山东省耕地显性转型时空特征及影响因素分析

ANALYSIS ON THE SPATIOTEMPORAL CHARACTERISTICS AND INFLUENCING FACTORS OF THE EXPLICIT TRANSFORMATION OF CULTIVATED LAND IN SHANDONG

使用修正后的栅格数据叠加法和主成分分析法,结合景观指数分析山东省耕地显性形态转型的整体变化、分区变化、形态变化特征和影响因素.研究结果:山东省耕地显性转型以耕地的转出过程为主,在一定空间范围内呈现出聚集特征;耕地转入过程多聚集于黄河三角洲、微山湖等近水域地区.依照LUCC分类体系,耕地显性转型路径主要为“111111551”,该路径占总体耕地转型路径的22.898%.耕地斑块的分割程度、密度、形状不规则程度及分散程度在逐渐增加,而斑块面积及聚集度正在逐渐减小.影响因素通过耕地非农利用(z_(1))和耕地保护(z_(2))主成分作用于耕地显性转型,z_(1)以城镇人口为主导反映耕地向其他地类的转化趋势,z_(2)以农村人口为主导,反映耕地稳定性.

Based on approaches of fixed raster overlay,principal component analysis and landscape metrics analysis,this study concerns change of dominance transformation in cultivated land in Shandong,which consists of its holistic change,zoning change,pattern change and influencing factors.The results showed that:1)Change of dominance transformation in cultivated land is dominated by the roll-in process in Shandong,which exhibits agglomeration characteristics within a certain spatial range and is mostly concentrated in the Yellow River Delta,Weishan Lake and other near water areas.2)According to the LUCC classification system,the dominant path of cultivated land transformation is"111111551".Namely,between 1980 and 2008,cultivated land was stable and unchanged,while between 2013 and 2015,construction land was restored to cultivated land,which accounted for 22.898%of the total cultivated land conversion path.3)The degree of segmentation,density,irregularity and dispersion of cultivated land patches are gradually increasing,while the patch area and degree of aggregation are gradually decreasing.4)The influencing factors affect the dominant transformation of cultivated land through the principal components of cultivated land in non-agricultural use(z_(1))and cultivated land protection(z_(2)).z_(1)is dominated by urban population,reflecting the transformation trend of cultivated land to other land types,and z_(2)is dominated by rural population,reflecting the stability of cultivated land.