中文摘要：

为研究天津市郊区土壤细粒径的空间分布及变异性,以郊区土壤细颗粒中位粒径为研究对象,基于Arcgis和geoda平台,运用地统计学方法,在对数据进行空间相关性分析的基础上,采用普通克里格插值法,由采样点土壤粒径数据创建该区域土壤粒径预测表面,得出天津市郊区土壤细粒径的空间分布特征：总体来看,天津市蓟县、宝坻区、武清区、北辰区、西青区、静海县等土壤粒径较大,其中个别小区域土壤粒径较小,而天津市宁河县,汉沽区、东丽区、塘沽区、大港区、津南区土壤粒径较小,其中个别小区域土壤粒径较大;半变异函数分析可知郊区土壤细粒径具有中等程度的相关性,土壤粒径产生的变异是耕作,种植制度等随机因素和地形、土壤类型、母质等结构性因素共同作用的结果。

英文摘要：

With soil median diameter as the object,based on geoda and ArcGIS,using geostatistical analysis method,the spatial distribution and variability of soil fine diameter in the suburbs of Tianjin were analyzed.Based on spatial correlation analysis,ordinary Kriging method was used to establish the soil diameter surface.Results indicated that soil diameter in the districts of Jixian,Baodi,Wuqing,Beichen,Xiqing,Jinghai was larger,in which some individual areas were smaller;while soil diameter in Ninghe,Hangu,Dongli,Tanggu,Dagang,Jinnan was smaller,in which some individual areas were larger.Semivariogram analysis indicated that variables had moderate correlation,and variability was the results of random factors like farming and cropping systems,and structural factors like climate,parent material,topography and soil types.