Spatial Difference Characteristics And Application Of Cultivated Land Quality In Ruichang City Based On GIS

"People take food as their heaven and food as their first priority." Food security is directly related to human survival and the development of the country.The soil quality of cultivated land is a prerequisite for ensuring food security.Therefore,improving the quality of cultivated land is the original intention of land management departments at all levels.On the one hand,the increasing contradiction between the supply of land resources and the limited land required for rapid economic and social development has become a reality that human beings must face.On the other hand,this phenomenon of uncoordinated human and land not only limits the development of agriculture.At the same time,it also accelerates the evolution of the contradiction between man and land because it has an impact on the future development of human society itself.This paper takes the data of the2018 update of the cultivated land quality database in Ruichang as the data support,introduces the concept of the national cultivated land quality index,and uses the natural index,the utilization index,and the economic index as the entry points,by mining the space in GIS technology.The autocorrelation analysis method is applied to the spatial difference characteristics of cultivated land quality in Ruichang City.Based on this,the spatial dimensions of cultivated land quality and natural indexes,cultivated land quality and other indexes,and cultivated land quality and economic indexes are discussed at different spatial scales at the county and township levels.Based on the research results of the spatial differences of cultivated land quality in Ruichang City,the division of cultivated land protection zones is proposed,and targeted cultivated land protection measures are proposed for each cultivated land protection zone,which will further improve the management and improvement of differentiated cultivated land protection.Provide a scientific basis for improving the quality of cultivated land and reasonably advancing land development.Research indicates:(1)On the whole,on the one hand,the quality of cultivated land in Ruichang City is at a medium level in three levels,such as the natural index,the utilization index,and the economic index.On the other hand,the cultivated land quality of different land types in Ruichang showed different spatial correlations in terms of regional spatial distribution.(2)The spatial differences and spatial correlations of regional cultivated land quality are more sensitive to changes in spatial scale.The differences in cultivated land quality at the county level and the township level show strong spatial autocorrelation.The Moran’s I index values of the three categories of natural,use,and economic indexes of the two are separately classified By comparison,it is found that there is a clear difference between the two,and the spatial autocorrelation of cultivated land quality and the spatial scale show a positive correlation.(3)Based on the results of local spatial autocorrelation analysis of cultivated land quality in Ruichang City,and combined with the types of clustering patterns and local reality,the city is divided into cultivated land reserve areas,permanent protection areas,moderate protection areas,key protection areas,and comprehensive improvement areas The five cultivated land protection sub-regions respectively proposed the implementation of the balance of cultivated land occupation,increase the effective cultivated land area,delineate permanent basic farmland,protect high-quality cultivated land,strictly control non-agricultural construction,guarantee high-value areas of comprehensive benefits,and enhance comprehensive benefits.Low-value areas,to avoid continuous development,promote land development and improvement,and improve the current status of cultivated land use.Five types of differentiated cultivated land protection measures,which will provide a certain scientific basis for the protection and management of differentiated arable land,improve and improve the quality of arable land,and rationally promote land development and improvement.