东北地区县域耕地利用系统安全驱动力因子及其空间分异

[目的]确定耕地利用系统安全变化的驱动力空间差异,为保护耕地和保障粮食安全服务。[方法]以东北区典型区域巴彦县为研究区,运用"3S"技术,采用相关分析和Logistic回归模型,对影响耕地利用系统安全的驱动力因子进行识别和分析;采用单因子评价法和Kriging插值法分析驱动因子影响程度及其空间分布,揭示空间分异规律。[结果](1)地貌类型、土壤类型、土壤质地、速效磷、排涝能力和政策法规对系统安全具有促进作用,高程、比值植被指数、人口密度和水土流失对系统安全具有抑制作用。(2)各驱动力因子在空间上打破了原来的耕地利用分区,呈现出以地理空间为基础的空间分异特征。[结论](1)各驱动因子对研究区耕地利用系统安全均有不同程度的影响。(2)各驱动因子对耕地利用系统安全的影响程度在地域空间上有明显的分异规律。

Driving Factors and Its Spatial Variation of Cultivated Land Use System Security for Black Soil Region of County Level in Northeast China

[Objective] We aimed to identify the driving factors that influence the cultivated land use system security in order to provide basis for the protection of cultivated land and guarantee of food security.[Methods] Bayan County, a typical black soil region of Northeastern China was selected as a case study to identify the driving factors that influence the security of cultivated land use system. "3S" technology was used, correlation analysis and Logistic regression model were employed. Single factor evaluation and Kriging methods was used to reveal the influence degree and spatial distribution of driving forces.[Results] (1) The landform type, soil type, soil texture, available phosphorus, drainage capability and safety policies and regulations showed a positive effect on cultivated land use system security. While elevation, the ratio vegetation index, water loss, population density and soil erosion showed a negative effect on cultivated land use system security.(2) The driving factors broke the original land use pattern, and presented a spatial distribution properties based on the geographic space.[Conclusion] (1) Each driving factor has different effects on the cultivated land use system security in the study area.(2) The impacts of driving factors on the cultivated land use system security show different spatial distribution and various patterns.