Zoning of cultivated land use in Liaoning Province based on "quality-output-efficiency"

Abstract: Cultivated land use zoning is an important part of China's land use management, and it is an important basis for guiding the future development of cultivated land in the region. It is the key to enhance the feasibility of the management of cultivated land use. Most studies have focused on the selection of zoning elements and indicators for cultivated land use, often overlooking the spatial connectivity between the cultivated land use partition units and the integrity of administrative divisions, directly affecting the zoning management effect of cultivated land use. How to adopt the scientific zoning method, and take into account the differences, similarities and spatial connectivity between partitioned units is an urgent problem to be solved. In order to guide the orderly development of regional space according to local conditions, alleviate the pressure of cultivated land protection and enhance the value of cultivated land, in this paper, Liaoning Province was taken as research area, and two-dimensional graph theory clustering and GIS spatial analysis were adopted. Based on the zoning indicators of cultivated land use quality, output and efficiency, the comprehensive zoning of cultivated land use was carried out, and the utilization direction of cultivated land in each district was explored. The results showed that: 1) There were some spatial differences in the natural quality, output level and use efficiency of cultivated land among the counties (cities) in the study area. The high-value areas were mainly distributed in the central and northern areas of Liaoning. The low-value areas were mainly distributed in the east and south of Liaoning Province, while the western areas were uneven. 2) The research area was divided into five cultivated land use areas: Grain production and ecological protection area in western Liaoning, pilot area of comprehensive development of cultivated land in central Liaoning, paddy field and characteristic agricultural planting area in eastern Liaoning, potential tapping area of cultivated land efficiency and productivity in southern Liaoning and transformation and upgrading area of cultivated land utilization in central and Southern Liaoning. 3) The zoning method combining two-dimensional graph theory clustering and GIS spatial analysis effectively guaranteed the connectivity of the adjacent unit space of the cultivated land and the integrity of the administrative boundary, which has good applicability to the cultivated land use zoning; it was conducive to the unified management and implementation of the use of cultivated land. This paper selected the cultivated land use quality, output level and utilization efficiency as key indicators to reflect the status of cultivated land use, and to divide cultivated land into different utilization areas, and combined with the main functional area planning to determine the future direction of cultivated land use, it has certain practical reference value for comprehensive guidance of regional cultivated land use and development. The cultivated land use zoning results neglect the difference between the internal units of individual zoning to some extent, but this difference has to be neglected in order to achieve spatial connectivity. To better realize the cultivated land use, it is necessary to formulate differentiated cultivated land use guidance policies and guarantee mechanisms according to the actual conditions of each area to ensure the effective implementation of cultivated land use management.