Research On The Protection Of Cultivated Land Along The Yellow River In Henan Province Based On Food Security And Ecological Competitiveness

Cultivated land is the basic resource and condition for human survival and the basis of agricultural production.With the development of economy and the increase of population,the problem of food security has become increasingly prominent,and the ecological status of cultivated land has also been affected to varying degrees.As a major agricultural province,Henan Province plays a pivotal role in the national grain production pattern,and the task of protecting cultivated land is difficult.Therefore,from the perspective of multi-directional protection of cultivated land,this paper takes the area along the Yellow River in Henan Province as the research area.Through relevant data and literature collection,data sorting and analysis and model construction,seven indicators such as grain yield per unit area,productivity stability and land reclamation rate are selected to build a food security evaluation model based on the three dimensions of "supply conditions guarantee conditions acquisition conditions".Eleven indicators including cultivated land resource endowment,water resource endowment,and proportion of effective irrigated area were selected to construct an evaluation model of cultivated land ecological competitiveness based on four aspects:"natural endowment-input factorsmanagement facilities-capital rights and interests".The weight of each index was determined by the analytic hierarchy process,and the multi-factor synthesis method was used to superimpose each index factor of the evaluation unit to obtain the evaluation results of food security and cultivated land ecological competitiveness in the study area.On this basis,an obstacle factor model was constructed to diagnose the main obstacle factors affecting food security and cultivated land ecological competitiveness in the study area in 2020,and the four-quadrant method was used to synthesize the evaluation results of food security and cultivated land ecological competitiveness in the study area in 2020,and divided cultivated land protection zones.And put forward differentiated protection recommendations.The evaluation results of food security in the region along the Yellow River in Henan Province show that the overall score of comprehensive evaluation of food security in the study area fluctuates and rises,showing a spatial distribution pattern of better in the East and worse in the West.The comprehensive evaluation score of cultivated land ecological competitiveness is generally stable,with a spatial pattern of high in the West and low in the East.In 2020,the obstacles of grain yield per unit area,multiple cropping index and land reclamation rate in the evaluation index of food security along the Yellow River in Henan Province are relatively high;among the evaluation indexes of cultivated land ecological competitiveness,the obstacle degrees of chemical fertilizer input intensity,the proportion of effective irrigation area,the area of new shelter forest and financial support for agriculture are relatively high.Using the four-quadrant method to synthesize the evaluation results of food security and cultivated land ecological competitiveness in 2020,the cultivated land protection zones are divided into core protection areas,ecological adjustment areas,production capacity improvement areas and comprehensive improvement areas,accounting for 13.59%,28.03%,49.19%,9.19%.This paper constructs evaluation indicators based on the connotation of food security and ecological competitiveness of cultivated land,aiming at zoning ecological protection of cultivated land from a broader dimension,so as to achieve the common improvement of food security and ecological level of cultivated land.