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选取河南省中部典型样区为研究对象,利用仙农熵变形公式计算了1 km×1 km、3 km×3 km、5 km×5 km三种网格尺度下的土壤空间分布多样性,运用GIS技术和灰色理论探讨了多样性指数与景观指数之间的关联性,综合评价了研究区的土壤类型空间分布格局,研究表明:平均斑块形状指数大多小于2.0,说明土属斑块形状相对比较规则,受人为干扰的程度比较高;同一土属的空间分布多样性指数在不同网格尺度下具有相似的分异规律,其中空间分布相对比较均匀的土壤是黄砂潮褐土(多样性指数为:0.790);景观分离度指数与土壤空间分布多样性之间存在一定的负相关关系,相关系数为R2=0.866;平均斑块面积指数与空间分布多样性指数之间的回归方程为y=0.099ln(x)+0.644,R2=0.625;面积指数与土壤空间分布多样性之间存在明显的正相关关系,相关系数R2=0.865。
Taking the typical sample area in central part of Henan Province as the research object, the spatial distribution diversity of soil under three grid scales of 1 km × 1 km, 3 km × 3 km and 5 km × 5 km was calculated by using entropy deformation formula of Sinon. GIS technology and gray theory to explore the relationship between diversity index and landscape index, and to comprehensively evaluate the spatial distribution pattern of soil types in the study area. The results show that the average patch shape index is less than 2.0, indicating that the shape of soil patch is relative Compared with the rules, the degree of human disturbance is relatively high. The spatial distribution diversity index of the same soil genus has similar differentiation rules at different grid scales, and the soil with relatively uniform spatial distribution is yellow-brown cinnamon soil (diversity index Is 0.790). There is a certain negative correlation between landscape resolution index and soil spatial distribution diversity, the correlation coefficient is R2 = 0.866. The regression equation between average patch area index and spatial distribution diversity index is y = 0.099ln (x) + 0.644, R2 = 0.625; there is a significant positive correlation between area index and soil spatial distribution diversity, the correlation coefficient R2 = 0.865.