Pathways of cropland use in mountainous areas balancing carbon emission reduction and food security
In order to explore the development pathways of achieving carbon emission reduction and carbon sink enhancement and safeguarding food security in the process of utilizing cropland in mountainous areas,this study established a methodological system for the comprehensive assessment of carbon emissions from cropland in mountainous areas and carbon uptake by crops,taking Guizhou Province,where the typical karst landscapes are distributed,as the study area.This study used carbon emission coefficients to measure carbon emissions from cropland in Guizhou Province and its cities and prefectures,and parameter estimation method to measure crop carbon sequestration.It also analyzed the influencing factors of carbon emissions from cropland use in Guizhou Province in different periods between 2010 and 2021 based on the logarithmic mean Divisa index(LMDI)factor decomposition model.The study revealed the pathways to reduce emissions and increase sinks in the process of cropland utilization and ensure food security with the unique resource endowments of mountainous cropland,and explored the sustainable development of cropland use in mountainous areas in the new period.The results of the study show that:1)Carbon emissions from cropland in Guizhou Province have been on the rise for the past 12 years,and the amount of fertilizer use was the main regulating factor of carbon emissions,which is the key to carbon emission reduction from cropland in the area.2)The carbon sequestration capacity of crops in Guizhou Province has a large potential.Although there are differences in the crop planting structure of each city and prefecture,rice and corn are still the main food crops in the province and most of the cities and prefectures,and play an important role in cropland as a carbon sink.3)The planting structure of crops has a significant inhibitory effect on carbon emissions from cropland,while the level of development of the agricultural economy is positively correlated with carbon emissions from the cropland.It is necessary to reduce the inefficient input of chemical fertilizers,and accelerate and deepen the structural adjustment of the agricultural industry on the basis of the construction of high-standard farmland,which is of great significance for the green and low-carbon development of agriculture in Guizhou Province,and for facilitating the realization of the"dual-carbon"goals nationwide.
cropland in mountainous areascarbon emissionscarbon sequestrationLMDIfood security
万方数据
维普
