Spatial Non-stationary Effects of Factors Affecting Cultivated Land Quality Degradation in the Typical Black Soil Region of the Northeast China:A Case Study of Fujin City
The purpose of this study is to explore the comprehensive spatial non-stationary effect of the factors affecting cultivated land quality degradation in the typical northeast black soil area,to provide the theoretical support for the management of cultivated land quality degradation in black soil area.The research methods of incremental spatial autocorrelation,exploratory regression and geographical weighted regression improved structural equation model(GWR-SEM)are used to identify and diagnose the optimal spatial scale and the main controlling factors affecting cultivated land quality degradation,and reveal the law of different action after multiple spatial drives among factors,taking Fujin City as the study area.The research results are show that:1)the proportion of cultivated land quality degradation in the study area from 2000 to 2020 is about 1/3,and the degradation trend is significantly different among different townships,the degradation rate is relatively large,and the cultivated land quality degradation features gradient decline in the central,western and eastern regions.2)The optimal spatial scale of cultivated land quality degradation in the study area was 1 390 m,and the main controlling factors were vegetation cover,average land power consumption,annual evaporation,average land GDP and straw cover,respectively.3)After single and interactive interaction,the main controlling factors had significant differences in the comprehensive effect of spatial non-stationarity on the quality degradation of cultivated land in the study area,and the spatial interaction between the main controlling factors had both synergistic and antagonistic driving relations on the single non-stationarity effects of the factors.In conclusion,the study area based on the main controlling factors of a single space rather than the stationary effects to undertake the targeted partition management at the same time,to fully consider the interaction of the single factor effects of synergy and antagonistic relationship,build"main+auxiliary"management mode,realize two-wheel driven governance of black soil cultivated land quality degradation,and reverse black soil area cultivated land quality degradation.
cultivated land quality degradationinfluencing factorsspatial non-stationaritystructural equation model improved by geographical weighted regressionthe northeastern black soil region
NETL
NSTL
万方数据
