Arable land consolidation zoning based on comprehensive evaluation of capacity and health

Abstract: Rehabilitation of arable land is an important measure to increase the quantity of arable land and improve the quality of arable land. It is an important way for the country to realize the "food crop production strategy based on farmland management and technological application". At present, the improvement of arable land mainly focuses on the improvement of arable land quality and productivity, but insufficient attention to the health of arable land. In this paper, we used the stepwise correction method to evaluate the arable land productivity, analyzed the limiting factors affecting the arable land productivity, used K-means clustering method to cluster the limiting factors in Daxing District; and used the Nemero index method and the minimum limiting factor method for arable land health diagnosis, analysis of the health of arable land; comprehensive analysis of limiting factors and health diagnosis results, and division of land remediation areas. The results showed that there were 15 types of restriction factors in Daxing District, mainly in the four types of "soil profile pattern", "arable land fragmentation", "soil organic matter" and "soil profile pattern-arable land fragmentation", The limitation of soil profile pattern ，arable land fragmentation and soil organic matter was relatively common; the area of arable land with mild sub-health, moderate sub-health and severe sub-health in Daxing District was 17 924.31, 6 629.28 and 16 260.97 hm2, respectively. From a spatial perspective, the light sub-health cultivated land was mainly distributed in the eastern part of Daxing District, moderately healthy arable land was mainly distributed in the western part of Daxing District, while severe sub-health arable land was mainly distributed in the southern part of Daxing District. The area of cultivated land in the capacity-rehabilitation key remediation area was 13 582.40 hm2, accounting for 33.28% of the total area of cultivated land, mainly in the eastern and northeastern townships such as Qingyundian Town, Changziying Town, Bohai Area, Huangcun District, and Caiyu Town, as well as some areas of Qizhen and Lixian Towns. The area of capacity improvement general rectification area was 10 971.20 hm2, accounting for 26.88% of the total area of arable land, and was concentrated in areas such as Pang Gezhuang Town, Yuzhen Town, South of Caiyu Town and Beijiao Village Town. The ecological conservation type fallow treatment area was 16 260.98 hm2, the largest, accounting for 39.84% of the total area of arable land, and was settled in the towns including some areas of Lixian Town, Wei shanzhuang Town and Yufa Town and more in Panggezhuang town. According to different types of remediation, different measures for consolidation of arable land were proposed. The research on arable land consolidation based on limiting factors and health diagnosis provided some reference for the current comprehensive improvement of land space and overall protection, systematic restoration and comprehensive management of arable land resources.