Research On Renewal And Monitoring Of Cultivated Land Quality Classification Based On ArcGIS For Gongcheng,Guangxi

The protection of cultivated land is closely related to the development of the country and the region.To update and monitor the quality of cultivated land is a powerful guarantee for the implementation of cultivated land protection system.In order to learn more about the current status of cultivated land use and the changes in cultivated land quality in Gongcheng Yao Autonomous County this year,the update and monitoring research on cultivated land quality was carried out in Gongcheng Yao Autonomous County to understand the dynamic changes and influencing factors of cultivated land quality in the county.Based on the analysis of the current situation of cultivated land quality in Gongcheng Yao Autonomous County,this paper collected relevant data with the help of ArcGIS10.1software,analyzes the reasons for the dynamic changes of cultivated land quantity and quality in a year,and uses incremental package extraction method with calculation formula to obtain the annual update results of cultivated land quality,and based on the monitoring results of the previous year,through field investigation and data analysis.According to the treatment method,the fixed monitoring unit and random monitoring unit were continuously monitored,and the cultivated land quality grade monitoring results in 2018 were obtained.The main conclusions are as follows1)In 2018,the cultivated land quality of Gongcheng Yao Autonomous County was updated in a sequence distribution range of 6-12 at the national level of natural quality and 6-11 at the national level of utilization,and national economic grade,5-11 grade.2)Through data comparison,it can be found that the national natural quality level has increased by 0.0088,the national utilization level has increased by 0.007,and the national economic level is basically the same as the national utilization level,which is the same as0.007.Overall,the cultivated land quality of Gongcheng Yao Autonomous County in 2018 has been slightly improved.3)The division of gradual change type of Gongcheng Yao Autonomous County comprehensively considered the basic situation of topography,geomorphology,soil,spatial distribution of water source,cultivated land use change and so on.Finally,Gongcheng Yao Autonomous County was divided into four gradual change types: fertility improvement type,fertility decline type,acidification type and gradual drought type.4)Compared with the monitoring results of the previous year,the grade of the monitoring unit at the end of the year increased by 0.33 grade compared with the grade at the beginning of the year in the fertility improvement type;the grade of the monitoring unit decreased by 0.11 grade in the fertility decline type;the grade of the monitoring unit decreased by 0.37 grade in the acidification type;the grade of the monitoring unit at the end of the year did not change compared with the grade at the beginning of the year in the gradual drought type.Through the study on the renewal and monitoring of cultivated land quality in gongcheng yao autonomous county,it is expected to provide a theoretical basis for the quantity,quality and ecological construction of cultivated land in the county,and can also be applied to the implementation and management of territorial space planning,land consolidation and other aspects.At the same time,the results of updating and monitoring the quality of cultivated land can provide basic data support for determining the quality of cultivated land in the permanent basic farmland demarcation,and also provide a reference for the research on updating and monitoring the quality of cultivated land in other areas.