The Division Of Quality Of Cultivated Land And The Research Of Control Based On Multi-functional Perspective

In the background of the rapid development of urban agriculture,this paper takes the representative and advanced Shanghai as an example.Starting with the multi-functional characteristics of urban agriculture,this paper analyzes the new requirements for the classification of cultivated land quality monitoring types,and on this basis analyses the causes and driving force of the multi-function change of cultivated land in Shanghai.To build up the classification and evaluation system of cultivated land quality monitoring types in accordance with the situation,to innovate the classification area of the quality monitoring types of cultivated land in Shanghai,and to put forward the key points of the monitoring area,to guide the quality monitoring work of the cultivated land in Shanghai,and to provide the basic impetus for the future development,and provide reference for the direction of the arable land utilization in the future of Shanghai.Basis。The conclusions of the study are as follows:(1)To explore new directions for the classification of cultivated land quality monitoring areas based on multi-functional farmland.First of all,sort out the multiple pressures faced by the protection of cultivated land quality in large cities,and highlight more ways to protect cultivated land.Secondly,it analyzes the trend of multi-functional existence of cultivated land in large cities,and explores the new connotation of the multi-functional development of arable land in large cities.Then,in view of the connotation requirements of multi-function of cultivated land in large cities,new requirements for the classification of cultivated land quality monitoring types are put forward,and an open type evaluation index system for the classification of cultivated land quality monitoring types is constructed.(2)By combing the development history of urban agriculture in Shanghai,this paper analyzes the driving force of cultivated land production,social and ecological function changes in Shanghai,and constructs the index evaluation system of monitoring types according to the function of cultivated land use.The suburb of Shanghai city from the suburban traditional agriculture to the development of modern urban agriculture,although the area of cultivated land has decreased,but the increase in agricultural value has been increasing,indicating that a single grain subsidy has been bid farewell,the layout of the production space is diverse,the multi-function of the cultivated land is good,and the added value of agriculture is increased.The main driving force of the change of cultivated land use function is the change of grain crop area,the difference of industrial and agricultural output value,the change of agricultural population and the policy planning.(3)Select appropriate indicators to build an evaluation index system for monitoring the types of cultivated land quality in Shanghai.Combined with the change of cultivated land function and the distribution of cultivated land in Shanghai City,3 monitoring areas are divided into the main grain production monitoring area,the urban multi-functional ecological agriculture monitoring area and the ecological sensitive monitoring area around the city.By establishing the index system,the evaluation is divided into the selected monitoring area,the sub key detection area and the key monitoring area,and the key monitoring is finally selected.The area and key monitoring areas are the ultimate monitoring units for the monitoring of cultivated land quality in Shanghai.(4)On the basis of the type division of cultivated land quality monitoring,it provides some guidance and reference for the future arable land utilization and the strategic planning of modern urban agricultural industrialization in Shanghai city.The advantages of urban agricultural layout in Shanghai will be more obvious in the future combined with the multi-function of cultivated land.Prominent agricultural comprehensive development of land use pattern.