基于生命周期评价的水稻种植过程碳中和分析OA北大核心CSTPCD

To investigate the changing trend of carbon budget during rice cultivation in Liaoning Province,the study collected data from 2012 to 2021 and used the life cycle assessment(life cycle assessment,LCA)method.The results indicated that methane(CH4)emissions from rice cultivation comprise the largest portion of the carbon emissions.The maximum value of CH4 emissions was recorded in 2012 at 5.69 Mt CO2-eq,contributing 53.26%of the total carbon emissions.The annual carbon emission change curve per unit area takes the shape of a downward-opening parabola during rice cultivation in Liaoning Province.While carbon emission per unit of production,carbon loss per unit area,and carbon loss per unit of production experience wave-like variations,on the whole year,it shows a decreasing trend with time.The process of advancing the carbon neutrality level of rice cultivation in Liaoning Province demonstrates a gradual decrease in carbon loss from 2012 to 2021,with a positive trend towards achieving environmentally friendly and low-carbon rice cultivation.To further aid the agricultural"peak carbon dioxide emissions and carbon neutrality"target process,it should implement low-carbon cultivation technology to effectively sequester carbon,conserve energy and promote advanced,environmentally conscious and high-yielding cultivation methods.