Research On The Effect Of Land Regulation Project On Cultivated Land Fragmentation Management

The scientific development of modern agriculture is an important support for fulfilling the great goals of rural rejuvenation and industrial prosperity.The rational integration of cultivated land resources and the development of large-scale agricultural operations are the "first move" in realizing agricultural modernization,and are also important measures to strictly adhere to the 1.8 billion cultivated land red line.Promoting agricultural modernization,optimizing the allocation of land resources,and improving the efficiency of arable land use are important foundations for the development of agricultural economy.However,the problem of fine-grained cultivated land has a large restrictive effect on the improvement of agricultural production efficiency and the level of agricultural mechanization,making it difficult to effectively use land resources.Effectively solving the problem of fine-grained arable land is of great significance for ensuring the safety of arable land in China and for the mechanization,scale and industrialization of modern agriculture.Land remediation is a feasible and effective way to control the fine-grained farmland.This study selected 20 completed land remediation projects in Yichun City,Jiangxi Province,combining high-resolution remote sensing image maps before and after the implementation of the remediation project,the completion line of the land remediation project area,DEM elevation data in the project area,and socio-economic statistics in the research area.,Select 8 landscape indicators that can represent the number of patches,boundary density,patch density,average patch size,landscape shape index,area-weighted fractal dimension,area-weighted shape index,and fragmentation index that can characterize the fineness of cultivated land,using Google Earth,Arc GIS 10.2,Fragstats 4.2,SPSS 22.0 and other software,evaluate the degree of fineness of the cultivated land before and after completion of the improvement project,and use mathematical statistical methods,such as T-test analysis and regression analysis,to explore land improvement projects The impact of the implementation of farmland on the fine-grained control of cultivated land and its related factors.On this basis,countermeasures and suggestions are proposed to solve the problem of fine-grained farmland.research shows:(1)After the completion of the land improvement project,the overall patch number,patch density,and boundary density in the project area showed a downward trend.The average number of patches decreased by 18.3%,the average patch density decreased by17.8%,and the average boundary density decreased by 11.9%.The average patch area increased by an average of 0.31 mu.The change of the above indicators indicates that the land improvement project has an improvement effect on the fineness of the cultivated land in the project area.The change of the shape indicators also shows a certain regularity: the weighted score of the area of the project area that completed a lot of land leveling projects The dimensionality and area-weighted shape index show a downward trend,indicating that the geometry of the cultivated land in the project area tends to be simple and regular,but in areas with complex terrain and large slopes,the implementation of land remediation projects has no obvious effect on the shape of the plots.(2)The effect of land remediation projects on the fine-grained treatment of cultivated land is affected by the combination of natural conditions and human factors,and there are differences in the treatment effects in different project areas.One is the topographical conditions of the project area.In areas where the terrain is undulating,the leveling of the land is difficult,the number and area of the leveling units are small,and the implementation of the project is not effective in reducing the fineness of cultivated land;Obvious results.The second is the amount of capital investment in land improvement projects,especially the proportion of investment in land leveling projects.Under the condition of certain natural conditions,the more abundant the funds for land leveling projects,the lower the degree of fineness of the cultivated land after reorganization;if the funds for reorganization are insufficient,it may result in poor governance of the fineness of the cultivated land after reorganization.(3)The implementation of land improvement work has improved the irrigation and drainage conditions of rural roads and arable land to a certain extent.However,the construction of rural roads and ditches will cut the relatively complete patches in space,which will lead to the fineness of the cultivated land in the project area Aggravating the most important human factor.Therefore,it is necessary to pay attention to the landscape pattern design of rural roads and ditches in land remediation planning and design,increase the leveling of land,and achieve the goals of effectively controlling the fineness of cultivated land and improving the ecological benefits of land remediation landscape.