关键词: 碳足迹, 碳吸收, 碳排放, 影响因素

Abstract:

To calculate the carbon footprint of rice production could help promote coordinated efforts to increase agricultural yield and efficiency, as well as green and low−carbon development. Based on the data of yield, sowing area and agriculture production input of rice in Panjin region (Shuangtaizi district, Xinglongtai district, Dawa district and Panshan county) from 2014 to 2022, carbon footprint of rice agricultural land use and influencing factors were estimated. These results could provide a reference base for achieving energy conservation and emission reduction in rice production and green low−carbon development. The results showed that the carbon sequestration per unit sown area of rice in Panshan from 2014 to 2022 showed a decreasing trend and then an increasing trend (P＜0.01), with a large fluctuation from year to year. There was little change in carbon sequestration per unit sown area in Shuangtaizi district, Xinglongtai district, and Dawa district, and the differences were no significant at different regions. During the study, there were no significant in carbon emissions per unit sown area of rice, carbon footprint between Shuangtaizi district, Xinglongtai district, Dawa district and Panshan county from 2014 to 2022, but the differences were significant (P＜0.01) at different regions. The average carbon footprint of rice agricultural land use showed that Dawa district (0.50×10⁴ha) and Panshan county (0.53×10⁴ha) were significantly higher than Shuangtaizi district (0.03×10⁴ha) and Xinglongtai district (0.04×10⁴ha). In the carbon footprint structure of rice agricultural land use, nitrogen fertilizers, agricultural machinery and pesticides accounted for 23.20%, 12.05% and 20.82% of the average carbon footprint. With the promotion of low−carbon rice production, various approaches such as reducing nitrogen fertilizer and pesticide fertilizer input and increasing utilization efficiency, mechanized operation efficiency, and policy leverage have combined to reduce carbon emissions from the rice production in Panjin. 

Key words: Carbon footprint, Carbon sequestration, Carbon emission, Influence factor