Spatial and temporal evolution of cultivated land use types in Guangdong province and its driving mechanism
[Objective]The study aimed to refine the types of cultivated land use,explore the spatial and temporal evolution patterns of culti-vated land use types and their driving mechanisms,and provide a reference for optimizing the utilization of cultivated land resources and en-suring national food security.[Method]Based on the state of cultivated land use,farmland in Guangdong province was categorized into three types:paddy fields,dry land and cropland abandonment.Employing multiple methods such as the dynamic degree of land use,standard el-lipse deviation model and geographical detectors,the study examined the spatiotemporal changes of long-term cultivated land use types in Guangdong province from three perspectives:time,space and structure.It explored the spatiotemporal evolution patterns and the underlying driving mechanisms,aiming to clarify the changing characteristics of different types of cultivated land use.[Result](ⅰ)Over the past 30 years,the types of cultivated land use in Guangdong province underwent significant changes in their spatiotemporal distribution and internal structure.Paddy fields,dry land and cropland abandonment demonstrated spatial agglomeration characteristics,primarily concentrated in ar-eas with extensive cultivated land distribution but less developed economies,such as the Leizhou Peninsula hilly platform in western Guang-dong,the southwestern Guangdong hills,and the central and southern Guangdong hills.The centroid of cultivated land exhibited a'U-shaped'migration trajectory,moving southwestward overall.(ⅱ)The most significant changes were the conversion of dry land to paddy fields and dry land to cropland abandonment.These changes predominantly clustered in the southwestern Guangdong hills and the Leizhou Peninsula hilly platform,regions with extensive cultivated land distribution but underdeveloped economies.(ⅲ)The area changes in culti-vated land use types in Guangdong province were based on the natural environment and influenced by social,economic,and agricultural de-velopment factors.The primary driving factors for the area changes of the three types of cultivated land use were the amount of chemical fertil-izer applied,the amount of pesticide used,and the labor force in the primary industry.Economic and agricultural factors such as agricultural gross output value,agricultural gross output value per capita,added value of the primary industry,cultivated land area per capita,grain yield,and total power of agricultural machinery have shown an increasing drive for changes in the areas of paddy fields,dry land,and fallow land year by year.[Conclusion]The spatiotemporal distribution,land type conversion,and driving mechanisms of paddy fields,dryland,and cropland abandonment in Guangdong province have formed distinct evolutionary patterns.The optimization and reconstruction of cultivat-ed land resources should be carried out based on the differentiation patterns of cultivated land use types.
Cultivated land useCultivated land typeSpatiotemporal evolutionDriving mechanism
万方数据
维普
