Trade-off And Synergy Relationships And Zoning Regulation Of Multifunctional Cultivated Land At County Scale In Zhejiang Province

Cultivated land is the basic material resource that people rely on for survival and development,and an important basis and guarantee for food security.For a long time,agricultural production function of cultivated land has played an important role in ensuring food security.With the development of society and economy and the change of people’s way of production and life,people’s diversified demands for cultivated land are increasing,and the functions of cultivated land such as its economic contribution,social security and ecological security are becoming increasingly apparent.However,cultivated land is a complex human-land coupled ecosystem,and how to realize the coordinated and healthy development of cultivated land is the problem our country is facing.Therefore,on the basis of analyzing the connotation of cultivated land multifunctional,this study took Zhejiang Province as the research area,established the cultivated land multifunctional evaluation index system,and quantitatively evaluated the agricultural production,economic contribution,social security,ecological security function and comprehensive function index of cultivated land in counties of Zhejiang Province from 2010 to 2020,and explored the spatial and temporal distribution characteristics of cultivated land multifunctional.This paper reveals the spatio-temporal cooperative tradeoff relationship between the multifunctional of cultivated land in Zhejiang Province,and finally delimits the comprehensive zoning with the dominant and potential cultivated land function as the zoning target,and then puts forward the differentiated cultivated land zoning control policy suggestions,in order to provide reference for optimizing the multifunctional utilization and protection of cultivated land.The results show that:(1)The functions of cultivated land in counties of Zhejiang Province from 2010 to2020 showed different spatio-temporal differentiation characteristics.In terms of dynamic changes.In terms of spatial differentiation,the integrated function index of cultivated land fluctuated somewhat but showed an overall upward trend,showing a spatial pattern of “high in northwest and low in southeast”.Agricultural production function showed a spatial pattern of “higher in the north and lower in the south”,and showed a significant upward trend on the whole.In general,the economic contribution function showed a spatial pattern of “high in the northwest and low in the southeast”,and the number and range of high value areas were expanding continuously.The social security function presents a spatial pattern of “high in the west and low in the east,high in the south and low in the north”,and the spatial difference is intensifying.Ecological security function showed a spatial pattern of “high east and west,low north and south”,showing a downward trend.(2)The spatial and temporal differences of trade-offs and synergies between cultivated land use functions in counties of Zhejiang Province from 2010 to 2020 were significant.From the perspective of spatial correlation characteristics,the spatial and temporal differences of trade-offs and synergies among various functions of cultivated land in Zhejiang Province from 2010 to 2020 were significant.From 2010 to 2020,agricultural production-economic contribution of cultivated land in Zhejiang Province showed a spatial pattern of synergism weakening.Social security-ecological security function and agricultural production-social security function show synergistic strengthening spatial pattern.Overall,the function of agricultural production-ecological security shows a trade-off effect,that is,there is a spatial pattern of trade-off.The function of economic contribution and social security mainly shows the spatial pattern of high coordination.The tradeoff and synergy between economic contribution and ecological security function have no obvious rule.From the perspective of coupling coordination degree,during 2010-2020,the distribution range of counties and districts with the coordinated state of multi-functional coupling coordination degree of county cultivated land in Zhejiang Province is wide,mainly distributed in the west of Zhejiang Province and parts of Jiaxing and Shaoxing,showing the characteristics of large quantity,wide distribution and obvious agglomeration trend.The number of districts and counties with low coupling degree of cultivated land multifunction is small,scattered in southeast Zhejiang Taizhou area and north Zhejiang Jiaxing area.(3)Based on the characteristics of the dominant functional types and multifunctional coupling coordination of cultivated land,Zhejiang Province was divided into five zones,namely,the leading ecological agriculture zone,the modern agriculture construction zone,the leading agricultural production zone,the cooperative utilization development zone and the cooperative potential enhancement zone,and the differentiated policies were put forward for each zone.