水稻生产系统固碳能力与碳足迹研究——以湖南省为例

Evaluation of the Carbon Sequestration Capacity and Carbon Footprints in the Rice Production Systems——A Case of Hunan Province

运用生态经济学原理,对湖南省典型水稻生产系统的固碳能力与碳足迹进行系统分析和比较。结果表明:早稻、中稻和晚稻生产系统固碳能力分别为3 901.7、5 375.2、4 852.3 kg C/hm2,3个水稻生产系统每生产1 kg的经济产量相当于固定0.61、0.67、0.65 kg C。早稻、中稻和晚稻生产系统的生产资料碳足迹分别为0.172、0.133、0.139 kg CO2equi./kg。早稻、中稻和晚稻生产系统的生产资料碳足迹以化肥最大,其次是电力和柴油的碳足迹。

The carbon sequestration and carbon footprint in the typical rice production system in Hunan province were ana- lyzed and compared by the principle of ecological economics. The results showed that carbon sequestration capacity of early rice, middle - season rice and late rice production system were 3 901.7,5 375.2,4 852. 3 kg C/hm2 , respectively. 1 kg e- conomic yield in three rice production systems were equivalent to fix O. 65,0.67,0.61 kg C ,respectively. Carbon footprints of production materials in the early rice, middle -season rice and late rice production system were 0. 172,0. 133, 0. 139 kgCO2 equi./kg, the biggest carbon footprint among production materials in the early rice, middle -season rice and late rice production system was chemical fertilizer,followed by the electric power and diesel.