Multidimensional Accounting of Ecological Value of Cultivated Land Resources in Anhui Province and Its Spatiotemporal Heterogeneity Effects
Scientific and reasonable accounting of the ecological value of arable land resources is an important task and key link in the all-round protection of arable land resources and the establishment of ecological compensation mechanism.Combining theoretical analysis and practical application,from the ecological support dimension,ecological regulation di-mension and ecological derivation dimension,the ecological value of arable land resources is unified and standardized to construct the ecological value accounting indexes.Using the panel data of 104 counties in Anhui Province as the empirical evidence,the modeling algorithms including kernel density,spatial autocorrelation,and SOFM are used for accounting the ecological value of arable land resources in terms of its spatial pattern,evolution characteristics and type division,and dif-ferentiated control measures are proposed as well.Results indicate that the ecological value of arable land resources shows an overall upward trend,with the highest ecological value of arable land reaching RMB 25 666/hm2 in 2015,and the low-est being only RMB 22 284/hm2 in 2010,with a year-on-year increase of 12％compared with that of 2010.The value of ecological support dimension accounts for a larger proportion,and the value of ecologically derived services accounts for a smaller proportion;the value of ecological regulating services rises year by year,and the value of ecological support ser-vices and ecologically derived services has an overall upward trend,with some years showing a slight decline.The global Moran's I index of ecological value of arable land resources ranges from 0.792 to 0.808.The ecological value of arable land resources is strongly clustered,with the high value area being higher and the low value area being lower.The high-value area is concentrated in the southeastern and western areas,while the low-value area is concentrated in the northern area and part of the urban center,presenting the general layout of"high in the south and low in the north,high in the west and low in the east".The distribution of ecological value density of arable land generally shows a rightward orientation,showing obvious skewed distribution and polarization degree characteristics,there is a more obvious bimodal trend,present-ing a"one main and one secondary"spatial pattern,and the multi-level differentiation is more obvious.The ecological value of arable land resources is characterized by significant spatial and temporal heterogeneity,which is divided into the southwestern mountainous ecological function maintenance area,the central hilly ecological function coordination area,and the northern plains ecological function enhancement area.The differentiated management and control strategies are proposed for the different areas,which will help to bring into play the regulation of the ecological value of arable land resources and the effective protection of arable land resources.
cultivated land resourcesecological valuemultidimensional accountingspatial and temporal heterogeneity effectscontrol strategiesmain grain producing areas
万方数据
维普
