Abstract:

Statistical data from Yunnan province between 2010 and 2019, including crop production sown area, yield and agricultural input materials during crop growth were selected to estimate the carbon emissions caused by agricultural inputs in the crop production process. The dynamic changes in carbon emissions, the proportion of each input in total carbon emissions, and the influencing factors of carbon emissions from agricultural inputs were analyzed. The results indicated that the carbon emissions and carbon emission intensity of agricultural inputs in crop production in Yunnan province from 2010 to 2019 showed an inverted “U” trend, with 2016 as the turning point, and a significant increase in carbon efficiency observed after 2016. Among the agricultural inputs, fertilizer contributed the most to carbon emissions, accounting for approximately 60.35% of the total emissions. Agricultural film, diesel, pesticides and irrigation accounted for approximately 17.55%, 12.77%, 8.25% and 1.08% of the total carbon emissions, respectively. National policies, crop planting structure, market demand, scientific planting techniques and agricultural production management systems had a significant impact on the changes in carbon emissions from agricultural inputs in crop production. It is recommended to strengthen national policy guidance, improve crop production technology levels, establish a mature agricultural management system, reasonably plan crop planting structures, reduce carbon emissions from agricultural production and promote green agricultural development.

Key words: Agricultural input, Crops production, Carbon emissions, Carbon efficiency