Analysis Of Spatial And Temporal Variation Characteristics Of Cultivated Land In Suburban Shanghai And Its Influencing Factors

At present,the society and economy of our country is in transformation and development period.With the deepening of the urbanization and industrialization process,the utilization and protection of arable land resources is facing new challenges,the urban agriculture development of Shanghai has the versatility,which puts forward new requirements for land use in Shanghai suburbs.It is of great significance for the promotion of sustainable development of urban agriculture,optimization of land use structure and service in Shanghai,an international metropolis,to study the characteristics of quantity changes of farmland of Shanghai suburbs and explore the driving factors of cultivated land change of time and space.The dissertation,taking cultivated land in Shanghai suburbs as the research object,select,built relevant index system,the integrated use of qualitative quantitative method,with the aid of ArcGIS and SPSS tool,systematically analyzed the spatial and temporal variations of cultivated land in Shanghai suburbs and its influencing factors,and for the future of Shanghai suburb of cultivated land utilization and protection countermeasures and Suggestions are put forward.The main research results are as follows:(1)From 1978 to 2015,the total cultivated land in Shanghai experienced 3 phases of a slow decline,a rapid fluctuation,and a steady decline;Influenced by policy direction,the total amount of cultivated land in the suburbs of Shanghai has decreased significantly in recent years;(2)In the past 10 years,the spatial distribution of cultivated land in suburban Shanghai has presented the evolution process of "reverse Thunen's circles";(3)Overall,the cultivated land density of outer suburban area is greater than that of the suburban area;amount distribution of cultivated land and density distribution are not completely consistent,the density level of the area where there are more plow land is not always high;(4)During the study period,the utilization depth of cultivated land in the suburb of Shanghai was strengthened in suburbs and the outer suburb slightly weakened in outer suburbs;(5)The added value of the tertiary industry in Shanghai suburbs is closely related to the change of cultivated land,and the leading influence factors of the change of cultivated land in the suburbs are different.Finally,the article,based on the above analysis results and aiming at future rational utilization and protection of the cultivated land in Shanghai suburbs,put forward countermeasures and suggestions on the industrial structure improvement,awards and intensive utilization of cultivated land protection.