Research On The Temporal-spatial Coupling Relationship Between Cultivated Land Use Form And Economic Development Level In Nanchang

In order to promote the transformation and development of rural areas and improve the social and economic level,the transformation of cultivated land use is of great significance.Nowadays,with the rapid development of economy,the research on cultivated land transition has received high attention,emphasizing that the relationship between cultivated land use and economic development must be correctly handled.Seeking a path to coordinate regional cultivated land utilization and economic development is the key to high-quality and healthy economic development,and it is also an important guarantee for the protection of cultivated land resources.As a national science and technology innovation demonstration zone and an important industrial base and manufacturing city in the central region,Nanchang is facing important opportunities for economic development.It is very necessary to explore the coupling and coordination relationship between cultivated land utilization and economic development in Nanchang,and to promote the coordinated and sustainable development of cultivated land utilization and economic development.This paper selects 9 districts and counties under the jurisdiction of Nanchang City as the research object,qualitatively and quantitatively studies the characteristics of cultivated land use change and economic development level and the relationship between the districts and counties of Nanchang City.Autocorrelation model to analyze the spatial and temporal characteristics of cultivated land use change and landscape pattern from 2012 to 2020.Then use Gini coefficient,Theil coefficient and coefficient of variation to measure the difference of Nanchang’s economic development level.From the five aspects of economic scale,resident life,urbanization,economic structure and POI index,establish an economic development level evaluation index system consisting of 12 indicators,and use the entropy value method to calculate the weight of each index to obtain the comprehensive score of economic development level,using this score as the evaluation basis,comprehensively analyze the change characteristics of the economic development level of each district and county in Nanchang City from the perspective of time and space.Finally,establish a coupling coordination model and a relative development model,calculate the coupling degree,coordination degree and relative development degree of the cultivated land use form and economic development level in the study area,and analyze the evolution of time and space,and finally put forward the relationship between cultivated land use and economic development in the study area.Coordinate optimization recommendations.The following research results were obtained:(1)The use of cultivated land in Nanchang changed significantly during the study period,the most prominent of which was the conversion of cultivated land to construction land,which mainly spread out from the center of Nanchang city center.The early and late stages of the study showed"ring" and " The spatial pattern characteristics of "bits and spots".From 2012 to 2020,a total of 145 types of cultivated land use change types maps were generated,with a total area of 5146.76 km2,among which the stable types in the whole period were the main ones,followed by the late change types.The landscape pattern of cultivated land is fragmented,and the patches appear to be dispersed first and then aggregated,and the degree of aggregation has decreased.The transformation of cultivated land use has a positive correlation effect,and the transformation of cultivated land function has a significant agglomeration in the spatial distribution.(2)From 2012 to 2020,the economic development levels of all districts and counties in Nanchang City showed an increasing trend,but there were many districts and counties with low economic levels,and there was a big gap compared with areas with high economic development levels.Unbalanced economic development is very prominent.The development level of Nanchang’s central urban area is high,and the development of districts and counties far away from the central urban area generally lags behind,presenting a "central-marginal" spatial pattern.The center of gravity of the level of economic development moves relatively small,showing a broken-line trajectory moving in the southeast direction as a whole,and its spatial pattern shows a trend of upward expansion from northwest to southeast,and a trend of shrinking from northeast to southwest.(3)During 2012-2020,the coupling coordination degree between the cultivated land use form and the level of economic development in Nanchang showed an overall trend of increasing year by year.The central area of the city’s coupling coordination degree is lower than the surrounding areas,showing a spatial distribution pattern of "strong core,weak center,and weak edge".The coordinated development of cultivated land use form and economic development level in the region is unbalanced,and the relative development types are mainly lagging behind in economic development and lagging in cultivated land use form,and the development gap shows a trend of shrinking year by year.According to relevant analysis conclusions,policy suggestions are put forward for promoting Nanchang’s economic development,promoting the optimization of cultivated land resource structure,and narrowing regional differences.The innovation points of this paper are as follows:(1)Most of the construction of the academic evaluation index system on the level of economic development is based on statistical yearbook data,and does not involve geospatial data(POI data)related indicators.However,POI data can reflect various activities of the city to a certain extent,with a large amount of data and rich information.Combining it with other economic development evaluation indicators can more accurately measure the level of economic development.Therefore,this paper incorporates POI data into the construction of the evaluation index system of economic development level,and selects 12 indicators from five dimensions of economic scale,resident life,urbanization,economic structure,and POI index to construct a comprehensive evaluation index system of economic development level.The comprehensive evaluation of regional economic development level expands the research method of economic development level evaluation.(2)Based on the changes in cultivated land use in Nanchang,the differences in the economic development levels of districts and counties,the coupling relationship between the two and the relative development status,this paper puts forward optimization suggestions for the coordinated development of Nanchang in the future,and provides some guidance for sustainable and high-quality development.reference.