Study On Temporal And Spatial Evolution And Optimization Of Cultivated Land Resources In Bohai Rim Region

Cultivated land is closely related to human survival and development.Cultivated land resources are related to national food security,sustainable agricultural development and cultural heritage,and are of great significance to the long-term stability of the country and society.On the one hand,with the development of industrialization and urbanization and the deepening of ecological conversion projects,my country’s construction land and ecological land squeeze the living space of cultivated land.On the other hand,demand for agricultural products still depends on arable land.In addition,my country’s arable land has many problems such as low per capita arable land,insufficient reserve resources,and reduced quality.By selecting the Bohai Rim region as the research area,using Globe Land30 surface cover data as the source,combined with GIS spatial analysis methods.The temporal evolution of cultivated land resources was analyzed by using dynamic attitude of cultivated land use,relative change rate of cultivated land and transfer matrix,and the spatial evolution of cultivated land resources was analyzed by using Theil index,Moran index and kernel density value.and the use of hybrid regression model and spatial measurement model to analyze the influencing factors of the change of cultivated land resources in the Bohai Rim area.The main research content and conclusions are as follows: Firstly,using the 2000-2020 period 2 and 3 land use data to analyze the resources in the Bohai Rim region,and study the temporal and spatial evolution of cultivated land resources from the aspects of quantity,structure,and spatial transformation.In terms of time scale,the area of cultivated land in the Bohai Rim region has shown a steadily decreasing trend in the past 20 years.The amount of cultivated land resources in the urbanization center and ecological function zone has decreased the most,with a decrease of 37,800 square kilometers;from the spatial scale,the Bohai Rim region The proportion of cultivated land resources shows a significant positive spatial correlation.Secondly,the data of the Bohai Rim region from 2000 to 2020 is divided into two data methods,namely,the flow rate and the inventory of the third period.The data of the period 3 is used to analyze the influencing factors of cultivated land resources in the Bohai Rim region using a spatial measurement model.The administrative area and the level of agricultural mechanization are the positive driving factors that affect the amount of cultivated land resources in the Bohai Rim,while the total population,the number of employees in the secondary and tertiary industries,and the total area of ecological land are the negative influencing factors that affect the amount of cultivated land resources in the Bohai Rim.Finally,based on main function zoning in China,combined with the influence of cultivated land resource in the circum bohai sea region of space-time evolution impact factors,put forward the main body function regionalization of cultivated land use classification control,the coordinated development of population and cultivated land use,optimize the industrial structure to realize efficient use of cultivated land,intensive management,rational planning of ecological land and arable land area to promote the five aspects of cultivated land protection development countermeasure.