Study On Spatiotemporal Variation Of Cultivated Land Replanting Index And Its Influencing Factors In Henan Province

In recent years,in the supply-side structural reform of agriculture,it is proposed to adjust the agricultural planting structure and implement the strategy of storing grain in the land.The central no.1 document for 2018 also calls for improving the quality of agricultural development and protecting the quality of arable land.With the social and economic development of henan province,a large amount of agricultural land is transformed into non-agricultural land.Although this accelerated the process of urbanization to a certain extent,it also caused a certain negative impact on agriculture,causing ecological problems such as the decline of groundwater level and heavy metal pollution in some areas.Henan province as a major grain producing areas,multiple crop index is higher in henan,the eastern region,the land in high load condition,is not conducive to the sustainable development of agriculture.In this background,to adjust regional farmland planting structure in henan province,reduce the multiple crop index,makes possible the rest of the land,this is of great significance for improving the quality of cultivated land and protecting the ecological environment.As the national important grain base in henan province,the quality and quantity of cultivated land has important influence on grain production.This paper studies the theory of agricultural supply side reform and sustainable development,the data of sown area of crops and cultivated land in henan province were sorted out and the index of multiple planting index was obtained by statistical data method.In terms of time,the change of overall multiple species index in henan province was analyzed,and in terms of space,the multiple species index in various counties in henan province was analyzed and studied in time and space in five years,and the specific development trend was obtained.In the study of factors influencing the change of multiple cropping index take time,space,two aspects are analyzed.From the time the influence factor of multiple cropping index in henan regression analysis,authors found that the per capita arable land area,evaluation,rural employment,grain yield,agricultural machinery total power,greater impact on multiple crop index.In space,the cities of henan province were divided into four regions with terrain as the criterion,it is found that the urbanization rate has a great influence on the multiple species index in the plain area of huang-huai-hai.The amount of plastic film used in the area of tongbai mountain had a great influence on the multiple cropping index.In taihang mountain,the total power of agricultural machinery has a great influence on the multiple cropping index.In this area of funiu mountain,the rural employment personnel has a great influence on the change of the multiple cropping index.Based on the factors affecting the change of multiple cropping index in each region and the actual situation of cultivated land use,the corresponding policy Suggestions were put forward.We should formulate the corresponding multiple cropping index system,increase government policy support,adapt to market demand,and rationally adjust the agricultural planting structure and increase agricultural input in different regions.Appropriate rotation and fallow of cultivated land should be carried out in reasonable areas to protect the ecological environment and improve the quality of cultivated land,so as to achieve the effect of land use and land conservation,thus promoting sustainable agricultural development and improving the quality of agricultural development.