Comprehensive Evaluation And Protection Of Cultivated Land In Xiang Zhou District

Cultivated land,as a special natural resource,is of great significance for maintaining national security and ensuring people’s life.With the development of social economy and the increasing population,the resources of cultivated land in our country are increasingly short and destroyed,and the problem of cultivated land has become a constraint factor of social and economic development.It has important reference value for improving the quality of cultivated land and the distribution of agricultural development.Based on the analysis of GIS technology,this paper selects Xiangzhou District of Hubei Province as the study area,obtains the evaluation unit of cultivated land quality,and selects the reasonable development of cultivated land and agriculture in Xiang zhou District of the evaluation index,using AHP to determine the weight and establish a comprehensive evaluation system.By means of mathematical statistics and spatial autocorrelation,the characteristics and spatial distribution of cultivated land in Xiang zhou district are analyzed,and the corresponding suggestions for cultivated land quality protection are put forward.The results show that:(1)According to the evaluation results of cultivated land quality in Xiangzhou District,the range of comprehensive index of cultivated land quality in Xiangzhou District is 0.6958-0.9178.The quality of cultivated land belongs to the upper middle,and the quality of cultivated land is better on the whole.According to the comprehensive index of cultivated land quality,it is divided into seven grades by using GIS technology.There is a big gap in the area of cultivated land in different grades,and the area of higher land in Xiang zhou District is 61372.87 hectares,accounting for 37.31%of the cultivated land area in Xiang zhou District.The medium land area is 103789.10 hectares,accounting for 62.69%of the cultivated land area in Xiangzhou District,mainly distributed in Yushan Town,Huanglong Town,Huangji Town,Zhuji Town and other towns.(2)By using spatial autocorrelation analysis method,the spatial distribution characteristics of cultivated land quality in Xiangzhou District are analyzed.The global Moran’s I value is 0.541,which indicates that Xiangzhou District has positive correlation in cultivated land quality space and has significant spatial agglomeration.According to the results of local autocorrelation of cultivated land quality,the quality of cultivated land in the whole area shows the law of aggregation in the spatial distribution.Through LISA cluster map,we can see that most of the cultivated land is randomly distributed in space,H-H type and L-L type are distributed in group form,and the H-H type is mainly distributed in the middle of Dongjin Town,the middle of Shiqiao Town,the middle of Chenghe Town,the west of Zhangjiagi,the east of Longwang Town and the middle of Huanglong Town.The L-L type is distributed in the middle of Huopai Town,the southwest of Longwang Town and the northeast of Shiqiao Town;the H-L type and the L-H type are scattered,the L-H type is mainly distributed in the central and western part of Shiqiao Town and the southwest part of Yushan Town,and the H-L type is mainly distributed in the southwest corner of Dongjin Town,the northwest corner of Huanglong Town and the central and western part of Longwang Town.(3)Based on the spatial distribution of cultivated land quality and the current situation of cultivated land use in Xiangzhou District,the entire area is divided into key protected areas(HH type),quality improvement areas(HL type,LH type),structural optimization areas(NN type),and key areas.Remediation areas(LL-type)and other four types of protected areas,and for the four types of cultivated land protection areas,put forward strategies to protect the cultivated land according to local conditions,providing a reference for improving the quality of cultivated land and the layout of food production.