吸收量及碳足迹进行了估算.结果表明:(1)1998-2010年重庆市农田系统碳排放量增加了27.65万t,贡献比例最大的主要碳汇类型为农田化肥施用和农业灌溉;(2)13年间重庆市农田系统碳吸收量增加了1143.95万t,其中蔬菜、水稻和高粱吸收量最大.(3)重庆市农田系统2010年的碳足迹为9.07万hm2,总体呈下降趋势,处于碳生态盈余状况,种植结构变化有利于增强农田系统的固碳功能.
Using the data of cropland production investment and crop yield of Chongqing in the period form 1998 to 2010, this paper established a carbon footprint model to estimate the carbon emission amount, the carbon absorption amount and carbon footprint in the cropland ecosystem. The main results are as follows. Form 1998 to 2010, the carbon emission amount of the cropland ecosystem in Chongqing increased by 27.65 × 104 t. The main carbon sources with the greatest contribution proportion were fertilizer applica- tion and agricultural irrigation. In the 13 years, carbon absorption amount of the cropland ecosystem in Chongqing increased by 1143.95~〈 104 t. Of the crops cultivated, vegetables, rice and sorghum had the lar gest carbon absorption. The carbon footprint was 9.07 X 104/ha in 2010 in the cropland ecosystem of Chongqing, showing an ecological surplus. On the whole, the carbon footprint exhibited a decreasing trend. Changes in cropping structure in these years helped to enhance the carbon-fixing function of the cropland ecosystem.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第1期96-102,共7页
Journal of Southwest University(Natural Science Edition)
基金
国家"十二五"科技支撑计划项目(2012BAD141318)
关键词
重庆
碳源
汇
碳足迹
Chongqing
carbon source/sink
carbon footprint
