Spatial And Temporal Patterns Of Cultivated Land Resilience And Interaction Mechanism In The Middle Reaches Of The Yangtze River

Cultivable land is a vital source of food security.The Central Government’s No.1document has consistently emphasized the importance of national food security and cultivated land protection,and scientific cultivated land protection is the guarantee of national food security.As a result,this study proposes a framework for the formation of cultivated land resilience based on an analysis of the connotation,theoretical system,and mechanism of cultivated land resilience using resilience theory and the integration of geography,economics,and other multidisciplinary disciplines from a resilience perspective.A five-dimensional system of indicators for measuring the resilience of farmland in the middle reaches of the Yangtze River was developed.There are five subsystem resilience indices and 20 particular indicators in the system.36 prefecture-level cities in the middle reaches of the Yangtze River were selected,and the geographical and temporal patterns of cultivated land resilience in the middle reaches of the Yangtze River from 2001 to 2020 were researched and their processes were further explored.The study proposes differentiated paths to improve cultivated land resilience based on the resilience levels of different subsystems,providing relevant references for future research practices.Based on the aforesaid data,the following conclusions are reached from this study:(1)The results of the spatial and temporal evolution of overall cultivated land resilience show that the overall level of cultivated land resilience in the Yangtze River’s middle reaches showed an upward trend from 2001 to 2020,with the average resilience index increasing by7.2% in the last 20 years.Cultivated land resilience had a falling and then growing tendency,and maintained a geographical pattern of clustering near the intersection of Hunan,Hubei,and Jiangxi provinces over the majority of the time period.(2)The resilience of the production endowment dimension shows a "WW" type trend,the socio-economic dimension shows a fluctuating upward trend,the scale structure dimension shows a two-stage change,the resilience of the ecological pressure dimension shows a "WW" type trend,and the resilience of the food security dimension shows a "WW" type trend.The resilience index indicates an uneven fluctuation tendency in the food security factor.(3)The results of the spatial evolution of the toughness levels of each sub-dimension show that the spatial distribution of the production endowment dimension shows a distribution trend of high in the east,high in the south,low in the west and north,the spatial distribution of the socio-economic dimension varies greatly,the toughness of the scale structure dimension generally shows a distribution pattern of high in the northwest,high in the east and low in the southwest,the toughness of the ecological pressure dimension generally shows a shift of high value areas from the west to the east,the food security In general,the dimensional resilience of food security shows a distribution pattern of high in the northwest and southeast and low in the southwest.(4)The resilience of the arable land system in the middle reaches of the Yangtze River is determined by a combination of factors,which is reflected in the differences in the explanatory power of different factors in different periods.From 2001 to 2020,the scale structure factor,the ecological pressure factor and the food security factor always maintain a high explanatory power for the resilience of the cropland system,reflecting that the resilience of the cropland in the middle reaches of the Yangtze River is mainly influenced by the cropping structure,cropping behaviour and food output of the cropland during the study period.The extent of the role of factors within socio-economic factors on the resilience of cropland fluctuates and shows a decreasing trend in influence,and the explanatory power of production endowment factors on the resilience of cropland has increased in the 2012 and2016 time periods.(5)The mechanism of cropland resilience in the middle reaches of the Yangtze River can be explained by the three-stage evolution of "action factor-action path-action result",and the spatial heterogeneity of cropland resilience is the result of the interaction of multiple factors,with different factors in different regions acting on the resilience of cropland at different stages.The spatial heterogeneity of cropland resilience is the result of the interaction of multiple factors,with different levels of factor effects on cropland resilience in different regions.In 2006,the socio-economic-scale structure and socio-economic-ecological pressure interactions were significant;in 2012,the interactions of ecological pressure-food security,socio-economic-scale structure and scale structure-ecological pressure had the most obvious effect on arable land resilience;in 2016,production endowment-food security,production endowment-scale structure and scale structure-ecological pressure both acted on arable land resilience;In 2020,the proportion of sown area of food crops and total crop output value per unit area have stronger interactions with other factors on arable land resilience;the socio-economic-scale structure and scale-structure-food security factors have stronger interactions.The article finally proposes countermeasures to improve the resilience of cultivated land in the middle reaches of Yangtze River based on the analysis of the spatial and temporal evolution characteristics of the resilience of cultivated land and its mechanism of action: 1)multiple means to improve the resilience of farmland production endowment;2)multiple ways to improve the socio-economic resilience of farmland;3)multiple measures to enhance the resilience of farmland scale structure;4)multiple methods to consolidate the resilience of farmland ecological pressure;5)multiple directions to optimize the resilience of farmland food security.